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UniqueConstraint Constructor (String, DataColumn[])

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

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

new : 
        name:string * 
        columns:DataColumn[] -> UniqueConstraint

Parameters

name
Type: System.String

The name of the constraint.

columns
Type: System.Data.DataColumn[]

The array of DataColumn objects to constrain.

The following example creates a DataTable with two columns, and adds a new UniqueConstraint to the ConstraintCollection.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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