public string AddAttrValue(string valueName, string attrid, string operateid) { var valueid = Guid.NewGuid().ToString().ToLower(); var dal = new ProductsDAL(); if (dal.AddAttrValue(valueid, valueName, attrid, operateid)) { var model = GetAttrByID(attrid); model.AttrValues.Add(new AttrValue() { ValueID = valueid, ValueName = valueName, Status = 1, AttrID = attrid, CreateTime = DateTime.Now }); return valueid; } return string.Empty; }