服务器启用了gizp，下载的excel模版会出现问题，怎么解决？
服务器相关参数：
IIS6.0
.net frmework3.5
启用IIS gzip压缩网站，压缩的参数里面没有包含xls后缀名

没有启用gizp时下载是正常了，启用了gizp就出现表头不见了，网上查找了下http://www.cnblogs.com/ppchen/archive/2009/02/19/1382530.html 里面是使用HttpModule
只有使用HttpModule这种方法吗？


下载文件代码

    /// <summary>
    /// 下载指定路径文件
    /// </summary>
    /// <param name="path">文件绝对路径</param>
    public static void DownLoadFile(string path, string oldFileName)
    {
        System.IO.FileInfo fi = new System.IO.FileInfo(path);
        if (fi.Exists)
        {
            //判断文件是否正在使用
            try
            {
                using (System.IO.FileStream fs = System.IO.File.Open(path, System.IO.FileMode.Append, System.IO.FileAccess.Write, System.IO.FileShare.None))
                {
                }
            }
            catch (Exception)
            {
                throw;
            }

            if (string.IsNullOrEmpty(oldFileName))
                oldFileName = path.Substring(path.LastIndexOf("\\") + 1);

            string browser = System.Web.HttpContext.Current.Request.UserAgent.ToUpper();
            if (browser.Contains("FIREFOX") == true)
                oldFileName = "\"" + oldFileName + "\"";
            else if (browser.Contains("MSIE")) 
 
                oldFileName = ToHexString(oldFileName);
            else
                oldFileName = HttpUtility.UrlEncode(oldFileName);

            System.Web.HttpContext.Current.Response.Clear();
            System.Web.HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + oldFileName);
            System.Web.HttpContext.Current.Response.AddHeader("Content-Length", fi.Length.ToString());
            System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream;charset=gb2321";
            System.Web.HttpContext.Current.Response.WriteFile(fi.FullName);
            System.Web.HttpContext.Current.Response.Flush();
            System.Web.HttpContext.Current.Response.Close();
        }
        else
        {
            throw new Exception("文件在服务器上不存在！");
        }
    }

[解决办法]

public static void ResponseApplicationFile(this HttpContext context, string filePath, string saveAsName, bool isDirectOpen = false)
{
    HttpResponse Response = context.Response;
    Response.Clear();
    Response.Buffer = true;
    Response.ContentType = MIMEUtility.GetMIMEType(filePath);
    string downloadFileSaveAsName = string.Empty;
    if (string.IsNullOrWhiteSpace(System.IO.Path.GetFileNameWithoutExtension(saveAsName))  
 
[解决办法]
 string.IsNullOrWhiteSpace(saveAsName))
    {
        downloadFileSaveAsName = System.IO.Path.GetFileName(filePath);
    }
    else if (System.IO.Path.GetExtension(filePath).ToUpper() == System.IO.Path.GetExtension(saveAsName))
    {
        downloadFileSaveAsName = saveAsName;
    }
    else
    {
        downloadFileSaveAsName = saveAsName + System.IO.Path.GetExtension(filePath);
    }
    Response.HeaderEncoding = Encoding.UTF8;
    if (System.IO.File.Exists(filePath))
    {
        Response.AddHeader("content-disposition", (isDirectOpen ? "" : "attachment;") + " filename=" + HttpUtility.UrlEncode(downloadFileSaveAsName, Encoding.UTF8) + ";size=" + (new FileInfo(filePath)).Length.ToString());
        byte[] contents = System.IO.File.ReadAllBytes(filePath);
        Response.BinaryWrite(contents);
    }
    else
    {
        Response.AddHeader("content-disposition", (isDirectOpen ? "" : "attachment;") + "filename=" + HttpUtility.UrlEncode(downloadFileSaveAsName, Encoding.UTF8) + ";size=0");
    }
    Response.Flush();
    Response.End();
}

然后这样调用：

protected void Page_Load(object sender, EventArgs e)
{
    this.Button_DownloadTemplateFile.Click += new EventHandler(Button_DownloadTemplateFile_Click);
}

void Button_DownloadTemplateFile_Click(object sender, EventArgs e)
{
    string filename = "xxxxxx.xls";
    string DownloadFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory+EnvironmentSetting.ThankyouLetterPath, filename);
    if (!System.IO.File.Exists(DownloadFilePath))
    {
        this.MessageBoxLayer.Show("找不到相案");
        return; 
 
    }
    byte[] contents = System.IO.File.ReadAllBytes(DownloadFilePath);
    FileInfo info = new FileInfo(DownloadFilePath);
    long fileSize = info.Length;
    this.Context.ResponseApplicationFile(DownloadFilePath, filename);
}

[解决办法]
同意楼上！

[解决办法]
晕！

那你写成 System.Web.HttpContext.Current.Response.ContentType = "application/octet-stream;charset=gb2321" 这个头是要干什么啊？