AssociationAttribute.IsForeignKey Properti
Definisi
Penting
Beberapa informasi terkait produk prarilis yang dapat diubah secara signifikan sebelum dirilis. Microsoft tidak memberikan jaminan, tersirat maupun tersurat, sehubungan dengan informasi yang diberikan di sini.
Mendapatkan atau menetapkan anggota sebagai kunci asing dalam asosiasi yang mewakili hubungan database.
public:
property bool IsForeignKey { bool get(); void set(bool value); };
public bool IsForeignKey { get; set; }
member this.IsForeignKey : bool with get, set
Public Property IsForeignKey As Boolean
Nilai Properti
Default = false
.
Contoh
[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
Berlaku untuk
Berkolaborasi dengan kami di GitHub
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