public string CartItemUpdate(int?CustomerId, int ProductId, int Type)
{
List <Nullable <int> > obj = new List <Nullable <int> >();
using (var entities = new SedapExpressEntities())
{
obj = entities.CartItemNumberUpdate(CustomerId, ProductId, Type).ToList <Nullable <int> >();
}
return(JsonConvert.SerializeObject(obj));
}