1. 创建项目组，并添加一个Console Project和Activity Library，在Activity
Library的项目中添加CodeActivity1和CodeActivity2，最终结构如下图所示：
2. CodeActivity1和2的代码如下：
1 public sealed class CodeActivity1 : CodeActivity
2 {
3 // Define an activity input argument of type string
4 public InArgument<string> Text { get; set; }
5
6 // If your activity returns a value, derive from CodeActivity<TResult>
7 // and return the value from the Execute method.
8 protected override void Execute(CodeActivityContext context)
9 {
10 Console.WriteLine("before delay: \‘{0}\‘", DateTime.Now.ToLongTimeString());
11 }
12 }
13
14 public sealed class CodeActivity2 : CodeActivity
15 {
16 // Define an activity input argument of type string
17 public InArgument<string> Text { get; set; }
18
19 // If your activity returns a value, derive from CodeActivity<TResult>
20 // and return the value from the Execute method.
21 protected override void Execute(CodeActivityContext context)
22 {
23 Console.WriteLine("after delay: \‘{0}\‘", DateTime.Now.ToLongTimeString());
24 }
25 }
3. 修改Activity1.xaml如下：
4. 修改Console
Project的program.cs（注意，需要事先引入WorkflowsProject和System.Activities.dll）
1 static void Main(string[] args)
2 {
3 AutoResetEvent syncEvent = new AutoResetEvent(false);
4
5 Activity wf = new WorkflowsProject.Activity1();
6
7 // Create the WorkflowApplication using the desired
8 // workflow definition.
9 WorkflowApplication wfApp = new WorkflowApplication(wf);
10
11 // Handle the desired lifecycle events.
12 wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
13 {
14 Console.WriteLine("Workflow {0} completed.", e.InstanceId.ToString());
15 syncEvent.Set();
16 };
17
18 wfApp.Aborted = delegate(WorkflowApplicationAbortedEventArgs e)
19 {
20 Console.WriteLine("Workflow {0} terminated because {1}", e.InstanceId, e.Reason.Message);
21 syncEvent.Set();
22 };
23
24 // Start the workflow.
25 wfApp.Run();
26
27 // Wait for Completed to arrive and signal that
28 // the workflow is complete.
29 syncEvent.WaitOne();
30
31 // Keep the console screen alive when workflow comnpletes
32 Console.WriteLine("Press enter to continue");
33 Console.Read();
34 }
5. 运行。结果如下：
总结：通过此例，我们可以看到通过WorkflowApplication，我们可以在宿主程序中启动Workflow，并且捕捉Workflow的事件。
时间： 2024-11-08 14:53:57