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<head>
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<meta charset=utf-8>
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<meta name=viewport content="width=device-width,initial-scale=1,shrink-to-fit=no">
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<meta name=generator content="Hugo 0.92.2">
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<meta name=generator content="Hugo 0.93.0">
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<meta name=robots content="index, follow">
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<link rel="shortcut icon" href=/favicons/favicon.ico>
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<link rel=apple-touch-icon href=/favicons/apple-touch-icon-180x180.png sizes=180x180>
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@ -14,8 +14,7 @@
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<link rel=icon type=image/png href=/favicons/android-96x96.png sizes=96x96>
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<link rel=icon type=image/png href=/favicons/android-144x144.png sizes=144x144>
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<link rel=icon type=image/png href=/favicons/android-192x192.png sizes=192x192>
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<title>Multi-file Download | alguidelines.dev - Business Central Design Patterns</title>
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<meta name=description content="By Martin Dam at Microsoft Development Center Copenhagen
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<title>Multi-file Download | alguidelines.dev - Business Central Design Patterns</title><meta name=description content="By Martin Dam at Microsoft Development Center Copenhagen
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Abstract
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The goal of this pattern is to enable the users to download multiple files as a zip …">
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<meta property="og:title" content="Multi-file Download">
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@ -41,8 +40,7 @@ Description When generating reports that consists of multiple, and usually an un
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<link href=/scss/main.min.84a617ff0c0265eb62b5cd2929c572f4ed37dc4907d0cf068be4eb2974f6d60f.css rel=stylesheet integrity>
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</head>
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<body class=td-page>
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</head><body class=td-page>
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<header>
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<nav class="js-navbar-scroll navbar navbar-expand navbar-dark flex-column flex-md-row td-navbar">
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<a class=navbar-brand href=/>
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@ -54,36 +52,24 @@ Description When generating reports that consists of multiple, and usually an un
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<ul class="navbar-nav mt-2 mt-lg-0">
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<li class="nav-item mr-4 mb-2 mb-lg-0">
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<a class=nav-link href=/docs/><i class="fas fa-book"></i><span>Docs</span></a>
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<li class="nav-item mr-4 mb-2 mb-lg-0">
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</li><li class="nav-item mr-4 mb-2 mb-lg-0">
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<a class=nav-link href=https://github.com/microsoft/alguidelines/discussions/ target=_blank><i class="fas fa-comments"></i><span>Discussions</span></a>
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<a class=nav-link href=https://github.com/microsoft/alguidelines target=_blank><i class="fab fa-github"></i><span>GitHub</span></a>
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<a class=nav-link href=https://discord.gg/4wbfNv3 target=_blank><i class="fab fa-discord"></i><span>Discord</span></a>
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</li>
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</ul>
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</div>
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<div class="navbar-nav d-none d-lg-block"><input type=search class="form-control td-search-input" placeholder=" Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.9ab69a84696ad11cb17318558d9706e3.json data-offline-search-base-href=/ data-offline-search-max-results=10>
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</div>
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</nav>
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</header>
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<div class="container-fluid td-outer">
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</li></ul></div><div class="navbar-nav d-none d-lg-block"><input type=search class="form-control td-search-input" placeholder=" Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.c6558a635de208ea1007e79e444e323a.json data-offline-search-base-href=/ data-offline-search-max-results=10>
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</div></nav></header><div class="container-fluid td-outer">
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<div class=td-main>
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<div class="row flex-xl-nowrap">
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<aside class="col-12 col-md-3 col-xl-2 td-sidebar d-print-none">
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<div id=td-sidebar-menu class=td-sidebar__inner>
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<div id=content-mobile>
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<form class="td-sidebar__search d-flex align-items-center">
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<input type=search class="form-control td-search-input" placeholder=" Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.9ab69a84696ad11cb17318558d9706e3.json data-offline-search-base-href=/ data-offline-search-max-results=10>
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<input type=search class="form-control td-search-input" placeholder=" Search this site…" aria-label="Search this site…" autocomplete=off data-offline-search-index-json-src=/offline-search-index.c6558a635de208ea1007e79e444e323a.json data-offline-search-base-href=/ data-offline-search-max-results=10>
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<button class="btn btn-link td-sidebar__toggle d-md-none p-0 ml-3 fas fa-bars" type=button data-toggle=collapse data-target=#td-section-nav aria-controls=td-docs-nav aria-expanded=false aria-label="Toggle section navigation">
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</button>
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</form>
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</div>
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<div id=content-desktop></div>
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<nav class="collapse td-sidebar-nav" id=td-section-nav>
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</form></div><div id=content-desktop></div><nav class="collapse td-sidebar-nav" id=td-section-nav>
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<ul class="td-sidebar-nav__section pr-md-3 ul-0">
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<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-docs-li>
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<a href=/docs/ title="AL Guidelines" class="align-left pl-0 td-sidebar-link td-sidebar-link__section tree-root" id=m-docs><span>Docs</span></a>
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@ -101,9 +87,9 @@ Description When generating reports that consists of multiple, and usually an un
