protected void grvThuaDat_RowCommand(object sender, GridViewCommandEventArgs e)
        {
            if (e.CommandName == "Select")
            {
                NhapThongTinThuaDat_Visible(true);
                string _maThuaDat = e.CommandArgument.ToString();
                Session["ThaoTac"]   = ThaoTac.DangSua;
                Session["MaThuaDat"] = _maThuaDat;

                using (DMCWebEntities db = new DMCWebEntities())
                {
                    long maThuaDat      = long.Parse(_maThuaDat);
                    var  thuadatdangxet = (from td in db.tblThuaDatDuBis
                                           where td.MaThuaDat == maThuaDat
                                           select td).Single();
                    tblThuaDatDuBi thua = (tblThuaDatDuBi)thuadatdangxet;
                    lblMaThuaDat.Text  = thua.MaThuaDat.ToString();
                    lblMaHoSo.Text     = thua.MaHoSoKeKhai.ToString();
                    txtToBanDo.Text    = thua.ToBanDo;
                    txtSoThua.Text     = thua.SoThua;
                    txtDiaChi.Text     = thua.DiaChi;
                    txtDienTich.Text   = thua.DienTich;
                    txtDTSDChung.Text  = thua.SuDungChung;
                    txtDTSDRieng.Text  = thua.SuDungRieng;
                    txtMucDich.Text    = thua.MucDichSuDung;
                    txtThoiHan.Text    = thua.ThoiHanSuDung;
                    txtNgayBatDau.Text = thua.NgayBatDauSuDung.ToString();

                    drHanChe.SelectedValue       = thua.CoHanCheSuDung.ToString().ToLower();
                    txtHanChe.Text               = thua.NoiDungHanCheSuDung;
                    drLoaiNguonGoc.SelectedValue = thua.LoaiNguonGocSuDung;
                }
            }
        }
        public bool XoaThuaDatDuBi(string MaThuaDat)
        {
            try
            {
                long           _maThuaDat    = long.Parse(MaThuaDat);
                tblThuaDatDuBi thuadatcanxoa = db.tblThuaDatDuBis.Single(td => td.MaThuaDat == _maThuaDat);
                db.tblThuaDatDuBis.Remove(thuadatcanxoa);

                db.SaveChanges();
                return(true);
            }
            catch (Exception ex)
            {
                return(false);
            }
        }
        public bool SuaThuaDatDuBi(string MaThuaDat, string MaHoSo, string ToBanDo, string SoThua, string DiaChi, string DienTich, string SuDungChung, string SuDungRieng, string NguonGoc, string MucDich, string CoHanChe, string HanChe, string SuDungTuNgay, string ThoiHan)
        {
            try
            {
                bool _coHanChe = false;
                if (CoHanChe.Trim().ToLower() == "true")
                {
                    _coHanChe = true;
                }
                else
                {
                    _coHanChe = false;
                }



                long           _maThuaDat    = long.Parse(MaThuaDat);
                tblThuaDatDuBi thuadatcansua = db.tblThuaDatDuBis.Single(td => td.MaThuaDat == _maThuaDat);

                thuadatcansua.MaHoSoKeKhai        = Convert.ToInt32(MaHoSo);
                thuadatcansua.ToBanDo             = ToBanDo;
                thuadatcansua.SoThua              = SoThua;
                thuadatcansua.DiaChi              = DiaChi;
                thuadatcansua.DienTich            = DienTich;
                thuadatcansua.SuDungChung         = SuDungChung;
                thuadatcansua.SuDungRieng         = SuDungRieng;
                thuadatcansua.LoaiNguonGocSuDung  = NguonGoc;
                thuadatcansua.MucDichSuDung       = MucDich;
                thuadatcansua.CoHanCheSuDung      = _coHanChe;
                thuadatcansua.NoiDungHanCheSuDung = HanChe;
                thuadatcansua.NgayBatDauSuDung    = Convert.ToDateTime(SuDungTuNgay);
                thuadatcansua.ThoiHanSuDung       = ThoiHan;
                db.SaveChanges();
                return(true);
            }
            catch (Exception ex)
            {
                return(false);
            }
        }
        public bool ThemThuaDatDuBi(string MaHoSo, string ToBanDo, string SoThua, string DiaChi, string DienTich, string SuDungChung, string SuDungRieng, string NguonGoc, string MucDich, string CoHanChe, string HanChe, string SuDungTuNgay, string ThoiHan)
        {
            try
            {
                bool _coHanChe = false;
                if (CoHanChe.Trim().ToLower() == "true")
                {
                    _coHanChe = true;
                }
                else
                {
                    _coHanChe = false;
                }

                tblThuaDatDuBi thuadatmoi = new tblThuaDatDuBi();
                thuadatmoi.MaHoSoKeKhai        = Convert.ToInt32(MaHoSo);
                thuadatmoi.ToBanDo             = ToBanDo;
                thuadatmoi.SoThua              = SoThua;
                thuadatmoi.DiaChi              = DiaChi;
                thuadatmoi.DienTich            = DienTich;
                thuadatmoi.SuDungChung         = SuDungChung;
                thuadatmoi.SuDungRieng         = SuDungRieng;
                thuadatmoi.LoaiNguonGocSuDung  = NguonGoc;
                thuadatmoi.MucDichSuDung       = MucDich;
                thuadatmoi.CoHanCheSuDung      = _coHanChe;
                thuadatmoi.NoiDungHanCheSuDung = HanChe;
                thuadatmoi.NgayBatDauSuDung    = Convert.ToDateTime(SuDungTuNgay);
                thuadatmoi.ThoiHanSuDung       = ThoiHan;

                db.tblThuaDatDuBis.Add(thuadatmoi);
                db.SaveChanges();
                return(true);
            }
            catch (Exception ex)
            {
                return(false);
            }
        }