UniqueConstraint Constructor (String^, DataColumn^)
.NET Framework (current version)
Initializes a new instance of the UniqueConstraint class with the specified name and DataColumn.
Assembly: System.Data (in System.Data.dll)
Parameters
- name
-
Type:
System::String^
The name of the constraint.
- column
-
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. dataSetSuppliers.Tables("Suppliers").Constraints.Add(uniqueConstraint) End Sub
.NET Framework
Available since 1.1
Available since 1.1
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