Export (0) Print
Expand All

DataRow.GetParentRows Method (DataRelation)

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

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

public DataRow[] GetParentRows(
	DataRelation relation
)

Parameters

relation
Type: System.Data.DataRelation
The DataRelation to use.

Return Value

Type: System.Data.DataRow[]
An array of DataRow objects or an array of length zero.

ExceptionCondition
ArgumentException

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

ArgumentNullException

The row is null.

InvalidConstraintException

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

RowNotInTableException

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
                Console.WriteLine(arrRows(i)(column.ColumnName))
             Next column
          Next i
       Next row
    Next relation
 End Sub


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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

Community Additions

ADD
Show:
© 2014 Microsoft