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通过AEC解读WF的核心原理(14)AEC内部执行ChildActivity
说明
Activity有两种。一种继承自System.Workflow.ComponentModel.Activity,另一种继承自System.Workflow.ComponentModel.CompositeActivity
CompositeActivity是可以有childActivity,
CompositeActivity通过AEC可以对childActivity的执行进行管理
本例演示了:
如何使用CompositeActivity执行ChildActivity,并在ChildActivity执行完成后将自已关闭
本例下载:
http://files.cnblogs.com/wxwinter/aec4.rar
本例涉及到如下内容:
ActivityExecutionContext.ExecuteActivity(childActivity) 方法
CompositeActivity调用ExecuteActivity方法执行ChildActivity
只的 ChildActivity处于Initialized状态时才能调用该方法
引擎会自动执行ChildActivity下面的所有ChildActivity
ActivityExecutionContext.CloseActivity() 方法
将当前执行的Activity切换到Closed状态
只有在生成的所有执行上下文 (CreateExecutionContext) 都已完成 (CompleteExecutionContext) 时,才能将Activity设置成Closed状态
只有在创建完成AEC后才能将Activity设置成Closed状态
只有所有ChildActivity都处于 Closed 或 Initialized 状态时,才能将Activity设置成Closed状态
Activity.Closed事件
在 Activity 完成执行时发生
Activity.EnabledActivities
Activities 的只读子集合
添加到Activities集合中,且Enabled 设为真的Activitie
取消(CancellationHandlerActivity)这类Activitie,为会出现在该集合中
编缉推荐阅读以下文章
- 通过AEC解读WF的核心原理(十三完)实现Visio设计风格的Activity
- 通过AEC解读WF的核心原理(十二)WorkflowQueue的提前提交
- 通过AEC解读WF的核心原理(十一)WF与Windows操作系统的对比
- 通过AEC解读WF的核心原理(十)取消与取消处理器
- 通过AEC解读WF的核心原理(九)实现IEventActivity
- 通过AEC解读WF的核心原理(八)实现Switch功能的Activity
- 通过AEC解读WF的核心原理(七)一个实现Goto功能的Activity
- 通过AEC解读WF的核心原理(六)创建复本ForEach循环
- 通过AEC解读WF的核心原理(五)实现一个从下向上执行的顺序容器
- 通过AEC解读WF的核心原理(三)Execute方法Activity的入口
Activity.RegisterForStatusChange
为状态更改事件注册指定的事件
Activity.UnregisterForStatusChange
注销状态更改事件的指定
ActivityExecutionStatus执行状态
IActivityEventListener<ActivityExecutionStatusChangedEventArgs>接口
监听事件的对象的接口,要实现OnEvent(发生订阅事件时的处理方法)
例1:AEC.ExecuteActivity方法执行childActivity 自定义Activity
public class Activity1 : SequenceActivity
{
public Activity1()
{
InitializeComponent();
}
[System.Diagnostics.DebuggerNonUserCode]
private void InitializeComponent()
{
this.CanModifyActivities = true;
this.codeActivity2 = new System.Workflow.Activities.CodeActivity();
this.codeActivity1 = new System.Workflow.Activities.CodeActivity();
//
// codeActivity2
//
this.codeActivity2.Name = "codeActivity2";
this.codeActivity2.ExecuteCode += new System.EventHandler(this.codeActivity2_ExecuteCode);
//
// codeActivity1
//
this.codeActivity1.Name = "codeActivity1";
this.codeActivity1.ExecuteCode += new System.EventHandler(this.codeActivity1_ExecuteCode);
//
// Activity1
//
this.Activities.Add(this.codeActivity1);
this.Activities.Add(this.codeActivity2);
this.Name = "Activity1";
this.CanModifyActivities = false;
}
private CodeActivity codeActivity2;
private CodeActivity codeActivity1;
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
executionContext.ExecuteActivity(this.codeActivity2);
executionContext.ExecuteActivity(this.codeActivity1);
return ActivityExecutionStatus.Executing;
}
private void codeActivity1_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity1_ExecuteCode");
