您唯一的方法是提供指向文件，然后一次发送一个，或者全部压缩在一起.每个回发都可以用来向下发送一个文件.这些是HTML运作方式的基本事实.

The only way you can do this, is to offer links to the files and to send them one at a time, or all zipped together. Each postback can be used to send one file down. These are basic facts of how HTML works.