or
private void GridCommsEqp_OnCellValidating(object sender, GridViewCellValidatingEventArgs e) { switch (e.Cell.Column.UniqueName) { case "SSN": if (e.NewValue.ToString().Length > 30) { e.IsValid = false; e.ErrorMessage = string.Format("{0} must not be longer than 30 characters. " + "Current length: {1}", e.Cell.Column.Header, e.NewValue.ToString().Length); } break; case "OfficialDesc": case "CommonDesc": . . . }