System.Data Namespace   DataRelation Class

Initializes a new instance of the DataRelation class using the specified DataRelation name, and parent and child DataColumn objects, and a value indicating whether to create constraints.

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

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

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

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

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.

createConstraints

A value indicating whether constraints are created. true, if constraints are created, otherwise, false.

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" ], true );

   // 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" ), true )

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

DataRelation Members   DataRelation Constructor Overload List   DataColumn   ForeignKeyConstraint   RelationName

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