如何从单击按钮的文件中下载PDF文件？

Question

I want to dowlnload a PDF file on a button click. I've try like that:

 protected void lbtnDownload_Click(object sender, EventArgs e)
    {
        if (lbtnDownload.Text != string.Empty)
        {
            else if (lbtnDownload.Text.EndsWith(".pdf"))
            {
                Response.ContentType = "application/pdf";
            }

            string filePath = lbtnDownload.Text;

            Response.ClearHeaders();
            Response.AddHeader("Content-Disposition", "attachment;filename=\"" + filePath + "\"");
            Response.TransmitFile(HttpContext.Current.Server.MapPath("~/") + "\\PDF\\" + filePath );
            Response.End();
        }

    }

But nothing happens, I mean when I debug it there is no exception, but the file is not downloading.

Does anyone knows where my mistake is, and what I should do to download the PDF?

Answer 1

Try this

    protected void btnUpload_Click(object sender, EventArgs e)
    {
        if(string.IsNullOrEmpty(txtName.Text)) return;            

        Response.ContentType = "application/octet-stream";
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + txtName.Text);
        string filePath = Server.MapPath(Path.Combine("~/SavedFolder/PDF", txtName.Text));
        Response.TransmitFile(filePath);
        Response.End();
    }