crystal report

CrystalReport1 r1 = new CrystalReport1();

private void button2_Click(object sender, EventArgs e)

        {

            OleDbConnection con = new OleDbConnection(ConnectionString);

            con.Open();

            str = "select * from product where price=(select max(price) from product)";

            com = new OleDbCommand(str, con);

            oledbda = new OleDbDataAdapter(com);

            ds = new DataSet();

            oledbda.Fill(ds, "product");

            dataGridView1.DataMember = "product";

            dataGridView1.DataSource = ds;

            con.Close();

            r1.SetDataSource(ds);

            CrystalReportViewer1.ReportSource = r1;

            CrystalReportViewer1.RefreshReport();

            CrystalReportViewer1.Refresh();