线程锁定CollectionViewSource

Question

我在代码中添加了一个事件处理程序，它中断了对SystemHTA类中CollectionViewSources的所有访问，声明“调用线程无法访问此对象，因为另一个线程拥有它”。当"this.systemHTA = new SystemHTA();“被放在DeviceManager_StateChanged()函数的外部时，我的类正在工作。

    public partial class MainWindow : Window
    {
        private DeviceManager DeviceManager = DeviceManager.Instance;
        public SystemHTA systemHTA;

        public MainWindow()
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            DeviceManager.StateChanged += new EventHandler<DeviceManagerStateChangedEventArgs>(DeviceManager_StateChanged);
            DeviceManager.Initialize();
        }

        void DeviceManager_StateChanged(object sender, DeviceManagerStateChangedEventArgs e)
        {
            if (e.State == DeviceManagerState.Operational)
            {
                this.systemHTA = new SystemHTA();
            }
        }

        private void button1_Click(object sender, RoutedEventArgs e)
        {
            this.systemHTA.GetViewSourceTest();
        }
    }


    public class SystemHTA
    {
        private CollectionViewSource _deviceTestSource;

        public SystemHTA()
        {
            _deviceTestSource = new CollectionViewSource();
            _deviceTestSource.Source = CreateLoadData<HWController>.ControllerCollection;
        }

        public void GetViewSourceTest()
        {
            ListCollectionView view = (ListCollectionView)_deviceTestSource.View; //This creates an error saying a thread already owns _deviceTestSource
        }
    }

Answer 1

我最终用ObservableCollection替换了CollectionViewSource，一切工作正常。

Answer 2

这不是关于“线程锁定”，而是关于一个众所周知的问题，即图形用户界面(无论是WPF还是WinForms)不是线程安全的，并且在调试版本中有对跨线程调用的主动检查。

因此，您已经知道解决方案:在主线程上创建SystemHTA对象。你的问题可能会转移到从DeviceMgr加载它，你可能不得不在这里使用Control.Dispatcher.Invoke()。