สอบถามการทำ Crystal Report โดย C# หน่อยครับ โดยดึงข้อมูลจาก Database โดย ID ของแถวข้อมูลนั้น

private void btReport_Click(object sender, EventArgs e)
        {
            SqlConnection objConn = new SqlConnection();
            SqlCommand objCmd = new SqlCommand();
            SqlDataAdapter dtAdapter = new SqlDataAdapter();

            DataSet ds = new DataSet();
            DataTable dt = null;
            string strConnString = null;
            StringBuilder strSQL = new StringBuilder();

            strConnString = "Server=Apinun-PC;UID=sa;PASSWORD=1234;database=Project04;Max Pool Size=400;Connect Timeout=600;";

            strSQL.Append(" WHERE CardID = '" + this.txtReport.Text + "' ");

            objConn.ConnectionString = strConnString;
            var _with1 = objCmd;
            _with1.Connection = objConn;
            _with1.CommandText = strSQL.ToString();
            _with1.CommandType = CommandType.Text;
            dtAdapter.SelectCommand = objCmd;

            dtAdapter.Fill(ds, "Project04");
            dt = ds.Tables[0];

            dtAdapter = null;
            objConn.Close();
            objConn = null;

            ReportDocument rpt = new ReportDocument();

            rpt.Load(Server.MapPath("CrystalReport1.rpt"));
            rpt.SetDataSource(dt);
            this.CrystalReportViewer1.ReportSource = rpt;
        }