通过循环和事件驱动实现的顺序工作流的序列化和反序列化？

Question

 

顺序工作流中通过循环和事件驱动，实现多个“状态”间的跳转。在此工作流中如何序列化和如何加载已序列化的工作流？

设计代码

程序块

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
using System.Reflection;
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;

namespace MaterialWorkflow
{
 partial class MaterialSequentialWorkflow
 {
  #region Designer generated code
  
  ///
  /// Required method for Designer support - do not modify
  /// the contents of this method with the code editor.
  ///
        [System.Diagnostics.DebuggerNonUserCode]
  private void InitializeComponent()
  {
            this.CanModifyActivities = true;
            System.Workflow.Activities.CodeCondition codecondition1 = new System.Workflow.Activities.CodeCondition();
            this.GoBack = new System.Workflow.Activities.CodeActivity();
            this.MatreialManagerAgree = new System.Workflow.Activities.HandleExternalEventActivity();
            this.GoNext = new System.Workflow.Activities.CodeActivity();
            this.MaterialNext = new System.Workflow.Activities.HandleExternalEventActivity();
            this.eventDrivenActivity2 = new System.Workflow.Activities.EventDrivenActivity();
            this.eventDrivenActivity1 = new System.Workflow.Activities.EventDrivenActivity();
            this.listenActivity1 = new System.Workflow.Activities.ListenActivity();
            this.faultHandlersActivity1 = new System.Workflow.ComponentModel.FaultHandlersActivity();
            this.whileActivity1 = new System.Workflow.Activities.WhileActivity();
            //
            // GoBack
            //
            this.GoBack.Name = "GoBack";
            this.GoBack.ExecuteCode += new System.EventHandler(this.GoBack_ExecuteCode);
            //
            // MatreialManagerAgree
            //
            this.MatreialManagerAgree.EventName = "no";
            this.MatreialManagerAgree.InterfaceType = typeof(MaterialWorkflow.MaterialService);
            this.MatreialManagerAgree.Name = "MatreialManagerAgree";
            //
            // GoNext
            //
            this.GoNext.Name = "GoNext";
            this.GoNext.ExecuteCode += new System.EventHandler(this.GoNext_ExecuteCode);
            //
            // MaterialNext
            //
            this.MaterialNext.EventName = "yes";
            this.MaterialNext.InterfaceType = typeof(MaterialWorkflow.MaterialService);
            this.MaterialNext.Name = "MaterialNext";
            //
            // eventDrivenActivity2
            //
            this.eventDrivenActivity2.Activities.Add(this.MatreialManagerAgree);
            this.eventDrivenActivity2.Activities.Add(this.GoBack);
            this.eventDrivenActivity2.Name = "eventDrivenActivity2";
            //
            // eventDrivenActivity1
            //
            this.eventDrivenActivity1.Activities.Add(this.MaterialNext);
            this.eventDrivenActivity1.Activities.Add(this.GoNext);
            this.eventDrivenActivity1.Name = "eventDrivenActivity1";
            //
            // listenActivity1
            //
            this.listenActivity1.Activities.Add(this.eventDrivenActivity1);
            this.listenActivity1.Activities.Add(this.eventDrivenActivity2);
            this.listenActivity1.Name = "listenActivity1";
            //
            // faultHandlersActivity1
            //
            this.faultHandlersActivity1.Name = "faultHandlersActivity1";
            //
            // whileActivity1
            //
            this.whileActivity1.Activities.Add(this.listenActivity1);
            codecondition1.Condition += new System.EventHandler(this.IsStop);
            this.whileActivity1.Condition = codecondition1;
            this.whileActivity1.Name = "whileActivity1";
            //
            // MaterialSequentialWorkflow
            //
            this.Activities.Add(this.whileActivity1);
            this.Activities.Add(this.faultHandlersActivity1);
            this.Name = "MaterialSequentialWorkflow";
            this.CanModifyActivities = false;

  }

  #endregion

        private CodeActivity GoBack;
        private CodeActivity GoNext;
        private HandleExternalEventActivity MatreialManagerAgree;
        private HandleExternalEventActivity MaterialNext;
        private EventDrivenActivity eventDrivenActivity2;
        private EventDrivenActivity eventDrivenActivity1;
        private ListenActivity listenActivity1;
        private WhileActivity whileActivity1;
        private FaultHandlersActivity faultHandlersActivity1;
    }
}

