asp.net 下载大文件

http://support.microsoft.com/kb/823409/EN-US/
关键在这里,用下面的代码解决问题

<script runat=server language=C#>
    void Page_Load() {
        Response.ContentType="application/x-zip-compressed";
        Response.AddHeader("Content-Disposition", "attachment;filename=z.zip");
        Response.TransmitFile("c:\\repro\\z.zip");
    }
</script>