Built-in objects application, ViewState

Application:

　　Global public variable Group

Storage location: Server

Features: All access users are access to the same variable, but as long as the server does not stop, the variable exists in the server's memory, do not use the loop to create a large number of application objects, may be created

into a server crash.

Life cycle: Permanent, as long as the server does not stop

How to use: Same as session

ViewState:

Used to record some state of a page, like a human case, such as when a commit is executed, the Web page can retain some text boxes that have been entered instead of emptying

In WebForm, Microsoft has already done this for us, bringing this functionality to our own.

Built-in objects application, ViewState