DeliveryRequirementsAttribute Class

Definition

public ref class DeliveryRequirementsAttribute sealed : Attribute, System::ServiceModel::Description::IContractBehavior

public ref class DeliveryRequirementsAttribute sealed : Attribute, System::ServiceModel::Description::IContractBehavior, System::ServiceModel::Description::IContractBehaviorAttribute

public sealed class DeliveryRequirementsAttribute : Attribute, System.ServiceModel.Description.IContractBehavior

type DeliveryRequirementsAttribute = class
    inherit Attribute
    interface IContractBehavior

Public NotInheritable Class DeliveryRequirementsAttribute
Inherits Attribute
Implements IContractBehavior

Public NotInheritable Class DeliveryRequirementsAttribute
Inherits Attribute
Implements IContractBehavior, IContractBehaviorAttribute

Inheritance

Object

Attribute

DeliveryRequirementsAttribute

Attributes

AttributeUsageAttribute

Implements

IContractBehavior IContractBehaviorAttribute

Examples

using System;
using System.ServiceModel;

[ServiceContract]
interface ICalculatorService
{
  [OperationBehavior()]
  int Add(int a, int b);

  [OperationContract]
  int Subtract(int a, int b);
}

[DeliveryRequirementsAttribute(
  QueuedDeliveryRequirements=QueuedDeliveryRequirementsMode.NotAllowed,
  RequireOrderedDelivery=true
)]
class CalculatorService: ICalculatorService
{
  public int Add(int a, int b)
  {
    Console.WriteLine("Add called.");
    return a + b;
  }

  public int Subtract(int a, int b)
  {
    Console.WriteLine("Subtract called.");
    return a - b;
  }

  public int Multiply(int a, int b)
  {
    return a * b;
  }
}

Imports System.ServiceModel

<ServiceContract()> _
Public Interface ICalculatorService

    <OperationBehavior()> _
    Function Add(ByVal a As Integer, ByVal b As Integer) As Integer

    <OperationContract()> _
    Function Subtract(ByVal a As Integer, ByVal b As Integer) As Integer
End Interface

<DeliveryRequirements( _
    QueuedDeliveryRequirements:=QueuedDeliveryRequirementsMode.NotAllowed, _
    RequireOrderedDelivery:=True _
)> _
Class CalculatorService
    Public Function add(ByVal a As Integer, ByVal b As Integer) As Integer
        Console.WriteLine("Add called")
        Return a + b
    End Function

    Public Function Subtract(ByVal a As Integer, ByVal b As Integer) As Integer
        Console.WriteLine("Subtract called.")
        Return a - b
    End Function

    Public Function Multiply(ByVal a As Integer, ByVal b As Integer) As Integer
        Return a * b
    End Function
End Class

Remarks

Use the DeliveryRequirementsAttribute to instruct Windows Communication Foundation (WCF) to confirm that the binding provides the features required by the service or client implementation. If a DeliveryRequirementsAttribute attribute is detected when a service description is loaded from an application configuration file or built programmatically in code, WCF validates the configured binding and supports all the features that the attribute specifies. For example, your service may require the bindings to support queuing. Using DeliveryRequirementsAttribute allows WCF to confirm that the following requirements are met:

• The QueuedDeliveryRequirements property specifies the queuing requirements that a binding must meet.

• The RequireOrderedDelivery property indicates whether the binding must support ordered messaging.

• The TargetContract property indicates to which type the requirements apply.

The DeliveryRequirementsAttribute attribute is applied to a class, which can implement any number of service contract interfaces. DeliveryRequirementsAttribute can be applied to all the contracts the class implements or to only one of them. The attribute can be applied to a class more than once.