我做了个下载的程序，就是将上传的文件路径传到数据库中，然后通过数据库中的路径将文件下载到客户端，但是当下载时会先下载当前页面的程序，而不是数据库中文件的路径。有没有解决办法！！我是菜鸟！！这是我下载的代码,请大虾指点：

  int id = int.Parse(Request.QueryString["id"]);
            DataTable dtd = message.getallbyid(id);
            p = dtd.Rows[0]["filepath"].ToString();
            String FullFileName = System.Web.HttpContext.Current.Server.MapPath(p);
            FileInfo DownloadFile = new FileInfo(FullFileName);
            System.Web.HttpContext.Current.Response.Clear();
            System.Web.HttpContext.Current.Response.ClearHeaders();
            System.Web.HttpContext.Current.Response.Buffer = false;
            System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream";
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(DownloadFile.FullName, System.Text.Encoding.UTF8));
            System.Web.HttpContext.Current.Response.AppendHeader("Content-Length", DownloadFile.Length.ToString());
            System.Web.HttpContext.Current.Response.WriteFile(DownloadFile.FullName);
            System.Web.HttpContext.Current.Response.Flush();
            System.Web.HttpContext.Current.Response.End();