WorkflowApplication.Run 方法

定义

命名空间:

System.Activities

程序集:

System.Activities.dll

开始或恢复执行工作流实例。

重载

Run()	开始或恢复执行工作流实例。
Run(TimeSpan)	使用指定的超时间隔开始或恢复执行工作流实例。

注解

调用此方法可开始执行新创建的工作流实例。

Run()

开始或恢复执行工作流实例。

public:
 void Run();

public void Run ();

member this.Run : unit -> unit

Public Sub Run ()

示例

下面的示例使用 WorkflowApplication 承载一个工作流。 该示例使用指定的工作流定义构造 WorkflowApplication，处理所需的工作流生命周期事件，并通过调用 Run 来调用工作流。 完成工作流时，会向控制台显示以下输出。

Starting the workflow.   
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Idle.   
Ending the workflow.   
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Completed  
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Unloaded.  

Activity wf = new Sequence
{
    Activities =
     {
         new WriteLine
         {
             Text = "Starting the workflow."
         },
         new Delay
         {
             Duration = TimeSpan.FromSeconds(5)
         },
         new WriteLine
         {
             Text = "Ending the workflow."
         }
     }
};

// Create a WorkflowApplication instance.
WorkflowApplication wfApp = new WorkflowApplication(wf);

// Subscribe to any desired workflow lifecycle events.
wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
{
    if (e.CompletionState == ActivityInstanceState.Faulted)
    {
        Console.WriteLine("Workflow {0} Terminated.", e.InstanceId);
        Console.WriteLine("Exception: {0}\n{1}",
            e.TerminationException.GetType().FullName,
            e.TerminationException.Message);
    }
    else if (e.CompletionState == ActivityInstanceState.Canceled)
    {
        Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
    }
    else
    {
        Console.WriteLine("Workflow {0} Completed.", e.InstanceId);

        // Outputs can be retrieved from the Outputs dictionary,
        // keyed by argument name.
        // Console.WriteLine("The winner is {0}.", e.Outputs["Winner"]);
    }
};

wfApp.Aborted = delegate(WorkflowApplicationAbortedEventArgs e)
{
    // Display the exception that caused the workflow
    // to abort.
    Console.WriteLine("Workflow {0} Aborted.", e.InstanceId);
    Console.WriteLine("Exception: {0}\n{1}",
        e.Reason.GetType().FullName,
        e.Reason.Message);
};

wfApp.Idle = delegate(WorkflowApplicationIdleEventArgs e)
{
    // Perform any processing that should occur
    // when a workflow goes idle. If the workflow can persist,
    // both Idle and PersistableIdle are called in that order.
    Console.WriteLine("Workflow {0} Idle.", e.InstanceId);
};

wfApp.PersistableIdle = delegate(WorkflowApplicationIdleEventArgs e)
{
    // Instruct the runtime to persist and unload the workflow
    return PersistableIdleAction.Unload;
};

wfApp.Unloaded = delegate(WorkflowApplicationEventArgs e)
{
    Console.WriteLine("Workflow {0} Unloaded.", e.InstanceId);
};

wfApp.OnUnhandledException = delegate(WorkflowApplicationUnhandledExceptionEventArgs e)
{
    // Display the unhandled exception.
    Console.WriteLine("OnUnhandledException in Workflow {0}\n{1}",
        e.InstanceId, e.UnhandledException.Message);

    Console.WriteLine("ExceptionSource: {0} - {1}",
        e.ExceptionSource.DisplayName, e.ExceptionSourceInstanceId);

    // Instruct the runtime to terminate the workflow.
    // Other choices are Abort and Cancel
    return UnhandledExceptionAction.Terminate;
};

// Run the workflow.
wfApp.Run();

注解

调用此方法可开始执行新创建的工作流实例。

如果运行操作未在 30 秒内完成，则将引发 TimeoutException。

Run(TimeSpan)

使用指定的超时间隔开始或恢复执行工作流实例。

public:
 void Run(TimeSpan timeout);

public void Run (TimeSpan timeout);

member this.Run : TimeSpan -> unit

Public Sub Run (timeout As TimeSpan)

