次の方法で共有


ForeignKeyConstraint.Equals(Object) メソッド

定義

現在の ForeignKeyConstraint が指定したオブジェクトと同一かどうかを示す値を取得します。

public:
 override bool Equals(System::Object ^ key);
public override bool Equals (object? key);
public override bool Equals (object key);
override this.Equals : obj -> bool
Public Overrides Function Equals (key As Object) As Boolean

パラメーター

key
Object

この ForeignKeyConstraint と比較するオブジェクト。 2 つの ForeignKeyConstraint が同じ列を制約している場合、両者は同等です。

戻り値

オブジェクトが同一の場合は true。それ以外の場合は false

次の例では、 メソッドを に追加する前に、新しい ForeignKeyConstraint を作成し、 メソッドを使用して他の Equals コレクション メンバーと照合します ConstraintCollection

private void CreateConstraint(DataSet dataSet)
{
   // Create the ForignKeyConstraint with two DataColumn objects.
   DataColumn parentCol = dataSet.Tables["Customers"].Columns["id"];
   DataColumn childCol = dataSet.Tables["Orders"].Columns["OrderID"];
   ForeignKeyConstraint fkeyConstraint =
      new ForeignKeyConstraint("fkConstraint", parentCol, childCol);

   // Test against existing members using the Equals method.
   foreach(ForeignKeyConstraint testConstraint in
       dataSet.Tables["Orders"].Constraints)
   {
      if(fkeyConstraint.Equals(testConstraint)){
         Console.WriteLine("Identical ForeignKeyConstraint!");
          // Insert code to delete the duplicate object,
          // or stop the procedure.
      }
   }
}
Private Sub CreateConstraint(dataSet As DataSet)
    ' Create the ForignKeyConstraint with two DataColumn objects.
    Dim parentCol As DataColumn = _
       dataSet.Tables("Customers").Columns("id")
    Dim childCol As DataColumn = _
       dataSet.Tables("Orders").Columns("OrderID")
    Dim fkeyConstraint As _
       New ForeignKeyConstraint("fkConstraint", parentCol, childCol)

    ' Test against existing members using the Equals method.
    Dim testConstraint As ForeignKeyConstraint
    For Each testConstraint In  dataSet.Tables("Orders").Constraints
        If fkeyConstraint.Equals(testConstraint) Then
            Console.WriteLine("Identical ForeignKeyConstraint!")
            ' Insert code to delete the duplicate object, 
            ' or stop the procedure.
        End If
    Next testConstraint
End Sub

適用対象