Validation before Insert in Radgrid

[Said]

Hi,
i want to validate my radgrid on server side when the user click the "Add new record" btn,
if existing data are valid continue and show the editform else show error message and cancel insert operation,
so, my question is : what is the event i should use.
thanks.

[Said]

so i found a solution :
the event was OnItemCommand and the command Name = RadGrid.InitInsertCommandName
the code is :

protected void RadGrid1_ItemCommand(object source, GridCommandEventArgs e)
        {
            if (e.CommandName == RadGrid.InitInsertCommandName)
            {
                if (e.Item.OwnerTableView.Name == "ParentGrid")
                {
                    if(!this.isValid())//My Custom Validation
                        e.Canceled = true;
                }
            }
        }

thanks