protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
string dataKey = GridView1.DataKeys[e.RowIndex].Value.ToString();
string name = (GridView1.Rows[e.RowIndex].Cells[2].Controls[0] as TextBox).Text;
string hanhTrinh = (GridView1.Rows[e.RowIndex].Cells[3].Controls[0] as TextBox).Text;
int soNgay = Convert.ToInt16((GridView1.Rows[e.RowIndex].Cells[4].Controls[0] as TextBox).Text);
double giaDiLai =Convert.ToDouble((GridView1.Rows[e.RowIndex].Cells[5].Controls[0] as TextBox).Text);
double giaAno = Convert.ToDouble((GridView1.Rows[e.RowIndex].Cells[6].Controls[0] as TextBox).Text);
string thongTin = (GridView1.Rows[e.RowIndex].Cells[7].Controls[0] as TextBox).Text;
string trangThai = (GridView1.Rows[e.RowIndex].Cells[8].Controls[0] as TextBox).Text;
DateTime ngayDi = Convert.ToDateTime((GridView1.Rows[e.RowIndex].Cells[9].Controls[0] as TextBox).Text);
DateTime ngayVe = Convert.ToDateTime((GridView1.Rows[e.RowIndex].Cells[10].Controls[0] as TextBox).Text);
var s = tk.Update(dataKey);
s.IdTour = ID;
s.TenTour = name;
s.HanhTrinh = hanhTrinh;
s.SoNgay = soNgay;
s.GiaDiLai = giaDiLai;
s.GiaPhong = giaAno;
s.ThongTin = thongTin;
s.TrangThai = trangThai;
s.NgayDi = ngayDi;
s.NgayVe = ngayVe;
tk.SubmitChange();
GridView1.EditIndex = -1;
GridView1.DataSource = tk.GetAllTour();
GridView1.DataBind();
}