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Cascading not working in combobox - PowerApps ( Canvas App )

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Posted on by MP0211

I have Canvas app and using EDIT/Display form with combo box feature inside data card. I have category and sub-category combo boxes. I want a cascading and reverse cascading feature so that based on category it will list down sub categories and vice versa

It is currently working only on single selection but when selecting multiple categories its only list down sub-category for the first selected category. how to solve this.

DataSource = Sharepoint LIst

Combo box Properties : AllowMultipleSelect= true and AllowSearching = True.

1. Problem Statement: Multi-select cascading filter in form data cards only filters by first selected item, not union of all selected items
2. What Doesn't Work: The same logic not working in gallery filters (cmbExpertise and cmbSubCategory)
3. What Doesn't Work: Same logic in form data cards (Category and Area of Interest)
4. Sample Formula That Fails: Filter( 'Data Source Areas of expertise', !IsBlank( LookUp( varSelectedCategories, Value = Title ) ) )
5. Debug Evidence: Filter returns correct count (34) in test label, but ComboBox Items only shows subset (16)

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Vish WR 1,109 on at

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@MP-21041451-0

ComboBox inside a form data card doesn’t fully respect multi-select filter logic the same way a gallery does,

Try

Filter(
'Data Source Areas of expertise',
Title in varSelectedCategories.Value
)

Vishnu WR

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Please ✅ Does this answer your question if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider answering Yes to Was this reply helpful? or give it a Like ♥

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MP0211 14 on at

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@Vish_WR

- The suggested Title in varSelectedCategories.Value works in the filter (returns 34 - expected result)
- But ComboBox in form data card only displays 16 items ( showing values only for first selected category )
- This appears to be a ComboBox refresh bug in form context. Is there known workaround for forcing ComboBox to display all filtered result

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Vish WR 1,109 on at

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@MP0211

Try to have collection as an intermediate layer. Instead of binding the ComboBox directly to a filtered data source, you first store the fully filtered results (based on all selected categories) into a collection. Then, bind the ComboBox to that collectio

Vishnu WR

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Please ✅ Does this answer your question if my post helped you solve your issue. This will help others find it more readily. It also closes the item. If the content was useful in other ways, please consider answering Yes to Was this reply helpful? or give it a Like ♥

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MP0211 14 on at

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@Vish WR

Thank You. This approach worked.

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MS.Ragavendar 6,562 Super User 2026 Season 1 on at

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@MP0211, I believe the suggestion from @Vish WR worked for you. When it resolved your issue please accept the answer it will help to close the thread and also help others in future if they face similar issue.

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