TreeViewNodeCancelEventArgs Class

Provides data for the BeforeCollapse and BeforeExpand events.

Namespace : DevExpress.Blazor

Assembly : DevExpress.Blazor.v25.2.dll

NuGet Package : DevExpress.Blazor

Declaration

public class TreeViewNodeCancelEventArgs :
    TreeViewNodeEventArgs

Related API Members

TreeViewNodeCancelEventArgs is the data class for the following events:

• DxTreeView.BeforeCollapse
• DxTreeView.BeforeExpand

Remarks

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

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

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

Inheritance

Object EventArgs TreeViewNodeEventArgs TreeViewNodeCancelEventArgs

See Also

TreeViewNodeCancelEventArgs Members

DevExpress.Blazor Namespace