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optimistic TrackValue check, supporting not anymore connected columns #6553

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Merged
merged 1 commit into from
Apr 27, 2023
Merged

optimistic TrackValue check, supporting not anymore connected columns #6553

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19 changes: 11 additions & 8 deletions src/Microsoft.DotNet.Wpf/src/PresentationFramework/System/Windows/Controls/DataGrid.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -6886,17 +6886,20 @@ public void TrackValue()
if (AutomationPeer.ListenerExists(AutomationEvents.PropertyChanged))
{
DataGridColumn column = (_cell != null) ? _cell.Column : _column;
DataGridAutomationPeer peer = DataGridAutomationPeer.FromElement(column.DataGridOwner) as DataGridAutomationPeer;
if (peer != null)
if (column.DataGridOwner != null)
{
object item = (_cell != null) ? _cell.DataContext : _item;
DataGridItemAutomationPeer dataGridItemAutomationPeer = peer.FindOrCreateItemAutomationPeer(item) as DataGridItemAutomationPeer;
if (dataGridItemAutomationPeer != null)
DataGridAutomationPeer peer = DataGridAutomationPeer.FromElement(column.DataGridOwner) as DataGridAutomationPeer;
if (peer != null)
{
DataGridCellItemAutomationPeer cellPeer = dataGridItemAutomationPeer.GetOrCreateCellItemPeer(column);
if (cellPeer != null)
object item = (_cell != null) ? _cell.DataContext : _item;
DataGridItemAutomationPeer dataGridItemAutomationPeer = peer.FindOrCreateItemAutomationPeer(item) as DataGridItemAutomationPeer;
if (dataGridItemAutomationPeer != null)
{
cellPeer.RaisePropertyChangedEvent(ValuePatternIdentifiers.ValueProperty, _value, newValue);
DataGridCellItemAutomationPeer cellPeer = dataGridItemAutomationPeer.GetOrCreateCellItemPeer(column);
if (cellPeer != null)
{
cellPeer.RaisePropertyChangedEvent(ValuePatternIdentifiers.ValueProperty, _value, newValue);
}
}
}
}
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