When the page is posted back to the server, the ASP.NET page framework re-hashes the view state data and compares the hash with the hash stored previously in the page.

• 页回发到服务器时；ASP.；NET页框架会对视图状态数据重新进行哈希处理；并将得到的哈希与页中以前存储的哈希进行比较。