public bool DangNhap(string tenDangNhap, string matKhau)
{
var tK = data.ChiTiet(tenDangNhap, matKhau);
if (tK.Rows.Count > 0)
{
frmMain.hoVaTen = tK.Rows[0]["TENNV"].ToString();
frmMain.quyenHan = int.Parse(tK.Rows[0]["QUYEN"].ToString());
return(true);
}
else
{
return(false);
}
}