# TreeListControl.CellValueChanging event

Occurs while a cell value is being changed before it is posted to the data source.

```csharp
public event EventHandler<TreeListCellValueChangedEventArgs> CellValueChanging;
```

## See Also

* class [TreeListCellValueChangedEventArgs](../TreeListCellValueChangedEventArgs.md)
* class [TreeListControl](../TreeListControl.md)
* namespace [Eremex.AvaloniaUI.Controls.TreeList](../index.md)

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