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UniqueConstraint.Equals Method

Compares this constraint to a second to determine if both are identical.

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

public override bool Equals(
	Object key2
)

Parameters

key2
Type: System.Object

The object to which this UniqueConstraint is compared.

Return Value

Type: System.Boolean
true, if the contraints are equal; otherwise, false.

Two constraints are equal if they constrain the same columns.

The following example compares two UiqueConstraint objects.

Private Sub CompareConstraints()
    Dim constraintCustomerOrders As UniqueConstraint
    Dim constraintOrderDetails As UniqueConstraint
    Dim relationCustomerOrders As DataRelation
    Dim relationOrderDetails As DataRelation

    ' Get a DataRelation from a DataSet.
    relationCustomerOrders = DataSet1.Relations("CustomerOrders")

    '  Get a constraint.
    constraintCustomerOrders = relationCustomerOrders.ParentKeyConstraint

    ' Get a second relation and constraint.
    relationOrderDetails = DataSet1.Relations("OrderDetails")
    constraintOrderDetails = relationOrderDetails.ParentKeyConstraint

    ' Compare the two.
    Console.WriteLine( _
        constraintCustomerOrders.Equals(constraintOrderDetails).ToString())
 End Sub

.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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