FileInfo DownloadFile = new FileInfo(FullFileName);
            try
            {
                Response.Clear();
                Response.ClearHeaders();
                Response.Buffer = false;
                Response.ContentType = "audio/wav";
                Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.Default));
                Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
                Response.WriteFile(DownloadFile.FullName);
                Response.Flush();
                Response.End();            }
            catch
            {
                string msgText = "网络原因,未能下载!";
                this.Page.ClientScript.RegisterStartupScript(this.GetType(), "ok", "<script>alert('" + msgText + "');</script>");
            }