DataTable.ParentRelations DataTable.ParentRelations DataTable.ParentRelations DataTable.ParentRelations Property

Definición

Obtiene la colección de relaciones primarias para este DataTable.Gets the collection of parent relations for this DataTable.

public:
 property System::Data::DataRelationCollection ^ ParentRelations { System::Data::DataRelationCollection ^ get(); };
[System.ComponentModel.Browsable(false)]
[System.Data.DataSysDescription("DataTableParentRelationsDescr")]
public System.Data.DataRelationCollection ParentRelations { get; }
member this.ParentRelations : System.Data.DataRelationCollection
Public ReadOnly Property ParentRelations As DataRelationCollection

Valor de propiedad

Colección DataRelationCollection que contiene las relaciones primarias para la tabla.A DataRelationCollection that contains the parent relations for the table. Si no existe ningún objeto DataRelation, se devuelve una colección vacía.An empty collection is returned if no DataRelation objects exist.

Ejemplos

En el ejemplo siguiente se ParentRelations usa la propiedad para devolver DataRelation cada elemento DataTableprimario en.The following example uses the ParentRelations property to return each parent DataRelation in a DataTable. Después, cada relación se utiliza como argumento en el GetParentRows método DataRow de para devolver una matriz de filas.Each relation is then used as an argument in the GetParentRows method of the DataRow to return an array of rows. A continuación, se imprime el valor de cada columna de la fila.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

Se aplica a

Consulte también: