清空浏览器缓存

//清除浏览器缓存
　　Response.Buffer = true;
Response.ExpiresAbsolute = DateTime.Now.AddDays(-1);
Response.Cache.SetExpires(DateTime.Now.AddDays(-1));
Response.Expires = 0;
Response.CacheControl = "no-cache";
Response.Cache.SetNoStore();

详细出处参考：http://www.jb51.net/article/30312.htm