IState Manager. Save View State Method
Saves the changes to the Parameter object's view state since the time the page was posted back to the server.
virtual System::Object ^ System.Web.UI.IStateManager.SaveViewState() = System::Web::UI::IStateManager::SaveViewState;
object IStateManager.SaveViewState ();
Function SaveViewState () As Object Implements IStateManager.SaveViewState
This method is used primarily by control developers.
View state is the accumulation of the values of a server control's properties. These values are automatically placed in the server control's ViewState property, which is an instance of the StateBag class. This property's value is then persisted to a string object after the save state stage of the server control life cycle.
When view state is saved, this string object is returned to the client as a variable that is stored in an HTML
hidden element. When you author custom server controls, you can improve efficiency by overriding this method and modifying your server control's ViewState property.