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<a href=/docs/patterns/facade-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsfacade-pattern><span>Façade</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docspatternsgeneric-method-pattern-li>
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<a href=/docs/patterns/generic-method-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsgeneric-method-pattern><span>Generic Method</span></a>
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</li>
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</ul>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsbestpractices-li>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docspatternsno-series-li>
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<a href=/docs/patterns/no-series/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docspatternsno-series><span>No. Series</span></a>
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</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsbestpractices-li>
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<a href=/docs/bestpractices/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsbestpractices><span>Best Practices</span></a>
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<ul class="ul-2 foldable">
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<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsbestpracticesapi-page-li>
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@ -150,9 +136,7 @@ Description When generating reports that consists of multiple, and usually an un
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<a href=/docs/bestpractices/variable-naming/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsbestpracticesvariable-naming><span>Variable Naming</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsbestpracticesvariables-declarations-order-li>
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||||
<a href=/docs/bestpractices/variables-declarations-order/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsbestpracticesvariables-declarations-order><span>Variables Declarations Order</span></a>
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||||
</li>
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||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-docsnavpatterns-li>
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||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-docsnavpatterns-li>
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<a href=/docs/navpatterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns><span>NAV Patterns Archive</span></a>
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||||
<ul class="ul-2 foldable">
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||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child active-path" id=m-docsnavpatternspatterns-li>
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||||
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@ -167,9 +151,7 @@ Description When generating reports that consists of multiple, and usually an un
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<ul class="ul-4 foldable">
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||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsblocked-entitydata-driven-blocked-entity-li>
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||||
<a href=/docs/navpatterns/patterns/blocked-entity/data-driven-blocked-entity/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsblocked-entitydata-driven-blocked-entity><span>Data Driven Blocked Entity</span></a>
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||||
</li>
|
||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternscached-web-service-calls-li>
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</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternscached-web-service-calls-li>
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||||
<a href=/docs/navpatterns/patterns/cached-web-service-calls/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternscached-web-service-calls><span>Cached Web Server Calls</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsconditional-cascading-update-li>
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||||
<a href=/docs/navpatterns/patterns/conditional-cascading-update/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsconditional-cascading-update><span>Conditional Cascading Update</span></a>
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<ul class="ul-4 foldable">
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<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsnet-exception-handling-in-caltryfunction-net-exception-handling-in-cal-li>
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<a href=/docs/navpatterns/patterns/net-exception-handling-in-cal/tryfunction-net-exception-handling-in-cal/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnet-exception-handling-in-caltryfunction-net-exception-handling-in-cal><span>TryFunction NET Exception Handling in CAL</span></a>
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</li>
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||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsno-series-li>
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</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsno-series-li>
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<a href=/docs/navpatterns/patterns/no-series/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsno-series><span>No Series</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatternspatternsnotifications-li>
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<a href=/docs/navpatterns/patterns/notifications/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatternspatternsnotifications><span>Notifications</span></a>
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@ -235,9 +215,7 @@ Description When generating reports that consists of multiple, and usually an un
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<a href=/docs/navpatterns/patterns/notifications/in-context-notifications/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnotificationsin-context-notifications><span>In-context Notifications</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsnotificationsnotification-lifecycle-management-pattern-li>
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||||
<a href=/docs/navpatterns/patterns/notifications/notification-lifecycle-management-pattern/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsnotificationsnotification-lifecycle-management-pattern><span>Notification Lifecycle Management Pattern</span></a>
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</li>
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||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsobserver-li>
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||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsobserver-li>
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<a href=/docs/navpatterns/patterns/observer/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsobserver><span>Observer</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsposting-routine-select-behavior-li>
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||||
<a href=/docs/navpatterns/patterns/posting-routine-select-behavior/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsposting-routine-select-behavior><span>Posting Routine - Select Behavior</span></a>
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@ -252,9 +230,7 @@ Description When generating reports that consists of multiple, and usually an un
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<a href=/docs/navpatterns/patterns/queries/use-queries-to-detect-duplicate-records/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsqueriesuse-queries-to-detect-duplicate-records><span>Use Queries to Detect Duplicate Records</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternsqueriesuse-queries-to-replace-nested-loops-li>