参数

timeout

TimeSpan

调用此方法可开始执行新创建的工作流实例。

必须在此时间内完成运行操作的时间间隔，否则，将取消该操作并引发 TimeoutException。

示例

下面的示例使用 WorkflowApplication 承载一个工作流。 该示例使用指定的工作流定义构造 WorkflowApplication，处理所需的工作流生命周期事件，并通过调用 Run 来调用工作流。 完成工作流时，会向控制台显示以下输出。

Starting the workflow.   
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Idle.   
Ending the workflow.   
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Completed  
Workflow 593976e8-558d-4989-94d6-50a14b34fd7b Unloaded.  

Activity wf = new Sequence
{
    Activities =
     {
         new WriteLine
         {
             Text = "Starting the workflow."
         },
         new Delay
         {
             Duration = TimeSpan.FromSeconds(5)
         },
         new WriteLine
         {
             Text = "Ending the workflow."
         }
     }
};

// Create a WorkflowApplication instance.
WorkflowApplication wfApp = new WorkflowApplication(wf);

// Subscribe to any desired workflow lifecycle events.
wfApp.Completed = delegate(WorkflowApplicationCompletedEventArgs e)
{
    if (e.CompletionState == ActivityInstanceState.Faulted)
    {
        Console.WriteLine("Workflow {0} Terminated.", e.InstanceId);
        Console.WriteLine("Exception: {0}\n{1}",
            e.TerminationException.GetType().FullName,
            e.TerminationException.Message);
    }
    else if (e.CompletionState == ActivityInstanceState.Canceled)
    {
        Console.WriteLine("Workflow {0} Canceled.", e.InstanceId);
    }
    else
    {
        Console.WriteLine("Workflow {0} Completed.", e.InstanceId);

        // Outputs can be retrieved from the Outputs dictionary,
        // keyed by argument name.
        // Console.WriteLine("The winner is {0}.", e.Outputs["Winner"]);
    }
};

wfApp.Aborted = delegate(WorkflowApplicationAbortedEventArgs e)
{
    // Display the exception that caused the workflow
    // to abort.
    Console.WriteLine("Workflow {0} Aborted.", e.InstanceId);
    Console.WriteLine("Exception: {0}\n{1}",
        e.Reason.GetType().FullName,
        e.Reason.Message);
};

wfApp.Idle = delegate(WorkflowApplicationIdleEventArgs e)
{
    // Perform any processing that should occur
    // when a workflow goes idle. If the workflow can persist,
    // both Idle and PersistableIdle are called in that order.
    Console.WriteLine("Workflow {0} Idle.", e.InstanceId);
};

wfApp.PersistableIdle = delegate(WorkflowApplicationIdleEventArgs e)
{
    // Instruct the runtime to persist and unload the workflow
    return PersistableIdleAction.Unload;
};

wfApp.Unloaded = delegate(WorkflowApplicationEventArgs e)
{
    Console.WriteLine("Workflow {0} Unloaded.", e.InstanceId);
};

wfApp.OnUnhandledException = delegate(WorkflowApplicationUnhandledExceptionEventArgs e)
{
    // Display the unhandled exception.
    Console.WriteLine("OnUnhandledException in Workflow {0}\n{1}",
        e.InstanceId, e.UnhandledException.Message);

    Console.WriteLine("ExceptionSource: {0} - {1}",
        e.ExceptionSource.DisplayName, e.ExceptionSourceInstanceId);

    // Instruct the runtime to terminate the workflow.
    // Other choices are Abort and Cancel
    return UnhandledExceptionAction.Terminate;
};

// Run the workflow.
wfApp.Run();

注解

请注意，与 Invoke 不同，此方法将仅在工作流未在指定的时间内启动的情况下（而不是需要在指定的时间内完成）超时。 原因在于，Invoke 以同步方式执行工作流（阻止主机线程），而 Run 以异步方式执行工作流（仅在启动工作流所需的时间内阻止主机线程）。