System.Data Namespace   ConstraintCollection Class

Constructs a new UniqueConstraint, using the specified DataColumn, and adds it to the collection.

[ VB ]
Overridable Overloads Public Function Add ( _
   ByVal name As String, _
   ByVal column As DataColumn, _
   ByVal primaryKey As Boolean _
) As Constraint

[ C# ]
public virtual Constraint Add (
   String name,
   DataColumn column,
   bool primaryKey
);

[ C++ ]
public: virtual Constraint* Add (
   String* name,
   DataColumn* column,
   bool primaryKey
);

[ JScript ]
public function Add (
   name : String,
   column : DataColumn,
   primaryKey : Boolean
) : Constraint

name

The name of the UniqueConstraint.

column

The DataColumn affected by the constraint.

primaryKey

Indicates whether the column is a primary key column. true if the column is a primary key column; otherwise, false.

The CollectionChanged event occurs if the constraint is added successfully.

The following example uses the Add method to create and add a new UniqueConstraint to a ConstraintCollection.

private void AddUniqueConstraint ( DataTable myTable ) {
   myTable.Constraints.Add ( "idConstraint", myTable.Columns ["id"], true );
}

Private Sub AddUniqueConstraint ( myTable As DataTable )
   myTable.Constraints.Add ( "idConstraint", myTable.Columns ( "id" ), True )
End Sub

ConstraintCollection Members   ConstraintCollection.Add Overload List   UniqueConstraint