Saves any state that was modified after the TrackViewState method was invoked.
Assembly: System.Web (in System.Web.dll)
The method is used primarily by control developers.
View state is the cumulative values of the properties for a server control. These values are placed automatically in the ViewState property for the server control, which is an instance of the StateBag class. The ViewState property value is then persisted to a string object after the save state stage of the life cycle for the server control. For more information, see ASP.NET Page Life Cycle Overview.
When view state is saved, this string object is returned to the client as a variable that is stored in a hidden HTML input element. When you author custom server controls, you can improve efficiency by overriding the method and modifying the ViewState property for your server control. For more information, see ASP.NET State Management Overview.