Unfortunately I'm using an older version of the winforms controls, but just in case someone can help..
I'm validating in the property view, but I can't get an error message to show. I even tried to set Description until I worked out the error message issue, but that doesn't show either. (I have the help panel showing).
I have a delegate doing the property validation, which returns me an error string if invalid. The string is being returned correctly. See below for my code; I've only changed a name or two.
private void OnValidating(object sender, PropertyValidatingEventArgs e)
{
var item = e.Item as PropertyGridItem;
if (item == null) return;
if (_validateProperty != null)
{
var item = GetViewModelItem(sender);
var error = "";
var valid = _validateProperty(item, e.Item.Name, e.NewValue as string, out error);
if (!valid)
{
// TODO: error message not showing
item.ErrorMessage = error;
}
e.Cancel = !valid;
}
}