private void btntim_Click(object sender, EventArgs e)
{
if (radioButton1.Checked)
{
TaiLieu tl = new TaiLieu();
dataGridView1.DataSource = tl.timtheoma(matailieu, txttimkiem.Text);
}
else if (radioButton2.Checked)
{
TaiLieu tl = new TaiLieu();
dataGridView1.DataSource = tl.timtheoten(matailieu, txttimkiem.Text);
}
else
{
MessageBox.Show("Chưa có dữ liệu!");
}
}