How to export div content in pdf on button click.

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How to export div content in pdf on button click.

i am facing problem while exporting div data in pdf

i have div in .aspx page like this..

<div id="FoodTokenDiv" runat="server">

<asp:Label ID="lblTab" runat="server">br mode="hold" />

.......
in .cs page i create table on this label and whatever i want to show on label after that i do the process of exporting div content in pdf like this...

Response.ContentType = "application/pdf";

Response.AddHeader("content-disposition", "attachment;filename=TokenForFoodTN" + did + ".pdf");

Response.Cache.SetCacheability(HttpCacheability.NoCache);

StringWriter stringWriter = new StringWriter();

HtmlTextWriter htmlTextWriter = new HtmlTextWriter(stringWriter);

FoodTokenDiv.RenderControl(htmlTextWriter);

StringReader stringReader = new StringReader(stringWriter.ToString());

Document Doc = new Document(new RectangleReadOnly(350, (i*10)+200), 5f, 5f, 5f, 5f);

HTMLWorker htmlparser = new HTMLWorker(Doc);

PdfWriter.GetInstance(Doc, Response.OutputStream);

Doc.Open();

htmlparser.Parse(stringReader);

Doc.Close();

Response.Write(Doc);

Response.End();

.......
here in Document Doc line i increase height of the according to data so i use i*10 here 10 is 10px which increase according to i.

please help me...
thanks...