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TreeViewNodeCancelEventArgs Class

Provides data for the BeforeCollapse and BeforeExpand events.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
public class TreeViewNodeCancelEventArgs :
    TreeViewNodeEventArgs

#Remarks

The following code snippet prohibits root-level nodes from collapsing.

Razor
<DxTreeView BeforeCollapse="@BeforeCollapse">
    ...
</DxTreeView>

@code  {
    void BeforeCollapse(TreeViewNodeCancelEventArgs e) {
        if (e.NodeInfo.Level == 0) e.Cancel = true; 
    }
}

#Inheritance

Object
EventArgs
TreeViewNodeEventArgs
TreeViewNodeCancelEventArgs
See Also