在asp.net中导出Execl有两种方法，一种是将导出的文件存放在服务器某个文件夹下面，然后将文件地址输出在浏览器上；一种是将文件直接将文件输出流写给浏览器。在Response输出时，t分隔的数据，导出execl时，等价于分列，n等价于换行。-Asp.net export Execl in two ways, one is stored in the exported file server to a folder, and then output the file in the browser address　a file is written directly to the file output stream browser. In the Response output, t-delimited data, export execl, is equivalent to sub-out, n is equivalent to the line.