How to display data from database as pdf in browser

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ASP.NET

C#3.5

actually my code is working for opening pdf format in file but i want retrieved data from databse in pdf format in browser
below is the code any one helpme or give me examples
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.IO;
using iTextSharp.text;
using iTextSharp.text.pdf;
using iTextSharp.text.html;
using iTextSharp.text.html.simpleparser;
using System.Text;
using System.Data;
using System.Data.SqlClient;

public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
string cs = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
SqlConnection con = new SqlConnection(cs);
SqlCommand cmd = new SqlCommand("select * from employeep",con);
DataTable dt = GetData(cmd);
GridView1.DataSource = dt;
GridView1.DataBind();

}
private DataTable GetData(SqlCommand cmd)
{
DataTable dt = new DataTable();
String strConnString = "Data Source=HOME;Initial Catalog=Registration;Integrated Security=True";
SqlConnection con = new SqlConnection(strConnString);
SqlDataAdapter sda = new SqlDataAdapter();
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
try
{
con.Open();
sda.SelectCommand = cmd;
sda.Fill(dt);
return dt;
}
catch (Exception ex)
{
throw ex;
}
finally
{
con.Close();
sda.Dispose();
con.Dispose();
}
}


public override void VerifyRenderingInServerForm(Control control)
{
/* Verifies that the control is rendered */
}
protected void OnPaging(object sender, GridViewPageEventArgs e)
{
GridView1.PageIndex = e.NewPageIndex;
GridView1.DataBind();
}

void btnExportPDF_Click(object sender, EventArgs e)
{
Response.ContentType = "application/pdf";
Response.AddHeader("content-disposition", "attachment;filename=GridViewExport.pdf");
Response.Cache.SetCacheability(HttpCacheability.NoCache);
StringWriter sw = new StringWriter();
HtmlTextWriter hw = new HtmlTextWriter(sw);
GridView1.AllowPaging = false;
GridView1.DataBind();
GridView1.RenderControl(hw);
StringReader sr = new StringReader(sw.ToString());
Document pdfDoc = new Document(PageSize.A4, 10f,10f,10f,0f);
HTMLWorker htmlparser = new HTMLWorker(pdfDoc);
PdfWriter.GetInstance(pdfDoc, Response.OutputStream);
pdfDoc.Open();
htmlparser.Parse(sr);
pdfDoc.Close();
Response.Write(pdfDoc);
Response.Cache.SetCacheability(HttpCacheability.NoCache);
Response.End();
}