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Fix ContextDropBehavior crash when ContextDropBehavior.DataFormat is not present #71

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Merged
merged 1 commit into from
May 16, 2025
Merged

Fix ContextDropBehavior crash when ContextDropBehavior.DataFormat is not present #71

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12 changes: 9 additions & 3 deletions src/Avalonia.Xaml.Interactions.DragAndDrop/ContextDropBehavior.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -73,7 +73,9 @@ protected override void OnDetachedFromVisualTree()

private void DragEnter(object? sender, DragEventArgs e)
{
var sourceContext = e.Data.Get(ContextDropBehavior.DataFormat);
var sourceContext = e.Data.Contains(ContextDropBehavior.DataFormat)
? e.Data.Get(ContextDropBehavior.DataFormat)
: null;
var targetContext = Context ?? AssociatedObject?.DataContext;
Handler?.Enter(sender, e, sourceContext, targetContext);
}
Expand All @@ -85,14 +87,18 @@ private void DragLeave(object? sender, RoutedEventArgs e)

private void DragOver(object? sender, DragEventArgs e)
{
var sourceContext = e.Data.Get(ContextDropBehavior.DataFormat);
var sourceContext = e.Data.Contains(ContextDropBehavior.DataFormat)
? e.Data.Get(ContextDropBehavior.DataFormat)
: null;
var targetContext = Context ?? AssociatedObject?.DataContext;
Handler?.Over(sender, e, sourceContext, targetContext);
}

private void Drop(object? sender, DragEventArgs e)
{
var sourceContext = e.Data.Get(ContextDropBehavior.DataFormat);
var sourceContext = e.Data.Contains(ContextDropBehavior.DataFormat)
? e.Data.Get(ContextDropBehavior.DataFormat)
: null;
var targetContext = Context ?? AssociatedObject?.DataContext;
Handler?.Drop(sender, e, sourceContext, targetContext);
}
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