如果服务器需要两个图像，你必须为其他数据编码相同的东西
这取决于web service.you可以从以下链接中获取想法：
$
http://urenjoy.blogspot.com/2009/12/pass-parameter-web-service-image-upload.html

You have to code same thing for other data if server needs two images together It depends on web service.you can take idea from following link:
http://urenjoy.blogspot.com/2009/12/pass-parameter-web-service-image-upload.html