private void AttributeTree_ValidateLabelEdit(object sender, ValidateLabelEditEventArgs e)
{
if (string.IsNullOrEmpty(e.Label.Trim()))
{
e.Cancel = true;
}
}
protected override void OnAfterLabelEdit(NodeLabelEditEventArgs e)
{
this.LabelEdit = false;
e.CancelEdit = true;
if (e.Label == null)
{
return;
}
ValidateLabelEditEventArgs ea = new ValidateLabelEditEventArgs(e.Label);
OnValidateLabelEdit(ea);
if (ea.Cancel == true)
{
e.Node.Text = editedLabel;
this.LabelEdit = true;
e.Node.BeginEdit();
}
else
{
base.OnAfterLabelEdit(e);
}
}
protected virtual void OnValidateLabelEdit(ValidateLabelEditEventArgs e)
{
ValidateLabelEdit(this, e);
}