Dynamics crm 2011 工作流上下文系统.NullReferenceException

在我的工作流程中，从营销列表中插入或删除联系人。根据输入的布尔参数值。 正确->插入 ->如果有联系 然后返回 ->否则 错误->删除 ->如果不存在 然后返回

本WFA以事件为基础运行

在第一次点火时，它工作正常，移除或添加触点。但我重新运行更改布尔值，得到以下异常消息：

工作流因错误而暂停：未处理的异常： System.NullReferenceException:对象引用未设置为实例 指一个物体。在 ContactToMList.ContactToMList.Execute（CodeActivityContext 执行上下文）在 System.Activities.CodeActivity.InternalExecute（ActivityInstance 实例、活动执行器执行器、书签管理器书签管理器） 在 System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody（ActivityExecutor

执行者、书签管理器书签管理器、位置结果位置）

这似乎与上下文无关

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Crm.Sdk.Messages;
using Microsoft.Xrm.Sdk;
using Microsoft.Xrm.Sdk.Workflow;
using System.Activities;
using ContactToMList;

namespace ContactToMList
{
   public class ContactToMList : CodeActivity
    {


        [Input("Contatto")]
        [ReferenceTarget("contact")]
        public InArgument<EntityReference> contact { get; set; }

        [Input("Marketing List")]
        [ReferenceTarget("list")]
        public InArgument<EntityReference> MList { get; set; }

        [Input("Inserimento")]
        public InArgument<bool> inserimento { get; set; }

        bool action = false;
        private static string _logs = string.Empty; 
        private static IOrganizationService myService = null;
        private static string _separataore = "\r\n"; 
        private static Log_Entity log = new Log_Entity(string.Empty, myService);
        protected override void Execute(CodeActivityContext executionContext)
        {
            try
            {

                ITracingService tracingService = executionContext.GetExtension<ITracingService>();

                // Create the context
                IWorkflowContext context = executionContext.GetExtension<IWorkflowContext>();

                IOrganizationServiceFactory serviceFactory = executionContext.GetExtension<IOrganizationServiceFactory>();

                // Create the Organiztion service
                IOrganizationService service = serviceFactory.CreateOrganizationService(context.UserId);
                myService = service;
                log.WriteLog("");
                // Get the target entity from the context
               // var target = context.InputParameters["EntityId"];


                Guid contactiId = contact.Get<EntityReference>(executionContext).Id;
                Guid ListId = MList.Get<EntityReference>(executionContext).Id;
                bool insert = inserimento.Get<bool>(executionContext);


                // Prepare DataContext by using AutoGenerated cs file
                XrmDataContext datacontext = new XrmDataContext(service);

                var MyContact = (from c in datacontext.ContactSet where c.ContactId == contactiId select c.Id).ToArray();
                var MyList = (from l in datacontext.ListSet where l.Id == ListId select l).ToList().FirstOrDefault();
                // tutti i membri della lista di marketing
                var members = (from m in datacontext.ListMemberSet where m.ListId.Id == MyList.ListId select m.EntityId.Id).ToArray();


                if (MyList.MemberType == 2)
                {
                    if (MyList.Type.Value == false)
                    {
                        foreach (Guid id in members)
                            if (MyContact.FirstOrDefault() == id)
                                action = true;



                        if (insert && !action)
                        {

                            AddListMembersListRequest AddMemberRequest = new AddListMembersListRequest();

                            AddMemberRequest.ListId = ListId;
                            AddMemberRequest.MemberIds = MyContact;
                            // Use AddListMembersListReponse to get information about the request execution 
                            AddListMembersListResponse AddMemberResponse = service.Execute(AddMemberRequest) as AddListMembersListResponse;
                            //service.Update(MyList);