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||||
<a href=/docs/navpatterns/patterns/queries/use-queries-to-replace-nested-loops/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsqueriesuse-queries-to-replace-nested-loops><span>Use Queries to Replace Nested Loops</span></a>
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</li>
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||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsread-once-initialization-and-validation-li>
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||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsread-once-initialization-and-validation-li>
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||||
<a href=/docs/navpatterns/patterns/read-once-initialization-and-validation/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsread-once-initialization-and-validation><span>Read-once Initialization and Validation</span></a>
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</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsreleased-entity-li>
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<a href=/docs/navpatterns/patterns/released-entity/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsreleased-entity><span>Released Entity</span></a>
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<a href=/docs/navpatterns/patterns/security/4-masked-text/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssecurity4-masked-text><span>Masked Text</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssecurity5-ssl-in-nav-li>
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||||
<a href=/docs/navpatterns/patterns/security/5-ssl-in-nav/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssecurity5-ssl-in-nav><span>SSL in NAV</span></a>
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||||
</li>
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||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternssetup-specificity-fallback-li>
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||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternssetup-specificity-fallback-li>
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||||
<a href=/docs/navpatterns/patterns/setup-specificity-fallback/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssetup-specificity-fallback><span>Setup Specificity Fallback</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternssilent-file-upload-and-download-li>
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||||
<a href=/docs/navpatterns/patterns/silent-file-upload-and-download/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssilent-file-upload-and-download><span>Silent File Upload and Download</span></a>
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||||
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@ -291,11 +265,7 @@ Description When generating reports that consists of multiple, and usually an un
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|||
<a href=/docs/navpatterns/patterns/singleton/singleton-table/cue-table/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssingletonsingleton-tablecue-table><span>Cue Table</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatternspatternssingletonsingleton-tablesetup-table-li>
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||||
<a href=/docs/navpatterns/patterns/singleton/singleton-table/setup-table/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternssingletonsingleton-tablesetup-table><span>Setup Table</span></a>
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||||
</li>
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||||
</ul>
|
||||
</li>
|
||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsstandard-journal-li>
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||||
</li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsstandard-journal-li>
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||||
<a href=/docs/navpatterns/patterns/standard-journal/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsstandard-journal><span>Standard Journal</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternstemporary-dataset-report-li>
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||||
<a href=/docs/navpatterns/patterns/temporary-dataset-report/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternstemporary-dataset-report><span>Temporary Dataset Report</span></a>
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||||
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@ -305,18 +275,14 @@ Description When generating reports that consists of multiple, and usually an un
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|||
<a href=/docs/navpatterns/patterns/transfer-custom-fields/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternstransfer-custom-fields><span>Transfer Custom Fields</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternspatternsvariant-facade-li>
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||||
<a href=/docs/navpatterns/patterns/variant-facade/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternspatternsvariant-facade><span>Variant Facade</span></a>
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||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns2-anti-patterns-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns2-anti-patterns-li>
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||||
<a href=/docs/navpatterns/2-anti-patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns2-anti-patterns><span>2. Anti-Patterns</span></a>
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||||
<ul class="ul-3 foldable">
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||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns2-anti-patternsnav-upgrade-li>
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||||
<a href=/docs/navpatterns/2-anti-patterns/nav-upgrade/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns2-anti-patternsnav-upgrade><span>Nav Upgrade</span></a>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns2-anti-patternsreusable-bugs-li>
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||||
<a href=/docs/navpatterns/2-anti-patterns/reusable-bugs/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns2-anti-patternsreusable-bugs><span>Reusable Bugs</span></a>
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||||
</li>
|
||||
</ul>
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||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns3-cal-coding-guidelines-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns3-cal-coding-guidelines-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelines><span>3. CAL Coding Guidelines</span></a>
|
||||
<ul class="ul-3 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesdesign-li>
|
||||
|
|
@ -350,18 +316,14 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/navpatterns/3-cal-coding-guidelines/design/variable-capacity-mismatch/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesdesignvariable-capacity-mismatch><span>Variable Capacity Mismatch</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesdesignwith-scope-name-collision-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/design/with-scope-name-collision/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesdesignwith-scope-name-collision><span>WITH Scope Name Collision</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/internally-used-dot-net-types/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesinternally-used-dot-net-types><span>Internally used DotNet Types</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalization-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/internationalization/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalization><span>Internationalization</span></a>
|
||||
