Create data driven PDF on the fly by using SQL server reporting service (SSRS)

using System;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;


using System.Net;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

using System.Web.Services.Protocols;
using Rse2005 = ReportExecution2005;


public partial class RsPdf : System.Web.UI.Page
{
    private string RptMemo="";

    protected void Page_Load(object sender, EventArgs e)
    {

    }
    //
    protected void BtnSubmit_Click(object sender, EventArgs e)
    {
        //we only care about first 50 characters
        string tmpStr = txtRptMemo.Text.Trim();
        
        if(""==tmpStr)
        {
            tmpStr = "Your input from web browser";
        }
        else if (tmpStr.Length > 50)
        {
            tmpStr = tmpStr.Substring(0, 50);

        }
        else
        {
            //do nothing
        }
        
        RptMemo = tmpStr;
        RenderPdf();

    }

    //Call Reporting service to render PDF
    private void RenderPdf()
    {

        // Prepare Render arguments
        string historyID = null;
        string deviceInfo = null;
        string format = "PDF";
        Byte[] results;
        string encoding = String.Empty;
        string mimeType = String.Empty;
        string extension = String.Empty;
        Rse2005.Warning[] warnings = null;
        string[] streamIDs = null;


        Rse2005.ReportExecutionService rsExec = new Rse2005.ReportExecutionService();
        rsExec.Credentials = System.Net.CredentialCache.DefaultCredentials;

        //rsExec.Credentials = new NetworkCredential(username, password, domain);

        Rse2005.ExecutionInfo ei = rsExec.LoadReport("/PdfReport/pdf01", historyID);
        Rse2005.ParameterValue[] rptParameters = new Rse2005.ParameterValue[1];

        rptParameters[0] = new Rse2005.ParameterValue();
        rptParameters[0].Name = "ReportMemo";
        rptParameters[0].Value = RptMemo;

        //render the PDF
        rsExec.SetExecutionParameters(rptParameters, "en-us");
        results = rsExec.Render(format, deviceInfo, out extension, out encoding, out mimeType, out warnings, out streamIDs);

 
        Response.AddHeader("content-disposition", "attachment; filename=pdf01.pdf");
        Response.OutputStream.Write(results, 0, results.Length);

        //This is very important if you want to directly download from stream instead of file
        Response.End();

    }

}