Question

我运行这个算法，当我在我的GUI上按停止时，它会挂起，然后我按下我的VS暂停，只是为了查看我的代码光标在哪里，它指向或者或多或少地在thread.join（）上敲击。并且内部异常是线程正在等待或者睡眠......这种情况发生了大约30秒，并且GUI稍后正常工作..

如何让gui不挂起而让代码线程运行，一旦完成更改应该反映在GUI上

namespace ILS.PLMOptimization
{
    public class PLMOptimizationLoop : Disposable
    {
        private Thread PLMOptimizerThread;

        private AutoResetEvent stopEvent;

        public IOptimizer Optimizer { get; private set; }

        private static PLMOptimizationLoop instance;

        //Singleton Pattern Used
        public static PLMOptimizationLoop Instance
        {
            get { return (instance ?? (instance = new PLMOptimizationLoop())); }
        }
        protected override void Dispose(bool disposing)
        {
            SafeDispose(ref stopEvent);

            base.Dispose(disposing);
        }

        private void OptimizationThread()
        {
            if (Optimizer == null)
                throw new NullReferenceException("Optimizer");

            Optimizer.Initialize();

            while (true)
            {
                // if stopped externally
                if (this.stopEvent.WaitOne(1000))
                break;

                // execute optimizer, continue to call execute only if the optimizer requires it
                if (this.Optimizer.Execute())
                    continue;

                // set thread to null only if exiting on its own
                // in case stop was called the caller will wait for this thread to exit
                // and then make the thread object null
                this.PLMOptimizerThread = null;
                break;
            }

            Optimizer.Shutdown();
        }

        private PLMOptimizationLoop()
        {
            this.stopEvent = new AutoResetEvent(false);
            this.PLMOptimizerThread = null;
        }

        int a = 0;
        public void Start(IOptimizer optimizer)
        {
            a = 1;
            if (optimizer == null)
                throw new ArgumentNullException("optimizer");

            this.Optimizer = optimizer;

            this.PLMOptimizerThread = new Thread(OptimizationThread);
            this.PLMOptimizerThread.Start();
        }

        public void Stop()
        {
            if (this.PLMOptimizerThread == null)
                return;

            this.stopEvent.Set();

            this.PLMOptimizerThread.Join();// **********the problem seems to be here ****//
            this.PLMOptimizerThread = null;
        }
    }
}

以上代码试图运行我的算法：

namespace ILS.PLMOptimization.Algorithm
{
    public class PLMOptimizationAlgorithm : IOptimizer
    {
        public void Initialize()
        { 
            //somecode here
        } 

        public bool Execute()
        {
            //somecode here
        }

        public void Shutdown()
        {
            //somecode here
        }

        public int ResetLuminaire_To_DefaultStateonSTop()
        {
            //somecode here
        }

        public PLMOptimizationAlgorithm()
        {
            //somecode here
        }
    }
}

Answer 1

如果“Execute”方法需要很长时间，则线程将不会在join-Method中接收stop事件和GUI线程块。如果通过stopEvent发出Cancelation请求信号，则必须更频繁地评估此事件，这也意味着在长时间运行的Execute-Method中。对于此目的，CancellationToken（https://msdn.microsoft.com/de-de/library/dd997364%28v=vs.110%29.aspx）有时更有用，您必须将它传递给每个长时间运行的函数，在本例中为Execute。许多人通过此令牌构建功能支持取消。

如果您想在Optimizer线程中更新WPF-GUI，请使用Dispatcher将请求传递给GUI-Thread：Using the C# Dispatcher

我的代码有什么问题..我的gui挂起

1 个答案: