AssociationAttribute.ThisKey Property

Reference

Definition

Namespace:: System.Data.Linq.Mapping

Assembly:: System.Data.Linq.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Gets or sets members of this entity class to represent the key values on this side of the association.

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

Property Value

String

Default = Id of the containing class.

Examples

[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 )))
        {
            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

Remarks

For multiple members, use a comma-separated list.

The key is not required to match the primary key or foreign key, but the user-stated cardinality (0-1 for EntityRef<TEntity> or 0-n for EntitySet<TEntity>) is assumed to be true.

Applies to

Jaa