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DataRelationCollection.Add Method (String, DataColumn, DataColumn, Boolean)

Creates a DataRelation with the specified name, parent and child columns, with optional constraints according to the value of the createConstraints parameter, and adds it to the collection.

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

Public Overridable Function Add ( _
	name As String, _
	parentColumn As DataColumn, _
	childColumn As DataColumn, _
	createConstraints As Boolean _
) As DataRelation


Type: System.String

The name of the relation.

Type: System.Data.DataColumn

The parent column of the relation.

Type: System.Data.DataColumn

The child column of the relation.

Type: System.Boolean

true to create constraints; otherwise false. (The default is true).

Return Value

Type: System.Data.DataRelation
The created relation.

When a DataRelation object is added to the collection, ForeignKeyConstraint and UniqueConstraint objects are created by default if they do not already exist. To prevent this, you can set createConstraints to false.

.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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