 

 

自定义服务代码

程序块

using System;
using System.Threading;
using System.Workflow.ComponentModel;
using System.Workflow.Runtime;
using System.Workflow.Runtime.Hosting;
using System.Workflow.Activities;
using System.Windows.Forms;
using System.Data;

namespace MaterialWorkflow
{
    [Serializable]
    public class MaterialEventArgs : ExternalDataEventArgs
    {
        public MaterialEventArgs(Guid InstanceID) : base(InstanceID)
        {
        }
    }

    [ExternalDataExchange]
    public interface MaterialService
 {
        event EventHandler<ExternalDataEventArgs> yes;
        event EventHandler<ExternalDataEventArgs> no;
 }
    [Serializable]
    public class IMaterialService : MaterialService
    {
        public event EventHandler<ExternalDataEventArgs> yes;
        public event EventHandler<ExternalDataEventArgs> no;

        public void Next(Guid instanceId )
        {
            ThreadPool.QueueUserWorkItem(GoNext,
                new MaterialEventArgs(instanceId));
        }

        public void Back(Guid instanceId)
        {
            ThreadPool.QueueUserWorkItem(GoBack,
                new MaterialEventArgs(instanceId));
        }

        public void GoNext(object o)
        {
            MaterialEventArgs e = (MaterialEventArgs)o;
            if (yes != null)
            {
                yes(null, e);
            }
            else
            {
                MessageBox.Show("到下一个流程事件为空！");
            }
        }

        public void GoBack(object o)
        {
            MaterialEventArgs e = (MaterialEventArgs)o;
            if (no != null)
            {
                no(null, e);
            }
            else
            {
                MessageBox.Show("返回流程事件为空！");
            }
        }
 
    }
}

 

 

程序代码

程序块

using System;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Collections;
using System.Drawing;
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;

namespace MaterialWorkflow
{
    public sealed partial class MaterialSequentialWorkflow : SequentialWorkflowActivity
    {
        private MaterialState _CurrentState = MaterialState.Apply;
        public MaterialState CurrentState
        {
            get { return _CurrentState; }
            set { _CurrentState = value; }
        }

        private bool _IsDirector;
        ///
        /// 判断是否是由主任批准。
        ///
        public bool IsDirector
        {
            get { return _IsDirector; }
            set { _IsDirector = value; }
        }

        public MaterialSequentialWorkflow()
        {
            InitializeComponent();
        }

        private void StartApply(object sender, ConditionalEventArgs e)
        {
            e.Result = false;
        }

        private void IsStop(object sender, ConditionalEventArgs e)
        {
            if (CurrentState == MaterialState.Over)
            {
                e.Result = false;
            }
            else
            {
                e.Result = true;
            }
        }

        private void GoNext_ExecuteCode(object sender, EventArgs e)
        {
            if (Convert.ToInt32(CurrentState) < Convert.ToInt32(MaterialState.Over))
            {
                if (IsDirector)
                {
                    CurrentState = (MaterialState)(Convert.ToInt32(CurrentState) + 1);
                }
                else
                {
                    if (CurrentState == MaterialState.Apply)
                    {
                        CurrentState = MaterialState.FillTable;
                    }
                    else
                    {
                        CurrentState = (MaterialState)(Convert.ToInt32(CurrentState) + 1);
                    }
                }
            }
        }

        private void GoBack_ExecuteCode(object sender, EventArgs e)
        {
            if (Convert.ToInt32(CurrentState) > 0)
            {
                if (IsDirector)
                {
                    CurrentState = (MaterialState)(Convert.ToInt32(CurrentState) - 1);
                }
                else
                {
                    if (CurrentState == MaterialState.FillTable)
                    {
                        CurrentState = MaterialState.Apply;
                    }
                    else
                    {
                        CurrentState = (MaterialState)(Convert.ToInt32(CurrentState) - 1);
                    }
                }
            }
        }
    }

//状态

    public enum MaterialState
    {
        Apply,
        Checker,
        Director,
        MaterialManager,
        StoreroomManager,
        FillTable,
        TechnologyOffice,
        ProductDirector,
        MaterialDirector,
        Get,
        Over
    }
}