<ul class="ul-4 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalizationusing-calcdate-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/internationalization/using-calcdate/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesinternationalizationusing-calcdate><span>Using Calcdate</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelineslocalizability><span>Localizability</span></a>
|
||||
<ul class="ul-4 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilitycaptionml-for-system-tables-li>
|
||||
|
|
@ -374,9 +336,7 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/use-text-constants/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityuse-text-constants><span>Use Text Constants</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityusing-optioncaptionml-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/localizability/using-optioncaptionml/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelineslocalizabilityusing-optioncaptionml><span>Using OptionCaptionML</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesreadability-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesreadability-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesreadability><span>Readability</span></a>
|
||||
<ul class="ul-4 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilitybegin-as-an-afterword-li>
|
||||
|
|
@ -443,9 +403,7 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/variable-naming/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilityvariable-naming><span>Variable Naming</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilityvariables-declarations-order-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/readability/variables-declarations-order/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesreadabilityvariables-declarations-order><span>Variables Declarations Order</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesux-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesux-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns3-cal-coding-guidelinesux><span>UX</span></a>
|
||||
<ul class="ul-4 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesuxactions-images-li>
|
||||
|
|
@ -456,11 +414,7 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/fielderror/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesuxfielderror><span>FIELDERROR</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns3-cal-coding-guidelinesuxmessage-and-error-li>
|
||||
<a href=/docs/navpatterns/3-cal-coding-guidelines/ux/message-and-error/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns3-cal-coding-guidelinesuxmessage-and-error><span>MESSAGE and ERROR</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns4-get-involved-li>
|
||||
</li></ul></li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docsnavpatterns4-get-involved-li>
|
||||
<a href=/docs/navpatterns/4-get-involved/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docsnavpatterns4-get-involved><span>(OLD) Get Involved</span></a>
|
||||
<ul class="ul-3 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns4-get-involvedcode-of-conduct-li>
|
||||
|
|
@ -469,13 +423,9 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/navpatterns/4-get-involved/patterns-authors/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns4-get-involvedpatterns-authors><span>Patterns Authors</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docsnavpatterns4-get-involvedtemplate-for-writing-nav-design-patterns-li>
|
||||
<a href=/docs/navpatterns/4-get-involved/template-for-writing-nav-design-patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatterns4-get-involvedtemplate-for-writing-nav-design-patterns><span>Template for writing Nav Design Patterns</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternsrelated-links-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child" id=m-docsnavpatternsrelated-links-li>
|
||||
<a href=/docs/navpatterns/related-links/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docsnavpatternsrelated-links><span>Related Links</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docscontributing-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child" id=m-docscontributing-li>
|
||||
<a href=/docs/contributing/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docscontributing><span>Contributing</span></a>
|
||||
<ul class="ul-2 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docscontributingformattingtips-li>
|
||||
|
|
@ -491,27 +441,14 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href=/docs/contributing/installhugo/manuallyonwindows11/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributinginstallhugomanuallyonwindows11><span>Manually on Windows 11</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docscontributinginstallhugousingpowershellonwindows11-li>
|
||||
<a href=/docs/contributing/installhugo/usingpowershellonwindows11/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributinginstallhugousingpowershellonwindows11><span>Powershell on Windows 11</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docscontributingtemplates-li>
|
||||
</li></ul></li><li class="td-sidebar-nav__section-title td-sidebar-nav__section with-child collapse" id=m-docscontributingtemplates-li>
|
||||
<a href=/docs/contributing/templates/ class="align-left pl-0 td-sidebar-link td-sidebar-link__section" id=m-docscontributingtemplates><span>Templates</span></a>
|
||||
<ul class="ul-3 foldable">
|
||||
<li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docscontributingtemplatespatterns-li>
|
||||
<a href=/docs/contributing/templates/patterns/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributingtemplatespatterns><span>Pattern Name</span></a>
|
||||
</li><li class="td-sidebar-nav__section-title td-sidebar-nav__section without-child collapse" id=m-docscontributingtemplatesbestpractice-li>
|
||||
<a href=/docs/contributing/templates/bestpractice/ class="align-left pl-0 td-sidebar-link td-sidebar-link__page" id=m-docscontributingtemplatesbestpractice><span>Title Here</span></a>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</li>
|
||||
</ul>
|
||||
</nav>
|
||||
</div>
|
||||
</aside>
|
||||
<aside class="d-none d-xl-block col-xl-2 td-sidebar-toc d-print-none">
|
||||
</li></ul></li></ul></li></ul></li></ul></nav></div></aside><aside class="d-none d-xl-block col-xl-2 td-sidebar-toc d-print-none">
|
||||
<div class="td-page-meta ml-2 pb-1 pt-2 mb-0">
|
||||
<a href=https://github.com/microsoft/alguidelines/tree/main/content/docs/NAVPatterns/patterns/multi-file-download/index.md class=td-page-meta--view target=_blank rel=noopener><i class="fa fa-file-alt fa-fw"></i> View page source</a>
|
||||
<a href=https://github.com/microsoft/alguidelines/edit/main/content/docs/NAVPatterns/patterns/multi-file-download/index.md class=td-page-meta--edit target=_blank rel=noopener><i class="fa fa-edit fa-fw"></i> Edit this page</a>
|
||||
|
|
@ -519,145 +456,64 @@ Description When generating reports that consists of multiple, and usually an un
|
|||
<a href="https://github.com/microsoft/alguidelines/issues/new?title=Multi-file%20Download" class=td-page-meta--issue target=_blank rel=noopener><i class="fab fa-github fa-fw"></i> Create Issue</a>
|
||||
<a href="https://github.com/microsoft/alguidelines/discussions?discussions_q=Multi-file%20Download" class=td-page-meta--issue target=_blank rel=noopener><i class="fab fa-github fa-fw"></i> Discussions</a>
|
||||
<a href=https://github.com/microsoft/alguidelines/issues/new class=td-page-meta--project-issue target=_blank rel=noopener><i class="fas fa-tasks fa-fw"></i> Create project issue</a>
|
||||
</div>
|
||||
<div class=td-toc><nav id=TableOfContents>
|
||||
</div><div class=td-toc><nav id=TableOfContents>
|
||||
<ul>
|
||||
<li><a href=#abstract>Abstract</a></li>
|
||||
<li><a href=#description>Description</a></li>
|
||||
<li><a href=#usage>Usage</a>
|
||||
<li><a href=#abstract>Abstract</a></li><li><a href=#description>Description</a></li><li><a href=#usage>Usage</a>
