Main Page

  Previous Section Next Section


System.Web.UI (system.web.dll)interface

This interface provides methods that are used to manage view state, which is the set of information that describes a control's current state. View state is stored in a hidden field on a Web Forms page, so it can be maintained across postbacks. State management is built into the Control class, and you can write values into the Control.ViewState collection to store any information you need without using IStateManager. However, you can also create a custom control that implements this interface to customize how state management works. The IStateManager consists of three methods: SaveViewState( ), which stores changes to an object, LoadViewState( ), which retrieves and applies previously stored values, and TrackViewState( ), which sets the IsTrackingViewState property to True and instructs ASP.NET to track changes to the control's view state.

public interface IStateManager {
// Public Instance Properties
   public bool IsTrackingViewState{get; }
// Public Instance Methods
   public void LoadViewState(object state);
   public object SaveViewState( );
   public void TrackViewState( );

Implemented By

Multiple types

      Previous Section Next Section