/// <summary>
/// Cancels the operation.
/// </summary>
private void OnCancel()
{
if (IsRunning)
{
Log.Add("Canceling execution.");
_invoker.CancelAsync(this);
}
}
// CancelAsync
static void snippet34()
{
//<snippet34>
AutoResetEvent syncEvent = new AutoResetEvent(false);
WorkflowInvoker invoker = new WorkflowInvoker(new LongRunningDiceRoll());
invoker.InvokeCompleted += delegate(object sender, InvokeCompletedEventArgs args)
{
if (args.Cancelled == true)
{
Console.WriteLine("The 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();
};
string userState = "CancelAsync Example";
invoker.InvokeAsync(userState);
Console.WriteLine("Waiting for the workflow to complete.");
Thread.Sleep(TimeSpan.FromSeconds(1));
Console.WriteLine("Attempting to cancel the workflow.");
invoker.CancelAsync(userState);
// Wait for the workflow to complete.
syncEvent.WaitOne();
Console.WriteLine("The workflow is either completed or cancelled.");
//</snippet34>
}
