Infragistics2.Win.UltraWinTree.v8.1
CancelableNodeEventArgs Class
See Also  Members   Example 
Infragistics.Win.UltraWinTree Namespace : CancelableNodeEventArgs Class

Event parameters used for events that takes a node and are Cancelable.

Object Model


Syntax

Visual Basic (Declaration) 
Public Class CancelableNodeEventArgs 
   Inherits CancelEventArgs
C# 
public class CancelableNodeEventArgs : CancelEventArgs

Example

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.

Visual BasicCopy Code
    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.")
        Else
            sb.Append("Node: ")
            sb.Append(e.TreeNode.Key)
            sb.Append(" is being activated.")
        End If

        Debug.WriteLine(sb.ToString())

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

    End Sub

C#Copy Code
       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.");
           }
           else
           {
               sb.Append("Node: ");
               sb.Append(e.TreeNode.Key);
               sb.Append(" is being activated.");
           }

           Debug.WriteLine( sb.ToString() );

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

       }

See Also