System.Data Namespace   DataRelation Class

Initializes a new instance of the DataRelation class using the specified DataRelation name, and parent and child DataColumn objects.

[ VB ]
Overloads Public Sub New ( _
   ByVal relationName As String, _
   ByVal parentColumn As DataColumn, _
   ByVal childColumn As DataColumn _
)

[ C# ]
public DataRelation (
   string relationName,
   DataColumn parentColumn,
   DataColumn childColumn
);

[ C++ ]
public: DataRelation (
   String* relationName,
   DataColumn* parentColumn,
   DataColumn* childColumn
);

[ JScript ]
public function DataRelation (
   relationName : String,
   parentColumn : DataColumn,
   childColumn : DataColumn
);

relationName

The name of the relation. If a null reference or an empty string ( "" ), a default name will be given when the created object is added to the DataRelationCollection.

parentColumn

The parent DataColumn in the relation.

childColumn

The child DataColumn in the relation.

The following example initializes a new DataRelation using this constructor and adds it to the DataRelationCollection of a DataSet.

DataRelation categoryId = new DataRelation ( "categoryId", 
   myDataSet.Tables [ "Categories" ].Columns [ "CategoryID" ],
   myDataSet.Tables [ "Products" ].Columns [ "CategoryID" ] );

   // add the relation to the DataSet.
   myDataSet.Relations.Add ( categoryId );

Dim categoryId As New DataRelation ( "categoryId", _
   myDataSet.Tables ( "Categories" ).Columns ( "CategoryID" ), _
   myDataSet.Tables ( "Products" ).Columns ( "CategoryID" ) )

   ' add the relation to the DataSet.
   myDataSet.Relations.Add ( categoryId )

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DataRelation Members   DataRelation Constructor Overload List   DataColumn   RelationName