private void cboMaGT_SelectedIndexChanged_1(object sender, EventArgs e)
{
DataTable dt = tv.LoadTextBox(cboMaGT.Text);
foreach (DataRow dr in dt.Rows)
{
txtTenGT.Text = dr["TenGT"].ToString();
txtHocPhi.Text = dr["Gia"].ToString();
lblSoBuoi.Text = dr["ThoiHan"].ToString();
}
}
