# TreeViewControl.ValidateCellValue event

Occurs when a node value is validated.

```csharp
public event EventHandler<TreeViewValidateCellValueEventArgs>? ValidateCellValue;
```

## See Also

* class [TreeViewValidateCellValueEventArgs](../TreeViewValidateCellValueEventArgs.md)
* class [TreeViewControl](../TreeViewControl.md)
* namespace [Eremex.AvaloniaUI.Controls.TreeList](../index.md)

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