Preventing the Edit of Specific Nodes

[Paul]

I am trying to prevent the editing of a certain node with this event handler:

private void radTreeView_Editing(object sender, TreeNodeEditingEventArgs e)
{
    if (e.Node.Text == "abc")
    {
        e.Node.CancelEdit();
    }
}

It appears that I am missing something because the node text is still editable and this exception is thrown:

System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.WinControls.UI.RadTreeViewElement.BeginEdit()
   at Telerik.WinControls.UI.RadTreeViewElement.mouseUpTimer_Tick(Object sender, EventArgs e)
   at System.Windows.Forms.Timer.OnTick(EventArgs e)
   at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

Any suggestions?

[Stefan]

Hi Paul,

Thank you for writing.

You can use the Cancel property of the event arguments to cancel the editing operation:

void radTreeView1_Editing(object sender, TreeNodeEditingEventArgs e)
{
    if (e.Node.Text == "Node2")
    {
        e.Cancel = true;
    }
}

I hope this helps.
 
All the best,

Stefan

the Telerik team

[Paul]

Works great, thanks.