TreeViewNodeCancelEventArgs Class

Provides data for the BeforeCollapse and BeforeExpand events.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.1.dll

Declaration

public class TreeViewNodeCancelEventArgs :
    TreeViewNodeEventArgs

Related API Members

TreeViewNodeCancelEventArgs is the data class for the following events:

• DxTreeView.BeforeCollapse
• DxTreeView.BeforeExpand

Remarks

The code sample below demonstrates how to prohibit 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