public bool DeleteAttrValue(string valueid, string attrid, string operateIP, string operateID, string clientid, out int result)
 {
     var dal = new ProductsDAL();
     var bl = dal.DeleteAttrValue(valueid, clientid, out result);
     if (bl)
     {
         var model = GetProductAttrByID(attrid, clientid);
         var value = model.AttrValues.Where(m => m.ValueID == valueid).FirstOrDefault();
         model.AttrValues.Remove(value);
     }
     return bl;
 }