AssociationAttribute.ThisKey Eigenschaft

Definition

Namespace:

System.Data.Linq.Mapping

Assembly:

System.Data.Linq.dll

Ruft Member dieser Entitätsklasse ab, um die Schlüsselwerte auf dieser Seite der Zuordnung darzustellen, oder legt diese fest.

public:
 property System::String ^ ThisKey { System::String ^ get(); void set(System::String ^ value); };

public string ThisKey { get; set; }

member this.ThisKey : string with get, set

Public Property ThisKey As String

Eigenschaftswert

String

Standard = ID der enthaltenden Klasse.

Beispiele

[Association(Name="FK_CustomerCustomerDemo", Storage="_CustomerDemographic", ThisKey="CustomerTypeID", IsForeignKey=true)]
public CustomerDemographic CustomerDemographic
{
    get
    {
        return this._CustomerDemographic.Entity;
    }
    set
    {
        CustomerDemographic previousValue = this._CustomerDemographic.Entity;
        if (((previousValue != value)
                    || (this._CustomerDemographic.HasLoadedOrAssignedValue == false)))
        {
            this.SendPropertyChanging();
            if ((previousValue != null))
            {
                this._CustomerDemographic.Entity = null;
                previousValue.CustomerCustomerDemos.Remove(this);
            }
            this._CustomerDemographic.Entity = value;
            if ((value != null))
            {
                value.CustomerCustomerDemos.Add(this);
                this._CustomerTypeID = value.CustomerTypeID;
            }
            else
            {
                this._CustomerTypeID = default(string);
            }
            this.SendPropertyChanged("CustomerDemographic");
        }
    }
}

<Association(Name:="FK_CustomerCustomerDemo", Storage:="_CustomerDemographic", ThisKey:="CustomerTypeID", IsForeignKey:=True)> _
Public Property CustomerDemographic() As CustomerDemographic
    Get
        Return Me._CustomerDemographic.Entity
    End Get
    Set(ByVal value As CustomerDemographic)
        Dim previousValue As CustomerDemographic = Me._CustomerDemographic.Entity
        If (((previousValue Is value) _
           = False) _
           OrElse (Me._CustomerDemographic.HasLoadedOrAssignedValue = False)) Then
            Me.SendPropertyChanging()
            If ((previousValue Is Nothing) _
               = False) Then
                Me._CustomerDemographic.Entity = Nothing
                previousValue.CustomerCustomerDemos.Remove(Me)
            End If
            Me._CustomerDemographic.Entity = value
            If ((value Is Nothing) _
               = False) Then
                value.CustomerCustomerDemos.Add(Me)
                Me._CustomerTypeID = value.CustomerTypeID
            Else
                Me._CustomerTypeID = CType(Nothing, String)
            End If
            Me.SendPropertyChanged("CustomerDemographic")
        End If
    End Set
End Property

Hinweise

Verwenden Sie für mehrere Mitglieder eine durch Komma getrennte Liste.

Der Schlüssel muss nicht mit dem Primärschlüssel oder dem Fremdschlüssel übereinstimmen, aber die vom Benutzer angegebene Kardinalität (0-1 für EntityRef<TEntity> oder 0-n für EntitySet<TEntity>) wird angenommen, dass es wahr ist.