UniqueConstraint.Equals(Object) 方法

public:
 override bool Equals(System::Object ^ key2);

public override bool Equals(object? key2);

public override bool Equals(object key2);

override this.Equals : obj -> bool

Public Overrides Function Equals (key2 As Object) As Boolean

參數

傳回

true若約束條件相等，則為 ;否則，。 false

範例

以下範例比較兩個 UniqueConstraint 物件。

Private Sub CompareConstraints()
    Dim constraintCustomerOrders As UniqueConstraint
    Dim constraintOrderDetails As UniqueConstraint
    Dim relationCustomerOrders As DataRelation
    Dim relationOrderDetails As DataRelation

    ' Get a DataRelation from a DataSet.
    relationCustomerOrders = DataSet1.Relations("CustomerOrders")

    '  Get a constraint.
    constraintCustomerOrders = relationCustomerOrders.ParentKeyConstraint

    ' Get a second relation and constraint.
    relationOrderDetails = DataSet1.Relations("OrderDetails")
    constraintOrderDetails = relationOrderDetails.ParentKeyConstraint

    ' Compare the two.
    Console.WriteLine( _
        constraintCustomerOrders.Equals(constraintOrderDetails).ToString())
 End Sub

備註

若兩個約束條件限制相同的欄位，則兩者相等。

另請參閱

• ParentKeyConstraint
• 將條件約束新增至數據表