AssociationAttribute.DeleteRule Properti

Definisi

Ruang nama:

System.Data.Linq.Mapping

Rakitan:

System.Data.Linq.dll

Mendapatkan atau mengatur perilaku penghapusan untuk asosiasi.

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

public string DeleteRule { get; set; }

member this.DeleteRule : string with get, set

Public Property DeleteRule As String

Nilai Properti

String

String yang mewakili aturan.

Contoh

[Association(Name="FK_Products_Categories", Storage="_Products", OtherKey="CategoryID", DeleteRule="NO ACTION")]
public EntitySet<Product> Products
{
    get
    {
        return this._Products;
    }
    set
    {
        this._Products.Assign(value);
    }
}

<Association(Name:="FK_Products_Categories", Storage:="_Products", OtherKey:="CategoryID", DeleteRule:="NO ACTION")>  _
Public Property Products() As EntitySet(Of Product)
    Get
        Return Me._Products
    End Get
    Set
        Me._Products.Assign(value)
    End Set
End Property

Keterangan

Jika diatur ke null, tidak ada perilaku penghapusan yang ditambahkan. Misalnya, "CASCADE" akan menambahkan "ON DELETE CASCADE" ke hubungan kunci asing.

Dalam contoh berikut, aturannya adalah tidak mengambil tindakan apa pun.