[Windows] Fixed CollectionView throws NRE when value of IsGrouped property is changed to false #27331
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karthikraja-arumugam
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- src/Controls/tests/TestCases.HostApp/Issues/Issue17864.xaml: Language not supported
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src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue17864.cs:22
- Add a check to ensure that the CollectionView is correctly updated after the IsGrouped property changes.
App.WaitForElement(CollectionView);
| public void CollectionViewShouldNotCrashWhenIsGroupedChanges() | ||
| { | ||
| App.WaitForElement(CollectionView); | ||
| App.Tap("Button"); |
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Ensure that the AutomationId for 'Button' is unique and not reused, or WaitForElement will fail to find the correct element.
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Issue Details
NullReference exception is thrown when disabling IsGrouped at runtime.
Root Cause
The value passed as the itemsource when creating a groupItemsList is not IEnumerable. This causes the value to be set as null.
Description of Change
Ensured the value is of type IEnumerable and pass it to Create method of TemplatedItemSourceFactory to avoid null reference exceptions.
Validated the behaviour in the following platforms
Issues Fixed
Fixes #17864
Output
Before.mp4
After.mp4