                        }
                        else if (!insert && action)
                        {

                            RemoveMemberListRequest RemoveMemberRequest = new RemoveMemberListRequest();
                            RemoveMemberRequest.ListId = ListId;
                            RemoveMemberRequest.EntityId = MyContact.FirstOrDefault();
                            // Use AddListMembersListReponse to get information about the request execution 
                            RemoveMemberListResponse RemoveMemberResponse = service.Execute(RemoveMemberRequest) as RemoveMemberListResponse;
                            // service.Update(MyList);

                        }
                    } 
                    else
                    {
                        tracingService.Trace("Stai cercando di inserire un contatto in una lista di Marketing che non è statica.");
                        _logs += "Stai cercando di inserire un contatto in una lista di Marketing che non è statica." + _separataore;
                        return; 

                    }
                }
                else
                {
                    tracingService.Trace("Stai cercando di inserire un enittà diversa da un contatto.");
                    _logs += "Stai cercando di inserire un enittà diversa da un contatto." + _separataore;
                    return;
                }

            }
            catch (Exception ex)
            {
                log.WriteLog(ex.Message);

            }

        }
    }
}

使用系统；
使用System.Collections.Generic；
使用System.Linq；
使用系统文本；
使用Microsoft.Crm.Sdk.Messages；
使用Microsoft.Xrm.Sdk；
使用Microsoft.Xrm.Sdk.Workflow；
使用系统活动；
使用联系人列表；
名称空间联系人列表
{
公共类联系人列表：CodeActivity
{
[输入（“Contatto”）]
[参考目标（“联系”）]
公共InArgument联系人{get；set；}
[输入（“营销列表”）]
[参考目标（“列表”）]
公共InArgument MList{get；set；}
[输入（“插入”）]
公共InArgument插入{get；set；}
布尔动作=假；
私有静态字符串_logs=string.Empty；
私有静态IOR组织服务myService=null；
私有静态字符串\u separataore=“\r\n”；
私有静态日志\实体日志=新日志\实体（string.Empty，myService）；
受保护的覆盖无效执行（CodeActivityContext executionContext）
{
尝试
{
ITracingService tracingService=executionContext.GetExtension（）；
//创建上下文
IWorkflowContext=executionContext.GetExtension（）；
IOOrganizationServiceFactory服务工厂=executionContext.GetExtension（）；
//创建组织服务
IOOrganizationService=serviceFactory.CreateOrganizationService（context.UserId）；
myService=服务；
log.WriteLog（“”）；
//从上下文中获取目标实体
//var target=context.InputParameters[“EntityId”]；
Guid contactiId=contact.Get（executionContext）.Id；
Guid ListId=MList.Get（executionContext.Id）；
bool insert=inserimento.Get（executionContext）；
//使用自动生成的cs文件准备DataContext
XrmDataContext=新的XrmDataContext（服务）；
var MyContact=（来自datacontext.ContactSet中的c，其中c.ContactId==contactiId选择c.Id）.ToArray（）；
var MyList=（从datacontext.ListSet中的l开始，其中l.Id==ListId选择l）；
//市场营销部
var members=（从datacontext.ListMemberSet中的m开始，其中m.ListId.Id==MyList.ListId选择m.EntityId.Id）.ToArray（）；
if（MyList.MemberType==2）
{
if（MyList.Type.Value==false）
{
foreach（成员中的Guid id）
if（MyContact.FirstOrDefault（）==id）
行动=正确；
如果（插入&&！操作）
{
AddListMembersListRequest AddMemberRequest=新的AddListMembersListRequest（）；
AddMemberRequest.ListId=ListId；
AddMemberRequest.MemberId=MyContact；
//使用AddListMembersListResponse获取有关请求执行的信息
AddListMembersResponse AddMemberResponse=服务。作为AddListMembersResponse执行（AddMemberRequest）；
//服务更新（MyList）；
}
else if（！插入和操作）
{
RemoveMemberListRequest RemoveMemberRequest=新RemoveMemberListRequest（）；
RemoveMemberRequest.ListId=ListId；
RemoveMemberRequest.EntityId=MyContact.FirstOrDefault（）；
//使用AddListMembersListResponse获取有关请求执行的信息
RemoveMemberListResponse RemoveMemberResponse=服务。作为RemoveMemberListResponse执行（RemoveMemberRequest）；
//服务更新（MyList）；
}
} 
其他的
{
tracingService.Trace（“在非静态市场营销中的列表中插入的Stai cercando和contatto”）；
_logs+=“在非静态市场营销的列表中插入的内容。”+\u separataore；
返回；
}
}
其他的
{
tracingService.Trace（“水资源管理局”（Stai cercando di inserire un enittádiversa da un contatto.）；
_logs+=“水在水中的流动。”+\u separatore；
返回；
}
}
捕获（例外情况除外）
{
CrmConnection connection = CrmConnection.Parse("Url=http://localhost/trainingorg1; Domain=; Username=; Password=;");
OrganizationService service = new OrganizationService(connection);
string template = "http://localhost/main.aspx?etn={0}&pagetype=entityrecord&id=%7B{1}%7D";

