protected void btnAddProductCategory_Click(object sender, ImageClickEventArgs e)
{
Promotion p = GetCurrentPromotion();
ProductCategory q = (ProductCategory)GetCurrentQualification(p);
if (q == null)
{
return;
}
q.AddCategoryId(this.lstProductCategories.SelectedValue);
MyPage.MTApp.MarketingServices.Promotions.Update(p);
LoadProductCategoryEditor(q);
}