}
private void codeActivity2_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity2_ExecuteCode");
}
}
编缉推荐阅读以下文章
- 通过AEC解读WF的核心原理(十三完)实现Visio设计风格的Activity
- 通过AEC解读WF的核心原理(十二)WorkflowQueue的提前提交
- 通过AEC解读WF的核心原理(十一)WF与Windows操作系统的对比
- 通过AEC解读WF的核心原理(十)取消与取消处理器
- 通过AEC解读WF的核心原理(九)实现IEventActivity
- 通过AEC解读WF的核心原理(八)实现Switch功能的Activity
- 通过AEC解读WF的核心原理(七)一个实现Goto功能的Activity
- 通过AEC解读WF的核心原理(六)创建复本ForEach循环
- 通过AEC解读WF的核心原理(五)实现一个从下向上执行的顺序容器
- 通过AEC解读WF的核心原理(三)Execute方法Activity的入口
测试用工作流
public class Workflow1: SequentialWorkflowActivity
{
private Activity1 activity11;
public Workflow1()
{
InitializeComponent();
}
[System.Diagnostics.DebuggerNonUserCode]
private void InitializeComponent()
{
this.CanModifyActivities = true;
this.activity11 = new wxwinterAecTest.Activity1();
//
// activity11
//
this.activity11.Name = "activity11";
//
// Workflow1
//
this.Activities.Add(this.activity11);
this.Name = "Workflow1";
this.CanModifyActivities = false;
}
}
宿主
class Program
{
static void Main()
{
WorkflowRuntime workflowRuntime = new WorkflowRuntime();
workflowRuntime.WorkflowCompleted +=new EventHandler<WorkflowCompletedEventArgs>(workflowRuntime_WorkflowCompleted);
workflowRuntime.WorkflowTerminated +=new EventHandler<WorkflowTerminatedEventArgs>(workflowRuntime_WorkflowTerminated);
workflowRuntime.WorkflowIdled+=new EventHandler<WorkflowEventArgs>(workflowRuntime_WorkflowIdled);
WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(Workflow1));
instance.Start();
System.Console.Read();
}
static void workflowRuntime_WorkflowIdled(object sender, WorkflowEventArgs e)
{
System.Console.WriteLine("WorkflowIdled");
}
static void workflowRuntime_WorkflowTerminated(object sender, WorkflowTerminatedEventArgs e)
{
System.Console.WriteLine("Terminated" + e.Exception.Message);
}
static void workflowRuntime_WorkflowCompleted(object sender, WorkflowCompletedEventArgs e)
{
System.Console.WriteLine("WorkflowCompleted");
}
}
编缉推荐阅读以下文章
- 通过AEC解读WF的核心原理(十三完)实现Visio设计风格的Activity
- 通过AEC解读WF的核心原理(十二)WorkflowQueue的提前提交
- 通过AEC解读WF的核心原理(十一)WF与Windows操作系统的对比
- 通过AEC解读WF的核心原理(十)取消与取消处理器
- 通过AEC解读WF的核心原理(九)实现IEventActivity
- 通过AEC解读WF的核心原理(八)实现Switch功能的Activity
- 通过AEC解读WF的核心原理(七)一个实现Goto功能的Activity
- 通过AEC解读WF的核心原理(六)创建复本ForEach循环
- 通过AEC解读WF的核心原理(五)实现一个从下向上执行的顺序容器
- 通过AEC解读WF的核心原理(三)Execute方法Activity的入口
运行结果
例2:Activity.Closed事件通知父容器执行完成 自定义Activity
public class Activity1 : SequenceActivity
{
public Activity1()
{
InitializeComponent();
}
[System.Diagnostics.DebuggerNonUserCode]
private void InitializeComponent()
{
this.CanModifyActivities = true;
this.codeActivity2 = new System.Workflow.Activities.CodeActivity();
this.codeActivity1 = new System.Workflow.Activities.CodeActivity();
//
// codeActivity2
//
this.codeActivity2.Name = "codeActivity2";
this.codeActivity2.ExecuteCode += new System.EventHandler(this.codeActivity2_ExecuteCode);
//
// codeActivity1
//
