private void btnPreview_Click(object sender, EventArgs e)
{
BaoCao.rptBangDiemTheoLop obj;
obj = new BaoCao.rptBangDiemTheoLop();
string strLenh;
strLenh = "EXEC SP_RP_BANGDIEMLOP '" + cmbTenLop.SelectedValue.ToString() + "', '" +
cmbTenMH.SelectedValue.ToString() + "','" + cmbLan.Text + "'";
DataTable MyTable;
MyTable = Program.ExecSqlDataTable(strLenh);
obj.SetDataSource(MyTable);
obj.SetParameterValue("TENLOP", cmbTenLop.Text);
obj.SetParameterValue("TENMH", cmbTenMH.Text);
obj.SetParameterValue("LAN", cmbLan.Text);
crptView.ReportSource = obj;
}