http://www.blogjava.net/kiant/articles/277929.html

http://blog.csdn.net/mngzilin/article/details/5516238

http://blog.sina.com.cn/s/blog_5da74eef0100bbfs.html

http://blog.csdn.net/xiehuan_uestc/article/details/7387923

http://www.cnblogs.com/Terrylee/archive/2006/03/27/360165.html

关于C# HTTP上传文件的参考资料