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ConstraintCollection::Add Method (String, DataColumn, Boolean)

Constructs a new UniqueConstraint with the specified name, DataColumn, and value that indicates whether the column is a primary key, and adds it to the collection.

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

public:
Constraint^ Add(
	String^ name, 
	DataColumn^ column, 
	bool primaryKey
)

Parameters

name
Type: System::String

The name of the UniqueConstraint.

column
Type: System.Data::DataColumn

The DataColumn to which the constraint applies.

primaryKey
Type: System::Boolean

Specifies whether the column should be the primary key. If true, the column will be a primary key column.

Return Value

Type: System.Data::Constraint
A new UniqueConstraint.

ExceptionCondition
ArgumentException

The constraint already belongs to this collection.

-Or-

The constraint belongs to another collection.

DuplicateNameException

The collection already has a constraint with the specified name. (The comparison is not case-sensitive.)

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.

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

.NET Framework

Supported in: 4.5.2, 4.5.1, 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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