服务器端直接向客户端输出文件内容保存

protected void ResponseFile(string fileContent, string filename)
    {
        string coding = "gb2312";
        Response.Clear();
        Response.Charset = coding;
        Response.Buffer = true;
        this.EnableViewState = false;
        Response.ContentEncoding = System.Text.Encoding.GetEncoding(coding);//.Default;
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + filename);
       Response.Write(fileContent);
        Response.Flush();
        Response.Close();

        Response.End();
    }