Pdf and Doc download from server Asp.net

Pdf and Doc download from server

upload pdf and doc files to project folder and write below code

Step1: index.cs html

<p>1. <asp:ImageButton ID="ImageButton1" runat="server" CssClass="Downimg" ImageUrl="../images/pdf.png" onclick="ImageButton1_Click" /><span>DataSheet </span></p>

step2: controller.cs
        protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
        {
            Response.ContentType = "application/pdf";
            Response.AppendHeader("Content-Disposition", "attachment; filename=DataSheet.pdf");
            Response.TransmitFile(Server.MapPath("~/PDF/DataSheet.pdf"));
            Response.End();
        }