/// <summary>
        /// name: Quynh
        /// content: Chinh sua thong tin nhan vien
        /// </summary>
        public void Update(eNhanVien entity)
        {
            NhanVien nv = db.NhanViens.Where(t => t.maNhanVien.Equals(entity.manhanVien)).SingleOrDefault();

            nv.hoTen         = entity.hoTen;
            nv.gioiTinh      = entity.gioiTinh;
            nv.dienThoai     = entity.dienThoai;
            nv.email         = entity.email;
            nv.ngayVaolam    = entity.ngayVaolam;
            nv.soCMND        = entity.soCMND;
            nv.soBaoHiemXH   = entity.soBaoHiemXH;
            nv.viTriCongViec = entity.viTriCongViec;
            nv.hinhAnh       = entity.hinhAnh;

            db.SubmitChanges();

            DiaChi dc = db.DiaChis.Where(t => t.maDiaChi.Equals(entity.diaChi.maDiaChi)).SingleOrDefault();

            dc.soNha     = entity.diaChi.soNha;
            dc.phuongXa  = entity.diaChi.phuongXa;
            dc.quanHuyen = entity.diaChi.quanHuyen;
            dc.thanhPho  = entity.diaChi.thanhPho;

            db.SubmitChanges();
        }
 /// <summary>
 /// name: Quynh
 /// content: them mot dia moi
 /// </summary>
 public bool themDiaChi(eDiaChi diaChi)
 {
     try
     {
         DiaChi dc = new DiaChi();
         dc.maDiaChi  = diaChi.maDiaChi;
         dc.soNha     = diaChi.soNha;
         dc.quanHuyen = diaChi.quanHuyen;
         dc.thanhPho  = diaChi.thanhPho;
         dc.phuongXa  = diaChi.phuongXa;
         db.DiaChis.InsertOnSubmit(dc);
         db.SubmitChanges();
         return(true);
     }
     catch (Exception)
     {
         return(false);
     }
 }
        /// <summary>
        /// name: Quynh
        /// content: Chinh sua thong tin cua du an trong co so du lieu
        /// </summary>
        public void Update(eDuAn entity)
        {
            DuAn da = db.DuAns.Where(t => t.maDuAn.Equals(entity.MaDuAn)).SingleOrDefault();

            da.tenDuAn         = entity.TenDuAn;
            da.ngayBatDau      = entity.NgayBatDau;
            da.ngayKetThuc     = entity.NgayKetThuc;
            da.tienDoHoanThanh = entity.TienDo;
            da.trangThai       = entity.TrangThai;

            db.SubmitChanges();

            DiaChi dc = db.DiaChis.Where(t => t.maDiaChi.Equals(entity.DiaChi.maDiaChi)).SingleOrDefault();

            dc.soNha     = entity.DiaChi.soNha;
            dc.phuongXa  = entity.DiaChi.phuongXa;
            dc.quanHuyen = entity.DiaChi.quanHuyen;
            dc.thanhPho  = entity.DiaChi.thanhPho;

            db.SubmitChanges();
        }