在工作流中移除activity

  

在工作流中移除activity

using (WorkflowRuntime workflowRuntime = new WorkflowRuntime())

            {

                AutoResetEvent waitHandle = new AutoResetEvent(false);

                workflowRuntime.WorkflowCompleted += delegate(object sender, WorkflowCompletedEventArgs e) { waitHandle.Set(); };

                workflowRuntime.WorkflowTerminated += delegate(object sender, WorkflowTerminatedEventArgs e)

                {

                    Console.WriteLine(e.Exception.Message);

                    waitHandle.Set();

                };

 

                WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(WorkflowConsoleApplication1.Workflow1));

                instance.Start();

                //     检索此工作流实例的根活动。

                //

                // 返回结果:

                //     一个 System.Workflow.ComponentModel.Activity 对象。

                Activity WFActivity = instance.GetWorkflowDefinition();

                //初始化 System.Workflow.ComponentModel.WorkflowChanges 类的新实例。

                //

                // 参数:

                //   rootActivity:

                //     工作流的根 System.Workflow.ComponentModel.Activity。

                System.Workflow.ComponentModel.WorkflowChanges change = new WorkflowChanges(WFActivity);               

                // 摘要:

                //     获取表示所有子活动的集合 System.Workflow.ComponentModel.ActivityCollection 的对象。

                //

                // 返回结果:

                //     所有子活动的 System.Workflow.ComponentModel.ActivityCollection。

                Activity activity = change.TransientWorkflow.Activities["codeActivity2"];

                change.TransientWorkflow.Activities.Remove(activity);

                instance.ApplyWorkflowChanges(change);

                waitHandle.WaitOne();

                Console.WriteLine(" 工作流执行完毕！");

            }