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How to validate text entered for a new node label in WinForms TreeViewAdv?

Platform: WinForms |
Control: TreeViewAdv |
Published Date: April 30, 2011 |
Last Revised Date: February 5, 2020

Validate the text entered for new label

The NodeEditorValidating event of the TreeViewAdv control to validate the node's label text entered by the user.

C#

private void treeViewAdv1_NodeEditorValidating(object sender, Syncfusion.Windows.Forms.Tools.TreeNodeAdvCancelableEditEventArgs e)
{
   if(e.Label.Length == 0)
   {
      //Cancel the label edit action, inform the user, and place the node in edit mode again.
      e.Cancel = true;
      MessageBox.Show("The label cannot be blank", "Node Label Edit");
      //To end editing mode,call:
      e.ContinueEditing = false;
   }
}

VB

Private Sub treeViewAdv1_NodeEditorValidating(ByVal sender As Object, ByVal e As Syncfusion.Windows.Forms.Tools.TreeNodeAdvCancelableEditEventArgs)
   If e.Label.Length = 0 Then
      ' Cancel the label edit action, inform the user, and place the node in edit mode again.
      e.Cancel = True
      MessageBox.Show("The label cannot be blank", "Node Label Edit")
      ' To end editing mode,call:
      e.ContinueEditing = false;
   End If
End Sub

 

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