|
||||
<ul>
|
||||
<li></li>
|
||||
</ul>
|
||||
</li>
|
||||
<li><a href=#nav-usages>NAV Usages</a></li>
|
||||
<li><a href=#consequences>Consequences</a></li>
|
||||
<li><a href=#related-topics>Related Topics</a></li>
|
||||
<li><a href=#references>References</a></li>
|
||||
</ul>
|
||||
</nav></div>
|
||||
<div class="taxonomy taxonomy-terms-cloud taxo-tags">
|
||||
<h5 class=taxonomy-title>Tag Cloud</h5>
|
||||
<ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/al/ data-taxonomy-term=al><span class=taxonomy-label>AL</span><span class=taxonomy-count>29</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/api/ data-taxonomy-term=api><span class=taxonomy-label>API</span><span class=taxonomy-count>3</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/c/al/ data-taxonomy-term=c/al><span class=taxonomy-label>C/AL</span><span class=taxonomy-count>136</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/decoupling/ data-taxonomy-term=decoupling><span class=taxonomy-label>Decoupling</span><span class=taxonomy-count>2</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/extendability/ data-taxonomy-term=extendability><span class=taxonomy-label>Extendability</span><span class=taxonomy-count>3</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/interface/ data-taxonomy-term=interface><span class=taxonomy-label>Interface</span><span class=taxonomy-count>1</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/performance/ data-taxonomy-term=performance><span class=taxonomy-label>Performance</span><span class=taxonomy-count>2</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/readability/ data-taxonomy-term=readability><span class=taxonomy-label>Readability</span><span class=taxonomy-count>53</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/telemetry/ data-taxonomy-term=telemetry><span class=taxonomy-label>Telemetry</span><span class=taxonomy-count>1</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/testability/ data-taxonomy-term=testability><span class=taxonomy-label>Testability</span><span class=taxonomy-count>2</span></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="taxonomy taxonomy-terms-cloud taxo-categories">
|
||||
<h5 class=taxonomy-title>Categories</h5>
|
||||
<ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/best-practice/ data-taxonomy-term=best-practice><span class=taxonomy-label>Best Practice</span><span class=taxonomy-count>86</span></a></li>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span><span class=taxonomy-count>70</span></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
</aside>
|
||||
<main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main>
|
||||
<li></li></ul></li><li><a href=#nav-usages>NAV Usages</a></li><li><a href=#consequences>Consequences</a></li><li><a href=#related-topics>Related Topics</a></li><li><a href=#references>References</a></li></ul></nav></div><div class="taxonomy taxonomy-terms-cloud taxo-tags">
|
||||
<h5 class=taxonomy-title>Tag Cloud</h5><ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/al/ data-taxonomy-term=al><span class=taxonomy-label>AL</span><span class=taxonomy-count>30</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/api/ data-taxonomy-term=api><span class=taxonomy-label>API</span><span class=taxonomy-count>3</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/c/al/ data-taxonomy-term=c/al><span class=taxonomy-label>C/AL</span><span class=taxonomy-count>136</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/decoupling/ data-taxonomy-term=decoupling><span class=taxonomy-label>Decoupling</span><span class=taxonomy-count>2</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/extendability/ data-taxonomy-term=extendability><span class=taxonomy-label>Extendability</span><span class=taxonomy-count>3</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/interface/ data-taxonomy-term=interface><span class=taxonomy-label>Interface</span><span class=taxonomy-count>1</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/performance/ data-taxonomy-term=performance><span class=taxonomy-label>Performance</span><span class=taxonomy-count>2</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/readability/ data-taxonomy-term=readability><span class=taxonomy-label>Readability</span><span class=taxonomy-count>53</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/telemetry/ data-taxonomy-term=telemetry><span class=taxonomy-label>Telemetry</span><span class=taxonomy-count>1</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/tags/testability/ data-taxonomy-term=testability><span class=taxonomy-label>Testability</span><span class=taxonomy-count>2</span></a></li></ul></div><div class="taxonomy taxonomy-terms-cloud taxo-categories">
|
||||
<h5 class=taxonomy-title>Categories</h5><ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/best-practice/ data-taxonomy-term=best-practice><span class=taxonomy-label>Best Practice</span><span class=taxonomy-count>86</span></a></li><li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span><span class=taxonomy-count>71</span></a></li></ul></div></aside><main class="col-12 col-md-9 col-xl-8 pl-md-5" role=main>
|
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<nav aria-label=breadcrumb class=td-breadcrumbs>
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<li class=breadcrumb-item>
|
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<a href=https://alguidelines.dev/docs/>Docs</a>
|
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</li>
|
||||
<li class=breadcrumb-item>
|
||||
</li><li class=breadcrumb-item>
|
||||
<a href=https://alguidelines.dev/docs/navpatterns/>NAV Patterns Archive</a>
|
||||
</li>
|
||||
<li class=breadcrumb-item>
|
||||
</li><li class=breadcrumb-item>
|
||||
<a href=https://alguidelines.dev/docs/navpatterns/patterns/>1. Patterns</a>
|
||||
</li>
|
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<li class="breadcrumb-item active" aria-current=page>
|
||||
</li><li class="breadcrumb-item active" aria-current=page>
|
||||
<a href=https://alguidelines.dev/docs/navpatterns/patterns/multi-file-download/>Multi-file Download</a>
|
||||
</li>
|
||||
</ol>
|
||||
</nav>
|
||||
<div class=td-content>
|
||||
<h1>Multi-file Download</h1>
|
||||
<header class=article-meta>
|
||||
</li></ol></nav><div class=td-content>
|
||||
<h1>Multi-file Download</h1><header class=article-meta>
|
||||
<div class="taxonomy taxonomy-terms-article taxo-tags">
|
||||
<h5 class=taxonomy-title>Tags:</h5>
|
||||
<ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/c/al/ data-taxonomy-term=c/al><span class=taxonomy-label>C/AL</span></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
<div class="taxonomy taxonomy-terms-article taxo-categories">
|
||||
<h5 class=taxonomy-title>Categories:</h5>
|
||||
<ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span></a></li>
|
||||
</ul>
|
||||
</div>
|
||||
</header>
|
||||
<p><em>By Martin Dam at Microsoft Development Center Copenhagen</em></p>
|
||||
<h2 id=abstract>Abstract</h2>
|
||||
<p>The goal of this pattern is to enable the users to download multiple files as a zip file instead of downloading one by one. On the Web Client this is preferred way of delivering multiple files since it is one of the web patterns and we cannot use File Management code unit to place files silently on the machine.</p>
|
||||
<h2 id=description>Description</h2>
|
||||
<p>When generating reports that consists of multiple, and usually an unknown number of files, the developer will have to handle the download which also depends on the client the user is on. The problem is that the WinClient has access to the user’s file system, whereas the web client does not. Following web guidelines, and the fact that client side .NET is not available in Web client, you can’t initiate multiple downloads which requires the developer respond to the type of client. In some browsers it is possible to download files one-by-one in the Web client by using a confirm dialog, however this is a hack and should not be used.</p>
