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DataSet::Relations Property
Visual Studio 2010
Get the collection of relations that link tables and allow navigation from parent tables to child tables.
Assembly: System.Data (in System.Data.dll)
Property Value
Type: System.Data::DataRelationCollectionA DataRelationCollection that contains a collection of DataRelation objects. An empty collection is returned if no DataRelation objects exist.
The following example prints the column name of all child tables through the Relations property.
Private Sub PrintChildRelationRows() ' Declare variable to hold the row values. Dim rowValues As String Dim dataSet As DataSet ' Get the DataSet of a DataGrid that is displaying data ' of at least two tables. Dim table As DataTable = CType(DataGrid1.DataSource, DataTable) ' Navigate using the Relations. Dim relation As DataRelation Dim row As DataRow Dim column As DataColumn ' Print the names of each column in each table. For Each relation In dataSet.Relations For Each column in relation.ChildTable.Columns rowValues &= column.ColumnName & " " Next Next ' Display results. Console.WriteLine(rowValues) End Sub
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.
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