this.codeActivity1.Name = "codeActivity1";
this.codeActivity1.ExecuteCode += new System.EventHandler(this.codeActivity1_ExecuteCode);
//
// Activity1
//
this.Activities.Add(this.codeActivity1);
this.Activities.Add(this.codeActivity2);
this.Name = "Activity1";
this.CanModifyActivities = false;
}
private CodeActivity codeActivity2;
private CodeActivity codeActivity1;
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
this.codeActivity2.Closed += new EventHandler<ActivityExecutionStatusChangedEventArgs>(codeActivity_Closed);
this.codeActivity1.Closed += new EventHandler<ActivityExecutionStatusChangedEventArgs>(codeActivity_Closed);
executionContext.ExecuteActivity(this.codeActivity2);
executionContext.ExecuteActivity(this.codeActivity1);
return ActivityExecutionStatus.Executing;
}
void codeActivity_Closed(object sender, ActivityExecutionStatusChangedEventArgs e)
{
e.Activity.Closed -= new EventHandler<ActivityExecutionStatusChangedEventArgs>(codeActivity_Closed);
foreach (var v in this.EnabledActivities)
{
if (v.ExecutionStatus != ActivityExecutionStatus.Closed)
{
return;
}
}
ActivityExecutionContext aec = sender as ActivityExecutionContext;
aec.CloseActivity();
}
private void codeActivity1_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity1_ExecuteCode");
}
private void codeActivity2_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity2_ExecuteCode");
}
}
编缉推荐阅读以下文章
- 通过AEC解读WF的核心原理(十三完)实现Visio设计风格的Activity
- 通过AEC解读WF的核心原理(十二)WorkflowQueue的提前提交
- 通过AEC解读WF的核心原理(十一)WF与Windows操作系统的对比
- 通过AEC解读WF的核心原理(十)取消与取消处理器
- 通过AEC解读WF的核心原理(九)实现IEventActivity
- 通过AEC解读WF的核心原理(八)实现Switch功能的Activity
- 通过AEC解读WF的核心原理(七)一个实现Goto功能的Activity
- 通过AEC解读WF的核心原理(六)创建复本ForEach循环
- 通过AEC解读WF的核心原理(五)实现一个从下向上执行的顺序容器
- 通过AEC解读WF的核心原理(三)Execute方法Activity的入口
运行结果
例3:IActivityEventListener<ActivityExecutionStatusChangedEventArgs>接口通知父容器执行完成 自定义Activity
public class Activity1 : SequenceActivity, IActivityEventListener<ActivityExecutionStatusChangedEventArgs>
{
public Activity1()
{
InitializeComponent();
}
[System.Diagnostics.DebuggerNonUserCode]
private void InitializeComponent()
{
this.CanModifyActivities = true;
this.codeActivity2 = new System.Workflow.Activities.CodeActivity();
this.codeActivity1 = new System.Workflow.Activities.CodeActivity();
//
// codeActivity2
//
this.codeActivity2.Name = "codeActivity2";
this.codeActivity2.ExecuteCode += new System.EventHandler(this.codeActivity2_ExecuteCode);
//
// codeActivity1
//
this.codeActivity1.Name = "codeActivity1";
this.codeActivity1.ExecuteCode += new System.EventHandler(this.codeActivity1_ExecuteCode);
//
// Activity1
//
this.Activities.Add(this.codeActivity1);
this.Activities.Add(this.codeActivity2);
this.Name = "Activity1";
this.CanModifyActivities = false;
}
private CodeActivity codeActivity2;
private CodeActivity codeActivity1;
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
this.codeActivity1.RegisterForStatusChange(Activity.ClosedEvent, this);
