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您可以想象一个公开接收活动的 xaml 服务。这是我工作流程中的第一个活动。在这个接收背后有一些简单的活动，如 InitializateCorrelation”、“assign”、“delay”......等等。然后我有一个由活动设计器制作的自定义活动。所以我的主要工作流程中确实有一个代码活动。这个提供拖放区以允许开发人员自定义活动。但我希望此活动首先具有固定的接收活动。此接收必须使用第一个相关句柄进行相关，该句柄是使用在第一次接收中获得的信息初始化的服务。

我的问题是我无法使用在 xaml 中初始化的相关句柄来关联代码活动中的接收。当我调用第二个接收（代码接收）时出现超时错误。

你知道出了什么问题吗？

这是我的代码活动的代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Activities;
using System.ComponentModel;
using WF4ActivityDesignerLibrary.ActivityDesigner;
using System.Xml.Linq;
using System.ServiceModel.Activities;
using System.ServiceModel;
using System.Activities.Statements;

namespace WF4ActivityDesignerLibrary.Activities
{
    [Designer(typeof(ContainerWithMultipleActivitiesDesigner))]
    public class ActivityWithMultipleChild : NativeActivity
    {

        public List<Activity> Activities { get; set; }
        private Receive ReceiveCancel { get; set; }
        private SendReply ReplyCancel { get; set; }
        private CorrelationScope Scope { get; set; }
        public InArgument<System.ServiceModel.Activities.CorrelationHandle> HandleToCorrelate { get; set; }
        private Variable<CorrelationHandle> CorrelationHandle { get; set; }
        private Variable<string> orderid = new Variable<string> { Name = "orderid" };



        //public SendReply SendReplyCancel { get; set; }

        public ActivityWithMultipleChild()
        {
            Activities = new List<Activity>();
            InitializeReceiveAndReply();
        }

        private void InitializeReceiveAndReply()
        {
            CorrelationHandle = new Variable<CorrelationHandle>("SenseProcessCorrelationHandle");



            ReceiveCancel = new Receive
            {
                CanCreateInstance = false,
                ServiceContractName = "IOrderService",
                OperationName = "StartOrder",
                CorrelatesWith = HandleToCorrelate,
                ProtectionLevel = System.Net.Security.ProtectionLevel.None,
                SerializerOption = System.ServiceModel.Activities.SerializerOption.DataContractSerializer,
                DisplayName = "Segundo Receive",
                CorrelatesOn = new MessageQuerySet
                                {
                                    { "key1", new XPathMessageQuery("string('11445')")  }
                                },

                Content = new ReceiveParametersContent()
                {
                    Parameters = { { "orderid", new OutArgument<string>(this.orderid) } }
                },

                CorrelationInitializers =
                        {
                            new RequestReplyCorrelationInitializer
                            {
                                CorrelationHandle = CorrelationHandle,
                            }
                        }
            };



            ReplyCancel = new SendReply
            {
                Request = ReceiveCancel,
                PersistBeforeSend = true,
                Content = SendParametersContent.Create(new Dictionary<string, InArgument> { { "OrderId", new InArgument<string>((env) => "asdf") } })

            };

        }


        protected override void CacheMetadata(NativeActivityMetadata metadata)
        {
            base.CacheMetadata(metadata);
            metadata.AddVariable(this.orderid);
            metadata.AddChild(ReceiveCancel);
            metadata.AddChild(ReplyCancel);
            metadata.AddVariable(CorrelationHandle);
        }


        protected override void Execute(NativeActivityContext context)
        {
            ReceiveCancel.CorrelatesWith = context.GetValue<CorrelationHandle>(HandleToCorrelate);
            context.ScheduleActivity(ReceiveCancel, OnReceiveCompleted);
            Activities.Reverse(0, Activities.Count);
        }

        void OnReceiveCompleted(NativeActivityContext context, ActivityInstance inst)
        {
            foreach (Activity act in Activities)
            {
                context.ScheduleActivity(act);
            }
            context.ScheduleActivity(ReplyCancel);
        }

    }
}
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