NGWS SDK Documentation  

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UniqueConstraint Constructor (DataColumn)

Initializes a new instance of the UniqueConstraint with the specified DataColumn.

[Visual Basic]
Overloads Public Sub New( _
   ByVal column As DataColumn _
)
[C#]
public UniqueConstraint(
   DataColumn column
);
[C++]
public: UniqueConstraint(
   DataColumn* column
);
[JScript]
public function UniqueConstraint(
   column : DataColumn
);

Parameters

column
The DataColumn to constrain

Example [Visual Basic]

The following example creates a new UniqueConstraint and assigns it to the ParentKeyConstraint property of a DataRelation.

[Visual Basic]

Private Sub CreateUniqueConstraint
   Dim cstrt As UniqueConstraint
   ' Get the DataColumn of a table in a DataSet.
   Dim dc As DataColumn
   Set dc = DataSet1.Tables("Suppliers").Columns("SupplierID")
   ' Create the constraint.
   Set cstrt = New UniqueConstraint(dc)
   ' Add the constraint to a DataRelation of the DataSet.
   DataSet1.Relations.Add cstrt
End Sub

See Also

UniqueConstraint Class | UniqueConstraint Members | System.Data Namespace | UniqueConstraint Constructor Overload List