private static ImportBill ConvertImportBill(ServiceImportBill.import_bill item)
 {
     ImportBill import = new ImportBill();
     import.id = item.id;
     import.date = item.date;
     import.id_manufacturer = item.id_manufacturer;
     import.total_price = item.total_price;
     import.name_manufacturer = sManu.GetManufacturerById(item.id_manufacturer).name;
     return import;
 }
 public static void Update(ServiceImportBill.import_bill dnh)
 {
     sImportBill.UpdateImportBill(dnh);
 }
 //public static int GetMaDNH()
 //{
 //    //QLBHEntities db = new QLBHEntities();
 //    //return (db.DonNhapHangs.AsNoTracking().OrderByDescending(i => i.MaDNH).First().MaDNH+1);
 //}
 public static void Insert(ServiceImportBill.import_bill dnh)
 {
     sImportBill.AddImportBill(dnh);
 }