public void LoginWithUser()
{
NguoiDungDAL loginWithUser = new NguoiDungDAL();
loginWithUser._nguoiDung = this._nguoiDung;
KetQua = loginWithUser.LoginWithUser();
GridView grid = new GridView();
grid.DataSource = KetQua;
grid.DataBind();
if (grid.Rows.Count != 0)
{
IsInvalid = true;
_nguoiDung.HoTen = grid.Rows[0].Cells[0].Text;
_nguoiDung.IdNguoiDung = int.Parse(grid.Rows[0].Cells[1].Text);
}
else
{
IsInvalid = false;
}
}