|
||||
<p>To solve this problem, a generic download mechanism is used that is client dependent event when multiple files need to be downloaded. For Web client the files are compressed using ZIP and for WinClient the files are downloaded directly to the file system.</p>
|
||||
<p>The pattern is usable for all objects that output multiple files and is available in both WinClient and Web client.</p>
|
||||
<h2 id=usage>Usage</h2>
|
||||
<p>The pattern consists of two steps: 1) Gathering the files and 2) downloading the file(s)</p>
|
||||
<p>For first step consists of a loop that goes through the files that needs to be downloaded. If it is on the Web client, the files are added to a ZIP archive server-side using a naming convention defined by the integration function GetSeriesFileName. This function takes a filename and number, and transforms it to unique names following a meaningful deterministic pattern e.g. prepend an integer before the file extension. The same function is used when the temporary files are created server side, so the files can be found deterministically later. This removes the need for storing filenames and consequently allows an arbitrary number of files. The second integration function: GetTotalNumberOfFiles, returns the total number of files generated during the data processing and makes the pattern able to handle an arbitrary number of files.</p>
|
||||
<p>The second step is the actually download of file(s). For the Web client this consists of closing the ZIP achieve and downloading via the standard download handler that works in the Web client. For the Win client, the files are saved directly to the client during the first step.</p>
|
||||
<p>Code 1: File loop shows an example implementation of this pattern. ServerFileName is generated at the beginning of the report/codeunit, and is the base for GetSeriesFilename. The file that is actually written to during data processing is stored in another variable which holds the output from GetSeriesFilename on the current file number. Note; the example code will only create a ZIP file if there in fact are multiple files to be downloaded.</p>
|
||||
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileName<span style=color:#f8f8f8;text-decoration:underline> </span>=<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>''</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>ERROR<span style=color:#ce5c00;font-weight:700>(</span>SupplyFileNameErr<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>ZipMultipleFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>AND</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>(</span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span>\><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#ce5c00;font-weight:700>) </span><span style=color:#204a87;font-weight:700>AND</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>IsWebClient<span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>Basename<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>ZipFileName<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>CreateZipArchiveObject<span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>FOR</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>TO</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>DO</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>AddFileToZipArchive<span style=color:#ce5c00;font-weight:700>(
|
||||
</span><span style=color:#ce5c00;font-weight:700> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>Basename<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>DownloadHandler<span style=color:#ce5c00;font-weight:700>(</span>ZipFileName<span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>STRSUBSTNO<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#4e9a06>'%1.zip'</span><span style=color:#000;font-weight:700>,</span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileNameWithoutExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>)))
|
||||
</span><span style=color:#ce5c00;font-weight:700></span><span style=color:#204a87;font-weight:700>END</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>ELSE</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>IsWebClient<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFile<span style=color:#f8f8f8;text-decoration:underline> </span>><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>ERROR<span style=color:#ce5c00;font-weight:700>(</span>MultipleFilesWebClientErr<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagementDownloadHandler<span style=color:#ce5c00;font-weight:700>(</span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>END</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>ELSE</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>FOR</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>TO</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>DO</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>DownloadToFile<span style=color:#ce5c00;font-weight:700>(</span>GetSeriesFilieName<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>END</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></code></pre></div><p><em>Code 1: File loop</em></p>
|
||||
<p>The following code is an example implementation of the GetSeriesFilename function. It needs to support the case where no directory is given, only a filename, in order to add files to the root of the ZIP archive. The example will add a file number right before the extension, e.g. C:\directory\file.txt will become C:\directory\file1.txt etc.</p>
|
||||
<div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al><span style=color:#204a87;font-weight:700>LOCAL</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Text</span><span style=color:#000;font-weight:700>;</span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Integer</span><span style=color:#ce5c00;font-weight:700>) </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Text</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>STRPOS<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>'\\'</span><span style=color:#ce5c00;font-weight:700>) </span><><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>0</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>Directory<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetDirectoryName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>'\\'</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>EXIT</span><span style=color:#ce5c00;font-weight:700>(</span>Directory<span style=color:#f8f8f8;text-decoration:underline> </span>+<span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetFileNameWithoutExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span>FORMAT<span style=color:#ce5c00;font-weight:700>(</span>FileNo<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>'.'</span><span style=color:#f8f8f8;text-decoration:underline> </span>+<span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></code></pre></div><h4 id=_code-2-getseriesfilename_><em>Code 2: GetSeriesFilename</em></h4>
|
||||
<p>The pattern depends on .NET library System.IO.Compression.ZipFile, which from NAV 2015 is implemented in Codeunit 419 (File management). It consists of three functions:</p>
|
||||
<ul>
|
||||
<li>CreateZipArchiveObject: Which creates a System.IO.Compression.ZipArchive on a server side file</li>
|
||||
<li>AddFileToZipArchive: Which adds a server side file to the archive using System.IO.Compression.ZipFileExtensions.CreateEntryFromFile(). This function allows to use arbitrary naming and does not require to create a server directory before creating the ZIP achieve.</li>
|
||||
<li>CloseZipArchive: Which simply closes the ZIP file and saves it to disk.</li>
|
||||
</ul>
|
||||
