CorrelationScope Klass

Definition

public ref class CorrelationScope : System::Activities::NativeActivity

public class CorrelationScope : System.Activities.NativeActivity

type CorrelationScope = class
    inherit NativeActivity

Public Class CorrelationScope
Inherits NativeActivity

Arv

Object

Activity

NativeActivity

CorrelationScope

Exempel

I följande exempel visas hur du skapar en CorrelationScope. Det här exemplet skapar en Sequence och lägger till en CorrelationScope (bland andra aktiviteter). Innehåller CorrelationScope en Sequence som består av en Send och ReceiveReply aktivitet.

return new Sequence
{
    Variables = { po, customer },
    Activities =
    {
        new Assign<PurchaseOrder>
        {
            To = po,
            Value = new InArgument<PurchaseOrder>( (e) => new PurchaseOrder() { PartName = "Widget", Quantity = 150 } )
        },
        new Assign<Customer>
        {
            To = customer,
            Value = new InArgument<Customer>( (e) => new Customer() { Id = 12345678, Name = "John Smith" } )
        },
        new WriteLine { Text = new InArgument<string>( (e) => string.Format("Submitting new PurchaseOrder for {0} {1}s", po.Get(e).Quantity, po.Get(e).PartName) ) },
        new CorrelationScope
        {
            Body = new Sequence
            {
                Activities =
                {
                    submitPO,
                    new ReceiveReply
                    {
                        Request = submitPO,
                        Content = ReceiveContent.Create(new OutArgument<int>( (e) => po.Get(e).Id ))
                    }
                }
            }
        },
        new WriteLine { Text = new InArgument<string>( (e) => string.Format("Received ID for new PO: {0}", po.Get(e).Id) ) },
        new Assign<int> { To = new OutArgument<int>( (e) => po.Get(e).Quantity ), Value = 250 },
        new WriteLine { Text = "Updated PO with new quantity: 250.  Resubmitting updated PurchaseOrder based on POId." },
        new Send
        {
            Endpoint = clientEndpoint,
            ServiceContractName = Constants.POContractName,
            OperationName = Constants.UpdatePOName,
            Content = SendContent.Create(new InArgument<PurchaseOrder>(po))
        },
        new Assign<int>
        {
            To = new OutArgument<int>( (e) => po.Get(e).CustomerId ),
            Value = new InArgument<int>( (e) => customer.Get(e).Id )
        },
        new WriteLine { Text = "Updating customer data based on CustomerId." },
        new Send
        {
            Endpoint = clientEndpoint,
            ServiceContractName = Constants.POContractName,
            OperationName = Constants.AddCustomerInfoName,
            Content = SendContent.Create(new InArgument<PurchaseOrder>(po))
        },
        new Send
        {
            Endpoint = clientEndpoint,
            ServiceContractName = Constants.POContractName,
            OperationName = Constants.UpdateCustomerName,
            Content = SendContent.Create(new InArgument<Customer>(customer))
        },
        new WriteLine { Text = "Client completed." }
    }
};

Kommentarer

Aktiviteten CorrelationScope upprätthåller en implicit CorrelationHandle som endast är synlig för underordnade aktiviteter. När egenskapen CorrelatesWith anges av användaren används den som CorrelationScope implicit handtag. När det gäller kapslade CorrelationScopekan underordnade i det inre omfånget inte komma åt implicit handtag för det yttre omfånget.