public ActionResult PhanCong([Bind(Include = "Id,idNhiemVu,idNhanVien,idDoanKhach")] NhanVienTheoDoan nhanVien)
        {
            if (ModelState.IsValid)
            {
                String error = bus.PhanCong(nhanVien);
                if (error != null)
                {
                    ViewBag.error       = error;
                    ViewBag.idNhiemVu   = new SelectList(db.NhiemVus, "Id", "TenNhiemVu");
                    ViewBag.idNhanVien  = new SelectList(db.NhanViens, "Id", "TenNhanVien");
                    ViewBag.idDoanKhach = new SelectList(db.DoanKhaches, "Id", "TenGoi");
                    return(View(nhanVien));
                }
                return(RedirectToAction("../DoanKhaches/Details/" + nhanVien.idDoanKhach));
            }

            return(View(nhanVien));
        }