WorkflowInvoker.InvokeCompleted Event

Definition

在完成或取消由一种 InvokeAsync 重载调用的工作流时发生。Occurs when the workflow invoked by one of the InvokeAsync overloads is completed or canceled.

public:
 event EventHandler<System::Activities::InvokeCompletedEventArgs ^> ^ InvokeCompleted;
public event EventHandler<System.Activities.InvokeCompletedEventArgs> InvokeCompleted;
member this.InvokeCompleted : EventHandler<System.Activities.InvokeCompletedEventArgs> 
Public Custom Event InvokeCompleted As EventHandler(Of InvokeCompletedEventArgs) 
Public Event InvokeCompleted As EventHandler(Of InvokeCompletedEventArgs) 

Examples

下面的示例调用包含单个 LongRunningDiceRoll 活动的工作流。The following example invokes a workflow consisting of a LongRunningDiceRoll activity. LongRunningDiceRoll 活动包含两个表示掷骰子操作结果的输出自变量。The LongRunningDiceRoll activity has two output arguments that represent the results of the dice roll operation. 当工作流完成时,将在 InvokeCompleted 处理程序中检索这些参数。When the workflow completes these are retrieved in the InvokeCompleted handler.

public sealed class LongRunningDiceRoll : Activity
{
    public OutArgument<int> D1 { get; set; }
    public OutArgument<int> D2 { get; set; }

    public LongRunningDiceRoll()
    {
        this.Implementation = () => new Sequence
        {
            Activities =
            {
                new WriteLine
                {
                    Text = "Rolling the dice for 5 seconds."
                },
                new Delay
                {
                    Duration = TimeSpan.FromSeconds(5)
                },
                new DiceRoll
                {
                    D1 = new OutArgument<int>(env => this.D1.Get(env)),
                    D2 = new OutArgument<int>(env => this.D2.Get(env))
                }
            }
        };
    }
}
AutoResetEvent syncEvent = new AutoResetEvent(false);

WorkflowInvoker invoker = new WorkflowInvoker(new LongRunningDiceRoll());

invoker.InvokeCompleted += delegate(object sender, InvokeCompletedEventArgs args)
{
    if (args.Cancelled == true)
    {
        Console.WriteLine("Workflow was cancelled.");
    }
    else if (args.Error != null)
    {
        Console.WriteLine("Exception: {0}\n{1}",
            args.Error.GetType().FullName,
            args.Error.Message);
    }
    else
    {
        Console.WriteLine("The two dice are {0} and {1}.",
            args.Outputs["D1"], args.Outputs["D2"]);
    }

    syncEvent.Set();
};

invoker.InvokeAsync("InvokeAsync Example");

Console.WriteLine("Waiting for the workflow to complete.");

// Wait for the workflow to complete.
syncEvent.WaitOne();

Console.WriteLine("The workflow is complete.");

Remarks

处理此事件可确定使用 InvokeAsync 重载之一调用的工作流是否成功完成,并检索完成的工作流的输出自变量。Handle this to determine whether a workflow invoked with one of the InvokeAsync overloads completed successfully and to retrieve the output arguments of the completed workflow.

Applies to