StateManagedCollection.SetDirtyObject(Object) Metode

Definisi

Ruang nama:

System.Web.UI

Rakitan:

System.Web.dll

Ketika ditimpa dalam kelas turunan, menginstruksikan yang object dimuat oleh koleksi untuk merekam seluruh statusnya untuk melihat status, daripada merekam hanya mengubah informasi.

protected:
 abstract void SetDirtyObject(System::Object ^ o);

protected abstract void SetDirtyObject(object o);

abstract member SetDirtyObject : obj -> unit

Protected MustOverride Sub SetDirtyObject (o As Object)

Parameter

o

Object

Yang IStateManager harus menserialisasikan dirinya sepenuhnya.

Contoh

Contoh kode berikut menunjukkan bagaimana kelas yang diketik StateManagedCollection dengan kuat mengimplementasikan metode abstrak SetDirtyObject . CycleCollection menggunakan StateBag objek untuk menyimpan informasi status tampilannya, dan hanya mendelegasikan panggilan ke SetDirty metode StateBag objek. Contoh kode ini adalah bagian dari contoh yang lebih besar yang disediakan untuk StateManagedCollection kelas .

//////////////////////////////////////////////////////////////
//
// The strongly typed CycleCollection class is a collection
// that contains Cycle class instances, which implement the
// IStateManager interface.
//
//////////////////////////////////////////////////////////////
[AspNetHostingPermission(SecurityAction.Demand, 
    Level=AspNetHostingPermissionLevel.Minimal)]
public sealed class CycleCollection : StateManagedCollection {
    
    private static readonly Type[] _typesOfCycles 
        = new Type[] { typeof(Bicycle), typeof(Tricycle) };

    protected override object CreateKnownType(int index) {
        switch(index) {
            case 0:
                return new Bicycle();
            case 1:
                return new Tricycle();                    
            default:
                throw new ArgumentOutOfRangeException("Unknown Type");
        }            
    }

    protected override Type[] GetKnownTypes() {
        return _typesOfCycles;
    }

    protected override void SetDirtyObject(object o) {
        ((Cycle)o).SetDirty();
    }
}

'////////////////////////////////////////////////////////////
'
' The strongly typed CycleCollection class is a collection
' that contains Cycle class instances, which implement the
' IStateManager interface.
'
'////////////////////////////////////////////////////////////
<AspNetHostingPermission(SecurityAction.Demand, _
    Level:=AspNetHostingPermissionLevel.Minimal)> _
               Public NotInheritable Class CycleCollection
    Inherits StateManagedCollection

    Private Shared _typesOfCycles() As Type = _
        {GetType(Bicycle), GetType(Tricycle)}

    Protected Overrides Function CreateKnownType(ByVal index As Integer) As Object
        Select Case index
            Case 0
                Return New Bicycle()
            Case 1
                Return New Tricycle()
            Case Else
                Throw New ArgumentOutOfRangeException("Unknown Type")
        End Select

    End Function


    Protected Overrides Function GetKnownTypes() As Type()
        Return _typesOfCycles

    End Function


    Protected Overrides Sub SetDirtyObject(ByVal o As Object)
        CType(o, Cycle).SetDirty()

    End Sub
End Class

Keterangan

Metode SetDirtyObject ini dipanggil secara internal oleh IStateManager.SaveViewStatemetode , IList.Add, dan IList.Insert .

Lihat juga

• IStateManager.SaveViewState()