this.codeActivity2.RegisterForStatusChange(Activity.ClosedEvent, this);
executionContext.ExecuteActivity(this.codeActivity2);
executionContext.ExecuteActivity(this.codeActivity1);
return ActivityExecutionStatus.Executing;
}
private void codeActivity1_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity1_ExecuteCode");
}
private void codeActivity2_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity2_ExecuteCode");
}
void IActivityEventListener<ActivityExecutionStatusChangedEventArgs>.OnEvent(object sender, ActivityExecutionStatusChangedEventArgs e)
{
e.Activity.UnregisterForStatusChange(Activity.ClosedEvent, this);
foreach (var v in this.EnabledActivities)
{
if (v.ExecutionStatus != ActivityExecutionStatus.Closed)
{
return;
}
}
ActivityExecutionContext aec = sender as ActivityExecutionContext;
aec.CloseActivity();
}
}
运行结果
编缉推荐阅读以下文章
- 通过AEC解读WF的核心原理(十三完)实现Visio设计风格的Activity
- 通过AEC解读WF的核心原理(十二)WorkflowQueue的提前提交
- 通过AEC解读WF的核心原理(十一)WF与Windows操作系统的对比
- 通过AEC解读WF的核心原理(十)取消与取消处理器
- 通过AEC解读WF的核心原理(九)实现IEventActivity
- 通过AEC解读WF的核心原理(八)实现Switch功能的Activity
- 通过AEC解读WF的核心原理(七)一个实现Goto功能的Activity
- 通过AEC解读WF的核心原理(六)创建复本ForEach循环
- 通过AEC解读WF的核心原理(五)实现一个从下向上执行的顺序容器
- 通过AEC解读WF的核心原理(三)Execute方法Activity的入口
Activity.RegisterForStatusChange
为状态更改事件注册指定的事件
Activity.UnregisterForStatusChange
注销状态更改事件的指定
ActivityExecutionStatus执行状态
IActivityEventListener<ActivityExecutionStatusChangedEventArgs>接口
监听事件的对象的接口,要实现OnEvent(发生订阅事件时的处理方法)
例1:AEC.ExecuteActivity方法执行childActivity 自定义Activity
public class Activity1 : SequenceActivity
{
public Activity1()
{
InitializeComponent();
}
[System.Diagnostics.DebuggerNonUserCode]
private void InitializeComponent()
{
this.CanModifyActivities = true;
this.codeActivity2 = new System.Workflow.Activities.CodeActivity();
this.codeActivity1 = new System.Workflow.Activities.CodeActivity();
//
// codeActivity2
//
this.codeActivity2.Name = "codeActivity2";
this.codeActivity2.ExecuteCode += new System.EventHandler(this.codeActivity2_ExecuteCode);
//
// codeActivity1
//
this.codeActivity1.Name = "codeActivity1";
this.codeActivity1.ExecuteCode += new System.EventHandler(this.codeActivity1_ExecuteCode);
//
// Activity1
//
this.Activities.Add(this.codeActivity1);
this.Activities.Add(this.codeActivity2);
this.Name = "Activity1";
this.CanModifyActivities = false;
}
private CodeActivity codeActivity2;
private CodeActivity codeActivity1;
protected override ActivityExecutionStatus Execute(ActivityExecutionContext executionContext)
{
executionContext.ExecuteActivity(this.codeActivity2);
executionContext.ExecuteActivity(this.codeActivity1);
return ActivityExecutionStatus.Executing;
}
private void codeActivity1_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity1_ExecuteCode");
}
private void codeActivity2_ExecuteCode(object sender, EventArgs e)
{
System.Console.WriteLine("codeActivity2_ExecuteCode");
}
}