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Add Method (String, DataColumn, Boolean)

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: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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