คำถามสุดท้ายของโปรเจคนี้แล้วรบกวนผู้รู้ทุกท่านครับ รับส่งข้อมูลเพื่อเรียกใช้งาน

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Net;
using System.Data.Sql;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using Microsoft.Reporting.WebForms;
using System.Text;
using System.IO;
using System.Web.Configuration;
using PdfSharp.Drawing;
using PdfSharp.Pdf;
using System.Globalization;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }


    protected void Button1_Click(object sender, EventArgs e)
    {
        string SQL = "SELECT tb_COURSE.fl_coursename, tb_STAFF.fl_empid, tb_STAFF.fl_name, tb_TRAIN.fl_result, tb_TRAIN.fl_startdate, tb_TRAIN.fl_enddate, tb_TRAIN.fl_day, tb_TRAIN.fl_hour  FROM tb_TRAIN LEFT JOIN tb_STAFF ON tb_TRAIN.fl_empid = tb_STAFF.fl_empid LEFT JOIN tb_COURSE ON tb_TRAIN.fl_courseid = tb_COURSE.fl_courseid WHERE tb_TRAIN.fl_empid = '" + TextBox1.Text + "'";
        
        SqlConnection Conn = new SqlConnection(ConfigurationManager.ConnectionStrings["dbConn"].ConnectionString);
        SqlCommand command = new SqlCommand();

        Conn.Open();
        SqlDataReader rs = null;
        SqlDataAdapter dtapter = new SqlDataAdapter(SQL, Conn);
        command.CommandText = SQL;
        command.Connection = Conn;
        rs = command.ExecuteReader();
        LocalReport rpt = new LocalReport();
        DataTable dt = new DataTable();
        rpt.ReportPath = "Report.rdlc";
        rpt.EnableExternalImages = true;
        rpt.EnableHyperlinks = true;
        rpt.DataSources.Clear();

        rpt.Refresh();
        dt.Columns.Add("coursename");
        dt.Columns.Add("empid");
        dt.Columns.Add("name");
        dt.Columns.Add("result");
        dt.Columns.Add("updater");
        dt.Columns.Add("update");
        dt.Columns.Add("day");
        DataRow dr = dt.NewRow();
        
        
        while (rs.Read())
        {

           dr = dt.NewRow();
            dr["coursename"] = rs["fl_coursename"].ToString();
            dr["empid"] = rs["fl_empid"].ToString();
            dr["name"] = rs["fl_name"].ToString();
            dr["result"] = rs["fl_result"].ToString();
            dr["updater"] = String.Format("{0}/{1}/{2}", rs["fl_startdate"].ToString().Substring(6, 2), rs["fl_startdate"].ToString().Substring(4, 2), Convert.ToInt32(rs["fl_startdate"].ToString().Substring(0, 4)) + 543);
            dr["update"] = String.Format("{0}/{1}/{2}", rs["fl_enddate"].ToString().Substring(6, 2), rs["fl_enddate"].ToString().Substring(4, 2), Convert.ToInt32(rs["fl_enddate"].ToString().Substring(0, 4)) + 543);
            dr["day"] = rs["fl_day"].ToString() + " วัน " + rs["fl_hour"].ToString() + " ชั่วโมง " ;
            dt.Rows.Add(dr);
    
        }

        rs.Close();
        rs = null;
        Conn.Close();


        rpt.DataSources.Add(new ReportDataSource("DataSet1", dt));
        rpt.Refresh();

        string reportType = "PDF";
        string mimeType = "";// "application/pdf";
        string encoding;
        string fileNameExtension;

        //Setup size Page//
        string deviceInfo = "<DeviceInfo>" +
            " <OutputFormat>PDF</OutputFormat>" +
            " <PageWidth>8.5in</PageWidth>" +
            " <PageHeight>12in</PageHeight>" +
            " <MarginTop>0.1in</MarginTop>" +
            " <MarginLeft>0.1in</MarginLeft>" +
            " <MarginRight>0.1in</MarginRight>" +
            " <MarginBottom>0.1in</MarginBottom>" +
            "</DeviceInfo>";

        Warning[] warnings;
        string[] streams;
        byte[] renderedBytes;

        //Render report//
        renderedBytes = rpt.Render(reportType, deviceInfo, out mimeType, out encoding, out fileNameExtension, out streams, out warnings);
        Response.Buffer = true;
        Response.Clear();
        Response.ContentType = mimeType;
        Response.AddHeader("content-disposition", "attachment; filename= " + TextBox1.Text + "." + fileNameExtension);
        Response.OutputStream.Write(renderedBytes, 0, renderedBytes.Length);
        Response.End();  
    }
}

        string SQL = "SELECT tb_COURSE.fl_coursename, tb_STAFF.fl_empid, tb_STAFF.fl_name, tb_TRAIN.fl_result, tb_TRAIN.fl_startdate, tb_TRAIN.fl_enddate, tb_TRAIN.fl_day, tb_TRAIN.fl_hour  FROM tb_TRAIN LEFT JOIN tb_STAFF ON tb_TRAIN.fl_empid = tb_STAFF.fl_empid LEFT JOIN tb_COURSE ON tb_TRAIN.fl_courseid = tb_COURSE.fl_courseid WHERE tb_TRAIN.fl_empid = '" + TextBox1.Text + "'";

 Response.AddHeader("content-disposition", "attachment; filename= " + TextBox1.Text + "." + fileNameExtension);