using (TrainingContext svc = new TrainingContext(service))
{
    svc.MergeOption = Microsoft.Xrm.Sdk.Client.MergeOption.NoTracking;

    training_customer customer = svc.training_customerSet.FirstOrDefault(c => c.training_name == "George.Lucas");
    customer.training_SocialSecurityNumber = "123-45-6789";
    svc.Update(customer);

            #region interaction activity
            //try
            //{
            //    training_customer customer = new training_customer
            //        {
            //            EmailAddress = "George.Lucas@Force.net",
            //            training_name = "George.Lucas",
            //            training_UniqueCustomerIdentifier = "George.Lucas"
            //        };
            //    customer.Id = svc.Create(customer);

            //    training_interactiontypemaster typeMaster = new training_interactiontypemaster
            //    {
            //        training_Description = "Indicates an Interaction initiated because a Customer needed to update an Address",
            //        training_InteractionTypeValue = "Address Update"
            //    };
            //    typeMaster.Id = svc.Create(typeMaster);

            //    training_interaction interaction = new training_interaction
            //    {
            //        training_name = "Command Prompt",
            //        training_Customer = customer.ToEntityReference(),
            //        training_Description = typeMaster.training_Description,
            //        training_InteractionType = typeMaster.ToEntityReference()
            //    };

            //    interaction.Id = svc.Create(interaction);
            //    EntityReference reference = interaction.ToEntityReference();
            //    customer.training_Interaction = reference;
            //    svc.Update(customer);

            //    training_interactionactivity activity = new training_interactionactivity
            //    {
            //        training_ActivityName = "Customer Update",
            //        training_Description = "Updating Customer: " + customer.training_name,
            //        training_Interaction = reference,
            //        training_Entity = string.Format(template, customer.LogicalName, customer.Id)
            //    };
            //    activity[customer.LogicalName] = customer.ToEntityReference();
            //    svc.Create(activity);

            //    training_address address = new training_address
            //    {
            //        training_City = "City",
            //        training_Country = "Country",
            //        training_County = "County",
            //        training_Interaction = reference,
            //        training_Street1 = "Street 1",
            //        training_Street2 = "Street 2"
            //    };
            //    address.Id = svc.Create(address);

            //    training_interactionactivity activityTwo = new training_interactionactivity
            //    {
            //        training_Address = address.ToEntityReference(),
            //        training_ActivityName = "Address Update",
            //        training_Description = "Updating the Address for Customer: " + customer.training_name,
            //        training_Interaction = reference,
            //        training_Entity = string.Format(template, address.LogicalName, address.Id)
            //    };
            //    //activityTwo[address.LogicalName] = new CrmEntityReference(training_address.EntityLogicalName, addressId);
            //    svc.Create(activityTwo);
            //}
            //catch (Exception e)
            //{
            //    Console.WriteLine(e.ToString());
            //}
            #endregion
}