protected void ManRowDeleting(object sender, GridViewDeleteEventArgs e)
 {
     if (e != null && Convert.ToInt32(e.Values["Number of Models"], CultureInfo.InvariantCulture) != 0)
     {
         e.Cancel = true;
     }
     Manufacturer.FlushCache();
 }
        protected void ManRowUpdating(object sender, GridViewUpdateEventArgs e)
        {
            if (e == null)
            {
                throw new ArgumentNullException(nameof(e));
            }
            if (sender == null)
            {
                throw new ArgumentNullException(nameof(sender));
            }

            GridView        gv  = (GridView)sender;
            RadioButtonList rbl = (RadioButtonList)gv.Rows[e.RowIndex].FindControl("rblDefaultSim");

            sqlDSManufacturers.UpdateParameters["DefaultSim"].DefaultValue = rbl.SelectedValue;
            sqlDSManufacturers.Update();
            gv.EditIndex = -1;

            Manufacturer.FlushCache();
        }