bcquality/microsoft/knowledge/ui/updatepropagation-both-refreshes-main-page.md
Jesper Schulz-Wedde 56b80e6dcf Add knowledge-backed AL development
Add read-only planning and repository-changing development skills so BCQuality
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add development and BCApps-shaped guidance evaluation fixtures.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>
Copilot-Session: 638b66d2-9f06-4f60-8781-808709e1485c
2026-09-04 12:53:54 +02:00

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---
bc-version: [all]
domain: ui
keywords: [updatepropagation, page-part, subpage, main-page, refresh, flowfield, document-lines]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Use `UpdatePropagation = Both` when line edits must refresh the main page
## Description
A page part does not automatically refresh its parent page when the subpage changes. `UpdatePropagation = Subpage` updates only the part; `Both` also refreshes the main page. Without `Both`, header totals, FlowFields, and FactBoxes that depend on edited lines can remain stale until another user action refreshes the page.
## Best Practice
Set `UpdatePropagation = Both` on a part when edits in that subpage must immediately update values rendered by the main page. Leave propagation at `Subpage` when the parent has no dependent presentation to avoid unnecessary refreshes.
See sample: `updatepropagation-both-refreshes-main-page.good.al`.
## Anti Pattern
Displaying a line-dependent total on the main page while the editable lines part updates only itself. The persisted values can be correct while the parent page continues to show an old total.
See sample: `updatepropagation-both-refreshes-main-page.bad.al`.
## Reference
[Set different control properties](https://learn.microsoft.com/en-us/training/modules/work-with-pages/8-controls)