DeliveryRequirementsAttribute.RequireOrderedDelivery Property

Definition

Namespace:

System.ServiceModel

Assembly:

System.ServiceModel.Primitives.dll

Package:

System.ServiceModel.Primitives v8.1.1

Source:

DeliveryRequirementsAttribute.cs

Specifies whether the binding must support ordered messages.

C#

public bool RequireOrderedDelivery { get; set; }

Property Value

Boolean

true instructs Windows Communication Foundation (WCF) to confirm that the binding must support the ordering of messages; otherwise, false. The default is false.

Examples

The following code example uses the DeliveryRequirementsAttribute attribute to instruct WCF to confirm at runtime that the actual binding does support ordered messages.

C#

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;
  }
}

Remarks

Setting the RequireOrderedDelivery property to false instructs WCF to perform no validation.

Applies to