How to download file with asp.net on buttton's onClick event?

Question

I have a String variable (in C#) that contain the full path of PDF file on my server (like that \"~/doc/help.pdf\").

I want that in click on button, this file will down

Answer 1

I think you are looking for something like this.

private void Button1_click(object sender, System.EventArgs e)
{
    Response.ContentType = "Application/pdf";
    Response.AppendHeader("Content-Disposition", "attachment; filename=help.pdf");
    Response.TransmitFile(Server.MapPath("~/doc/help.pdf"));
    Response.End();
}