<p>The pattern is integrated into the report/codeunit in question by providing a filename field on the request page if it is on WinClient but hidden if it is in Web client. On the Web client, a meaningful default filename is used for the file to download, e.g. in Code 1, Filename is set by the user on the request page if it is WinClient, and set to a default value in Web client.</p>
|
||||
<h2 id=nav-usages>NAV Usages</h2>
|
||||
<p>This pattern is used by VAT Report and Blacklist communication in the Italian localization in NAV 2015. The ZIP archive functions are available on all localization from NAV 2015.</p>
|
||||
<h2 id=consequences>Consequences</h2>
|
||||
<p>This pattern can be used whenever you need to ZIP one or more files. The above example downloads the file, but it could have been transmitted, saved to a persistent storage etc. It could also be used to improve download speed between server and client where the WinClient would unzip the files locally and save individually to disk. This follows the normal procedure in NAV in the WinClient, which is to download files directly to disk, so a ZIP file should only be created when the user specifically needs it or the Web client is invoking the report/codeunit.</p>
|
||||
<h2 id=related-topics>Related Topics</h2>
|
||||
<p>File Management</p>
|
||||
<h2 id=references>References</h2>
|
||||
<p><a href=http://msdn.microsoft.com/en-us/library/vstudio/system.io.compression.zipfile>System.IO.Compression.ZipFile</a></p>
|
||||
<div class="text-muted mt-5 pt-3 border-top">
|
||||
<h5 class=taxonomy-title>Tags:</h5><ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/tags/c/al/ data-taxonomy-term=c/al><span class=taxonomy-label>C/AL</span></a></li></ul></div><div class="taxonomy taxonomy-terms-article taxo-categories">
|
||||
<h5 class=taxonomy-title>Categories:</h5><ul class=taxonomy-terms>
|
||||
<li><a class=taxonomy-term href=https://alguidelines.dev/categories/pattern/ data-taxonomy-term=pattern><span class=taxonomy-label>Pattern</span></a></li></ul></div></header><p><em>By Martin Dam at Microsoft Development Center Copenhagen</em></p><h2 id=abstract>Abstract</h2><p>The goal of this pattern is to enable the users to download multiple files as a zip file instead of downloading one by one. On the Web Client this is preferred way of delivering multiple files since it is one of the web patterns and we cannot use File Management code unit to place files silently on the machine.</p><h2 id=description>Description</h2><p>When generating reports that consists of multiple, and usually an unknown number of files, the developer will have to handle the download which also depends on the client the user is on. The problem is that the WinClient has access to the user’s file system, whereas the web client does not. Following web guidelines, and the fact that client side .NET is not available in Web client, you can’t initiate multiple downloads which requires the developer respond to the type of client. In some browsers it is possible to download files one-by-one in the Web client by using a confirm dialog, however this is a hack and should not be used.</p><p>To solve this problem, a generic download mechanism is used that is client dependent event when multiple files need to be downloaded. For Web client the files are compressed using ZIP and for WinClient the files are downloaded directly to the file system.</p><p>The pattern is usable for all objects that output multiple files and is available in both WinClient and Web client.</p><h2 id=usage>Usage</h2><p>The pattern consists of two steps: 1) Gathering the files and 2) downloading the file(s)</p><p>For first step consists of a loop that goes through the files that needs to be downloaded. If it is on the Web client, the files are added to a ZIP archive server-side using a naming convention defined by the integration function GetSeriesFileName. This function takes a filename and number, and transforms it to unique names following a meaningful deterministic pattern e.g. prepend an integer before the file extension. The same function is used when the temporary files are created server side, so the files can be found deterministically later. This removes the need for storing filenames and consequently allows an arbitrary number of files. The second integration function: GetTotalNumberOfFiles, returns the total number of files generated during the data processing and makes the pattern able to handle an arbitrary number of files.</p><p>The second step is the actually download of file(s). For the Web client this consists of closing the ZIP achieve and downloading via the standard download handler that works in the Web client. For the Win client, the files are saved directly to the client during the first step.</p><p>Code 1: File loop shows an example implementation of this pattern. ServerFileName is generated at the beginning of the report/codeunit, and is the base for GetSeriesFilename. The file that is actually written to during data processing is stored in another variable which holds the output from GetSeriesFilename on the current file number. Note; the example code will only create a ZIP file if there in fact are multiple files to be downloaded.</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al><span style=display:flex><span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileName<span style=color:#f8f8f8;text-decoration:underline> </span>=<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>''</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>ERROR<span style=color:#ce5c00;font-weight:700>(</span>SupplyFileNameErr<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>ZipMultipleFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>AND</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>(</span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span>\><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#ce5c00;font-weight:700>) </span><span style=color:#204a87;font-weight:700>AND</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>IsWebClient<span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>Basename<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>ZipFileName<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>CreateZipArchiveObject<span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>FOR</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>TO</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>DO</span><span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>AddFileToZipArchive<span style=color:#ce5c00;font-weight:700>(
|
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</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>Basename<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>DownloadHandler<span style=color:#ce5c00;font-weight:700>(</span>ZipFileName<span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>STRSUBSTNO<span style=color:#ce5c00;font-weight:700>(</span><span style=color:#4e9a06>'%1.zip'</span><span style=color:#000;font-weight:700>,</span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileNameWithoutExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>)))
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</span></span></span><span style=display:flex><span><span style=color:#ce5c00;font-weight:700></span><span style=color:#204a87;font-weight:700>END</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>ELSE</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>IsWebClient<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>BEGIN</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFile<span style=color:#f8f8f8;text-decoration:underline> </span>><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>ERROR<span style=color:#ce5c00;font-weight:700>(</span>MultipleFilesWebClientErr<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagementDownloadHandler<span style=color:#ce5c00;font-weight:700>(</span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>''</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>GetFileName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>END</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>ELSE</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>FOR</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>1</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>TO</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetTotalNumberOfFiles<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>DO</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileManagement<span style=color:#ce5c00;font-weight:700>.</span>DownloadToFile<span style=color:#ce5c00;font-weight:700>(</span>GetSeriesFilieName<span style=color:#ce5c00;font-weight:700>(</span>ServerFileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>)</span><span style=color:#000;font-weight:700>,</span><span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#000;font-weight:700>,</span>FileNo<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
