WF の使用

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.Linq;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime;
using System.Workflow.Activities;
using System.Workflow.Activities.Rules;
using System.Windows.Forms;

namespace WorkflowLibrary1
{
    public sealed partial class Workflow1: SequentialWorkflowActivity
    {
        public string notCompleteString = "まだ途中です";
        public string completeString = "完了です";

        public Workflow1()
        {
            InitializeComponent();
        }

        DialogResult res = DialogResult.No;
        private void codeActivity1_ExecuteCode(object sender, EventArgs e)
        {
            res = MessageBox.Show("終了しますか", "ワークフローテスト", MessageBoxButtons.YesNo);
        }

        private void LoopCheck(object sender, ConditionalEventArgs e)
        {
            if (res == DialogResult.Yes)
                e.Result = false;
            else
                e.Result = true;
        }
    }

    [ExternalDataExchange]
    public interface ITestExchange
    {
        void CallExternalMethodTest(string stat);
        event EventHandler<ExternalDataEventArgs> handleExternalEventTest;
    }
                
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Workflow.Runtime;
using WorkflowLibrary1;
using System.Workflow.Activities;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        WorkflowRuntime wr = new WorkflowRuntime();
        TestExchangeService testServ;
        private void Form1_Load(object sender, EventArgs e)
        {
            ExternalDataExchangeService exServ = new ExternalDataExchangeService();
            wr.AddService(exServ);
            testServ = new TestExchangeService(this);
            exServ.AddService(testServ);
            wr.StartRuntime();
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            wr.StopRuntime();
        }

        Guid workflowId;
        private void button1_Click(object sender, EventArgs e)
        {
            WorkflowInstance wi = wr.CreateWorkflow(typeof(Workflow1));
            workflowId = wi.InstanceId;
            wi.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            testServ.FireEvent(workflowId);
        }

        public void showMessage(string stat)
        {
            MessageBox.Show(stat);
        }
        delegate void asyncShowMessage(string stat);
        public void invokeShowMessage(string stat)
        {
            Invoke(new asyncShowMessage(showMessage), new object[] { stat });
        }
    }

    public class TestExchangeService : ITestExchange
    {
        Form1 targetForm;
        public TestExchangeService(Form1 form)
        {
            targetForm = form;
        }

        public void CallExternalMethodTest(string stat)
        {
            targetForm.invokeShowMessage(stat);
        }

        public event EventHandler<ExternalDataEventArgs> handleExternalEventTest;

        internal void FireEvent(Guid workflowId)
        {
            handleExternalEventTest.Invoke(null, new ExternalDataEventArgs(workflowId));
        }
    }
                
}