| -api-id | -api-type |
|---|---|
E:Windows.UI.Xaml.Controls.TreeView.Expanding |
winrt event |
Occurs when a node in the tree starts to expand.
Equivalent WinUI 2 API for UWP: Microsoft.UI.Xaml.Controls.TreeView.Expanding (for WinUI in the Windows App SDK, see the Windows App SDK namespaces).