SelectedItem not maintained in ComboBox when property was bound using CommunityToolkit.WinUI.FrameworkElementExtensions #4997
Labels
bug 🐛
An unexpected issue that highlights incorrect behavior
Describe the bug
We are using the
FrameworkElementExtension.Ancestor
for theComboBox.ItemsSource
binding. When we unload the ComboBox, the binding remains active, causing the SelectionChanged event to trigger after the Unloaded event. As a result, the SelectedItem is not maintained in our application. This issue specifically occurs when using the FrameworkElementExtension from the CommunityToolKit.WinUI.Extensions package.Sample - ComboBox_BindingIssue.zip
Unnecessary calls for SelectionChanged event after Unloaded event triggers - UnnecessaryCallForSelectionChanged.zip
Regression
No response
Reproducible in sample app?
Steps to reproduce
Expected behavior
Expected behavior - TextBox Text needs to be remains the same.
Observed behavior - TextBox Text changes to null.
Screenshots
Output_Video.mp4
Windows Build Number
Other Windows Build number
No response
App minimum and target SDK version
Other SDK version
No response
Visual Studio Version
2022
Visual Studio Build Number
17.10.1
Device form factor
Desktop
Nuget packages
CommunityToolKit.WinUI.Extensions - version - 8.0.240109
CommunityToolKit.Mvvm - version - 8.2.2
Microsoft.Windows.SDK.BuildTools - version - 10.0.22621.765
MicrosoftWindowsSDKApp - version - 1.5.240607001
Additional context
No response
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