System.Web.UI (system.web.dll) | sealed class |
Every control stores view state information in a
StateBag provided in the
Control.ViewState property, if you enabled the
Control.EnableViewState property. View state
includes information representing all properties of a control or page
and any custom items you added. Information is provided in a
key/value collection and is accessed much like the
System.Web.SessionState.HttpSessionState or
System.Web.Caching.Cache class. You can add a
value to the StateBag collection like this:
ViewState["NewObject"] = ds;.
The StateBag can contain primitive types or
full-fledged serializable objects. When retrieving an object, you
will have to cast it to the correct type. Also note that you can
enumerate through the StateBag collection by using
the StateItem enumerator.
public sealed class StateBag : IStateManager, IDictionary, ICollection, IEnumerable {
// Public Constructors
public StateBag( );
public StateBag(bool ignoreCase);
// Public Instance Properties
public int Count{get; } // implements ICollection
public ICollection Keys{get; } // implements System.Collections.IDictionary
public object this[string key]{set; get; }
public ICollection Values{get; } // implements System.Collections.IDictionary
// Public Instance Methods
public StateItem Add(string key, object value);
public void Clear( ); // implements System.Collections.IDictionary
public IDictionaryEnumerator GetEnumerator( ); // implements System.Collections.IDictionary
public bool IsItemDirty(string key);
public void Remove(string key);
public void SetItemDirty(string key, bool dirty);
}
Returned By
Control.ViewState,
System.Web.UI.MobileControls.MobileControl.CustomAttributes,
System.Web.UI.WebControls.DataGridColumn.ViewState
Passed To
AttributeCollection.AttributeCollection( ),
System.Web.UI.WebControls.Style.Style( ),
System.Web.UI.WebControls.TableItemStyle.TableItemStyle(
),
System.Web.UI.WebControls.TableStyle.TableStyle( )