HttpContext.Current.Response.BinaryWrite 下载文件摘要丢失

悬赏园豆：50 [已关闭问题] 关闭于 2010-04-07 00:07

代码

   public static void ToDownload(string serverfilpath, string filename)
    {
        FileStream fileStream = new FileStream(serverfilpath, FileMode.Open);
        long fileSize = fileStream.Length;
        HttpContext.Current.Response.ContentType = "application/octet-stream";
        HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment; filename=" +UTF_FileName(filename));
        ////attachment --- 作为附件下载
        ////inline --- 在线打开
        HttpContext.Current.Response.AddHeader("Content-Length", fileSize.ToString());
        byte[] fileBuffer = new byte[fileSize];
        fileStream.Read(fileBuffer, 0, (int)fileSize);
        HttpContext.Current.Response.BinaryWrite(fileBuffer);
        fileStream.Close();
        HttpContext.Current.Response.End();
    }
    private static string UTF_FileName(string filename)
    {
        return (HttpUtility.UrlEncode(filename, System.Text.Encoding.UTF8)).Replace("+", "%20");
    }