Response.WriteFile的应用~

1.可以读取文件，将文件在页面显示。

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<table>
<tr>
    <td style="width: 100px"><% Response.WriteFile("HTMLPage.htm"); %></td>
</tr>
</table>

2.读取文件做下载功能：

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private void downloadfile(string fname)
{
    if (fname == null || fname.trim() == "")
        return;
    fileinfo file = new fileinfo(fname);

    response.clear();
    response.addheader("content-disposition", 
        "attachment;   filename=" + httputility.urlencode((file.name), system.text.encoding.utf8));
    response.addheader("content-length", file.length.tostring());
    response.contenttype = "application/octet-stream";

    response.writefile(file.fullname);
    response.flush();

    response.close();
    response.end();
}