DataTable.ParentRelations Özellik

public:
 property System::Data::DataRelationCollection ^ ParentRelations { System::Data::DataRelationCollection ^ get(); };

public System.Data.DataRelationCollection ParentRelations { get; }

[System.ComponentModel.Browsable(false)]
public System.Data.DataRelationCollection ParentRelations { get; }

[System.ComponentModel.Browsable(false)]
[System.Data.DataSysDescription("DataTableParentRelationsDescr")]
public System.Data.DataRelationCollection ParentRelations { get; }

member this.ParentRelations : System.Data.DataRelationCollection

[<System.ComponentModel.Browsable(false)>]
member this.ParentRelations : System.Data.DataRelationCollection

[<System.ComponentModel.Browsable(false)>]
[<System.Data.DataSysDescription("DataTableParentRelationsDescr")>]
member this.ParentRelations : System.Data.DataRelationCollection

Public ReadOnly Property ParentRelations As DataRelationCollection

Özellik Değeri

DataRelationCollection

DataRelationCollectionTablo için üst ilişkileri içeren bir.A DataRelationCollection that contains the parent relations for the table. Bir nesne yoksa boş bir koleksiyon döndürülür DataRelation .An empty collection is returned if no DataRelation objects exist.

Öznitelikler

BrowsableAttribute DataSysDescriptionAttribute

Örnekler

Aşağıdaki örnek, ParentRelations içindeki her üst öğeyi döndürmek için özelliğini kullanır DataRelation DataTable .The following example uses the ParentRelations property to return each parent DataRelation in a DataTable. Her ilişki daha sonra GetParentRows DataRow öğesine bir satır dizisi döndürmek için yönteminde bir bağımsız değişken olarak kullanılır.Each relation is then used as an argument in the GetParentRows method of the DataRow to return an array of rows. Daha sonra satırdaki her sütunun değeri yazdırılır.The value of each column in the row is then printed.

private void GetChildRowsFromDataRelation(DataTable table)
{
    DataRow[] rowArray;
    foreach(DataRelation relation in table.ParentRelations)
    {
        foreach(DataRow row in table.Rows)
        {
            rowArray = row.GetParentRows(relation);
            // Print values of rows.
            for(int i = 0; i < rowArray.Length; i++)
            {
                foreach(DataColumn column in table.Columns)
                {
                    Console.WriteLine(rowArray[i][column]);
                }
            }
        }
    }
}

Private Sub GetChildRowsFromDataRelation(table As DataTable)
    Dim rowArray() As DataRow
    Dim relation As DataRelation, row As DataRow
    Dim column As DataColumn, i As Integer     
    For Each relation In  table.ParentRelations
        For Each row In  table.Rows
            rowArray = row.GetParentRows(relation)
            ' Print values of rows.             
            For i = 0 To rowArray.Length - 1                 
                For Each column In  table.Columns
                    Console.WriteLine(rowArray(i)(column))
                Next column
            Next i
        Next row
    Next relation
End Sub

Şunlara uygulanır

Ayrıca bkz.

• ChildRelations
• DataRelation
• DataSet
• Relations
• DataTablesDataTables