UniqueConstraint.Equals(Object) 方法

定義

命名空間:

System.Data

組件:

System.Data.Common.dll

來源:

UniqueConstraint.cs

將這個條件約束和第二個條件約束相比較，以判斷兩者是否相同。

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

public override bool Equals (object? key2);

override this.Equals : obj -> bool

Public Overrides Function Equals (key2 As Object) As Boolean

參數

key2

Object

這個 UniqueConstraint 所要比較的物件。

傳回

Boolean

若兩個條件約束相等，則為 true；否則為 false。

範例

下列範例會比較兩個 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

如果兩個條件約束限制相同的數據行，則兩個條件約束相等。

另請參閱

• ParentKeyConstraint
• 將條件約束新增至數據表