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</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>END</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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</span></span></span></code></pre></div><p><em>Code 1: File loop</em></p><p>The following code is an example implementation of the GetSeriesFilename function. It needs to support the case where no directory is given, only a filename, in order to add files to the root of the ZIP archive. The example will add a file number right before the extension, e.g. C:\directory\file.txt will become C:\directory\file1.txt etc.</p><div class=highlight><pre tabindex=0 style=background-color:#f8f8f8;-moz-tab-size:4;-o-tab-size:4;tab-size:4><code class=language-al data-lang=al><span style=display:flex><span><span style=color:#204a87;font-weight:700>LOCAL</span><span style=color:#f8f8f8;text-decoration:underline> </span>GetSeriesFilename<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Text</span><span style=color:#000;font-weight:700>;</span>FileNo<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Integer</span><span style=color:#ce5c00;font-weight:700>) </span><span style=color:#000;font-weight:700>:</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>Text</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>IF</span><span style=color:#f8f8f8;text-decoration:underline> </span>STRPOS<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#000;font-weight:700>,</span><span style=color:#4e9a06>'\\'</span><span style=color:#ce5c00;font-weight:700>) </span><><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#0000cf;font-weight:700>0</span><span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#204a87;font-weight:700>THEN</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>Directory<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#ce5c00;font-weight:700>:=</span><span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetDirectoryName<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>'\\'</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
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||||
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline></span><span style=color:#204a87;font-weight:700>EXIT</span><span style=color:#ce5c00;font-weight:700>(</span>Directory<span style=color:#f8f8f8;text-decoration:underline> </span>+<span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetFileNameWithoutExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span>FORMAT<span style=color:#ce5c00;font-weight:700>(</span>FileNo<span style=color:#ce5c00;font-weight:700>) </span>+<span style=color:#f8f8f8;text-decoration:underline> </span><span style=color:#4e9a06>'.'</span><span style=color:#f8f8f8;text-decoration:underline> </span>+<span style=color:#f8f8f8;text-decoration:underline>
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||||
</span></span></span><span style=display:flex><span><span style=color:#f8f8f8;text-decoration:underline> </span>FileMgt<span style=color:#ce5c00;font-weight:700>.</span>GetExtension<span style=color:#ce5c00;font-weight:700>(</span>FileName<span style=color:#ce5c00;font-weight:700>))</span><span style=color:#000;font-weight:700>;</span><span style=color:#f8f8f8;text-decoration:underline>
|
||||
</span></span></span></code></pre></div><h4 id=_code-2-getseriesfilename_><em>Code 2: GetSeriesFilename</em></h4><p>The pattern depends on .NET library System.IO.Compression.ZipFile, which from NAV 2015 is implemented in Codeunit 419 (File management). It consists of three functions:</p><ul>
|
||||
<li>CreateZipArchiveObject: Which creates a System.IO.Compression.ZipArchive on a server side file</li><li>AddFileToZipArchive: Which adds a server side file to the archive using System.IO.Compression.ZipFileExtensions.CreateEntryFromFile(). This function allows to use arbitrary naming and does not require to create a server directory before creating the ZIP achieve.</li><li>CloseZipArchive: Which simply closes the ZIP file and saves it to disk.</li></ul><p>The pattern is integrated into the report/codeunit in question by providing a filename field on the request page if it is on WinClient but hidden if it is in Web client. On the Web client, a meaningful default filename is used for the file to download, e.g. in Code 1, Filename is set by the user on the request page if it is WinClient, and set to a default value in Web client.</p><h2 id=nav-usages>NAV Usages</h2><p>This pattern is used by VAT Report and Blacklist communication in the Italian localization in NAV 2015. The ZIP archive functions are available on all localization from NAV 2015.</p><h2 id=consequences>Consequences</h2><p>This pattern can be used whenever you need to ZIP one or more files. The above example downloads the file, but it could have been transmitted, saved to a persistent storage etc. It could also be used to improve download speed between server and client where the WinClient would unzip the files locally and save individually to disk. This follows the normal procedure in NAV in the WinClient, which is to download files directly to disk, so a ZIP file should only be created when the user specifically needs it or the Web client is invoking the report/codeunit.</p><h2 id=related-topics>Related Topics</h2><p>File Management</p><h2 id=references>References</h2><p><a href=http://msdn.microsoft.com/en-us/library/vstudio/system.io.compression.zipfile>System.IO.Compression.ZipFile</a></p><div class="text-muted mt-5 pt-3 border-top">
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Last modified February 24, 2022: <a href=https://github.com/microsoft/alguidelines/commit/5ee0436639455a35835c5ce88241d3fad662ee06>Added tags & categories + cleanup (5ee04366)</a>
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|
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<script src=https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js integrity=sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN crossorigin=anonymous></script>
|
||||
</div></div></div></footer></div><script src=https://cdn.jsdelivr.net/npm/popper.js@1.16.1/dist/umd/popper.min.js integrity=sha384-9/reFTGAW83EW2RDu2S0VKaIzap3H66lZH81PoYlFhbGU+6BZp6G7niu735Sk7lN crossorigin=anonymous></script>
|
||||
<script src=https://cdn.jsdelivr.net/npm/bootstrap@4.6.1/dist/js/bootstrap.min.js integrity="sha512-UR25UO94eTnCVwjbXozyeVd6ZqpaAE9naiEUBK/A+QDbfSTQFhPGj5lOR6d8tsgbBk84Ggb5A3EkjsOgPRPcKA==" crossorigin=anonymous></script>
|
||||
<script src=/js/tabpane-persist.js></script>
|
||||
<script src=/js/main.min.8ab8f81ff7e1454d30024cd6f956d4d341c3a97e2a673f988065f2ee4e147922.js integrity="sha256-irj4H/fhRU0wAkzW+VbU00HDqX4qZz+YgGXy7k4UeSI=" crossorigin=anonymous></script>
|
||||
</body>
|
||||
</html>
|
||||
<script src=/js/main.min.fc1551b8c1b40a6eaa08f3cb9c76f12ccd9aebc436cecdaf2341c890206d024a.js integrity="sha256-/BVRuMG0Cm6qCPPLnHbxLM2a68Q2zs2vI0HIkCBtAko=" crossorigin=anonymous></script>
|
||||
</body></html>
|
||||
Loading…
Add table
Add a link
Reference in a new issue