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DataRow.GetParentRows Method (DataRelation)

Gets the parent rows of a DataRow using the specified DataRelation.

Namespace: System.Data
Assembly: System.Data (in

public DataRow[] GetParentRows (
	DataRelation relation
public DataRow[] GetParentRows (
	DataRelation relation
public function GetParentRows (
	relation : DataRelation
) : DataRow[]



The DataRelation to use.

Return Value

An array of DataRow objects or an array of length zero.

Exception typeCondition


The DataRelation does not belong to this row's DataSet.


The row is a null reference (Nothing in Visual Basic).


The relation's child table is not the table the row belongs to.


The row does not belong to a DataTable.

In a DataSet, the collection of all parent DataRelation objects for the data set is returned by the GetParentRows method.

The DataTable also contains a collection of DataRelation objects, returned by the ParentRelations property.

The following example uses the GetParentRows to return the child DataRow objects for every child DataRelation in a DataTable. The value of each column in the row is then printed.

Private Sub GetChildRowsFromDataRelation(table As DataTable)
    Dim relation As DataRelation
    Dim arrRows() As DataRow
    Dim row As DataRow
    Dim i As Integer
    Dim column As DataColumn 
    For Each relation In table.ParentRelations
      For Each row In table.Rows
          arrRows = row.GetParentRows(relation)
          ' Print values of rows.
          For i = 0 To arrRows.GetUpperBound(0)
             For Each column in table.Columns
             Next column
          Next i
       Next row
    Next relation
 End Sub

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0