CancelableNodeEventArgs Class

Event parameters used for events that takes a node and are Cancelable.
Public Class CancelableNodeEventArgs 
   Inherits System.ComponentModel.CancelEventArgs
public class CancelableNodeEventArgs : System.ComponentModel.CancelEventArgs 
The following sample code illustrates some of the information available in the BeforeActivate event.

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

Imports Infragistics.Win.UltraWinTree

Private Sub ultraTree1_BeforeActivate(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.CancelableNodeEventArgs) Handles ultraTree1.BeforeActivate

    Dim sb As New System.Text.StringBuilder()

    If e.TreeNode Is Nothing Then
        sb.Append("No node is being activated.")
        sb.Append("Node: ")
        sb.Append(" is being activated.")
    End If


    ' Note : This action can be canceled by the following line of code.
    'e.Cancel = True

End Sub
using System.Diagnostics;
using Infragistics.Win.UltraWinTree;

private void ultraTree1_BeforeActivate(object sender, Infragistics.Win.UltraWinTree.CancelableNodeEventArgs e)

	System.Text.StringBuilder sb = new System.Text.StringBuilder();

	if ( e.TreeNode == null )
		sb.Append("No node is being activated.");
		sb.Append("Node: ");
		sb.Append(" is being activated.");

	Debug.WriteLine( sb.ToString() );

	// Note : This action can be canceled by the following line of code.
	//e.Cancel = true;


Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also