ASP.NET.in.a.Nutshell.Second.Edition [Electronic resources] نسخه متنی

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( )