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DataRelation.ParentKeyConstraint プロパティ

定義

UniqueConstraint の親列内の値が一意であることを保証する DataRelation を取得します。

public:
 virtual property System::Data::UniqueConstraint ^ ParentKeyConstraint { System::Data::UniqueConstraint ^ get(); };
public virtual System.Data.UniqueConstraint? ParentKeyConstraint { get; }
public virtual System.Data.UniqueConstraint ParentKeyConstraint { get; }
member this.ParentKeyConstraint : System.Data.UniqueConstraint
Public Overridable ReadOnly Property ParentKeyConstraint As UniqueConstraint

プロパティ値

親列内の値が一意になるようにする UniqueConstraint

次の例では、 オブジェクトの DataRelationParentKeyConstraint取得します。

Private Sub GetParentKeyConstraint()
    ' Get a DataRelation from a DataSet.
    Dim relation As DataRelation = _
        DataSet1.Relations("CustomerOrders")

    ' Get the relations parent key constraint.
    Dim constraint As UniqueConstraint = _
        relation.ParentKeyConstraint

    ' Get the constraint's DataColumns
    Dim constraintColumns() As DataColumn
    constraintColumns = constraint.Columns

    ' Print the column names.
    Dim i As Integer
    For i = 0 to constraintColumns.GetUpperBound(0)
       Console.WriteLine(constraintColumns(i).ColumnName.ToString())
    Next i
End Sub

適用対象

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