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

Event parameters used by the UltraTree.BeforeCheck event.

Object Model


Syntax

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

Example

The following sample code illustrates some of the information available in the BeforeCheck 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_BeforeCheck(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinTree.BeforeCheckEventArgs) Handles ultraTree1.BeforeCheck

        Dim sb As New System.Text.StringBuilder()

        sb.Append("Node: ")
        sb.Append(e.TreeNode.Key)
        sb.Append(" check state is about to change from ")
        sb.Append(e.TreeNode.CheckedState)
        sb.Append(" to ")
        sb.Append(e.NewValue)

        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_BeforeCheck(object sender, Infragistics.Win.UltraWinTree.BeforeCheckEventArgs e)
       {

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

           sb.Append("Node: ");
           sb.Append(e.TreeNode.Key);
           sb.Append(" check state is about to change from ");
           sb.Append(e.TreeNode.CheckedState);
           sb.Append(" to ");
           sb.Append(e.NewValue);

           Debug.WriteLine( sb.ToString() );
       
           // Note : This action can be canceled by the following line of code.
           //e.Cancel = true;

       }

See Also