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