UniqueConstraint Constructor (String, DataColumn)

UniqueConstraint Constructor (String, DataColumn)


Initializes a new instance of the UniqueConstraint class with the specified name and DataColumn.

Namespace:   System.Data
Assembly:  System.Data (in System.Data.dll)

public UniqueConstraint(
	string name,
	DataColumn column


Type: System.String

The name of the constraint.

Type: System.Data.DataColumn

The DataColumn to constrain.

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

Private Sub CreateUniqueConstraint(ByVal dataSetSuppliers As DataSet)
    Dim uniqueConstraint As UniqueConstraint

    ' Get the DataColumn of a table in a DataSet.
    Dim dataColumn As DataColumn
    dataColumn = dataSetSuppliers.Tables("Suppliers").Columns("SupplierID")

    ' Create the constraint.
    uniqueConstraint = New UniqueConstraint("supplierIdConstraint", dataColumn)

    ' Add the constraint to the ConstraintCollection of the DataTable.
End Sub

.NET Framework
Available since 1.1
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