how to export gridview data to PDF using asp.net c#

In code behind add these references:-

using iTextSharp.text;

using iTextSharp.text.pdf;

using iTextSharp.text.html.simpleparser;

After that write the following code in code behind:-

public override void VerifyRenderingInServerForm(Control control)

{

// Verifies that the control is rendered

}

protected void btnPDF_Click(object sender, ImageClickEventArgs e)

{

Response.ContentType = "application/pdf";

Response.AddHeader("content-disposition", "attachment;filename=Example.pdf");

Response.Cache.SetCacheability(HttpCacheability.NoCache);

StringWriter sw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(sw);

gvdetails.AllowPaging = false;

gvdetails.DataBind();

gvdetails.RenderControl(hw);

gvdetails.HeaderRow.Style.Add("width", "25%");

gvdetails.HeaderRow.Style.Add("font-size", "11px");

gvdetails.Style.Add("text-decoration", "none");

gvdetails.Style.Add("font-family", "Arial, Helvetica, sans-serif;");

gvdetails.Style.Add("font-size", "9px");

StringReader sr = new StringReader(sw.ToString());

Document pdfDoc = new Document(PageSize.A2, 7f, 7f, 7f, 0f);

HTMLWorker htmlparser = new HTMLWorker(pdfDoc);

PdfWriter.GetInstance(pdfDoc, Response.OutputStream);

pdfDoc.Open();

htmlparser.Parse(sr);

pdfDoc.Close();

Response.Write(pdfDoc);

Response.End();

}