Export Grid to Pdf Using Mvc4

Question

    public ActionResult ExportPdf()

        {

            GridView gv = new GridView();

            gv.DataSource = fetch();

            gv.DataBind();

            Response.ClearContent();

            Response.Buffer = true;

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

            Response.ContentType = "application/pdf";

            Response.Charset = "";

            StringWriter sw = new StringWriter();

            HtmlTextWriter htw = new HtmlTextWriter(sw);

            gv.RenderControl(htw);

           

            Response.Output.Write(sw.ToString());

            Response.Flush();

            Response.End();

            return RedirectToAction("Index");

        }