在WinRT中的UI线程上运行代码

Question

如何在WinRT（Windows 8 Metro）中的UI线程上运行代码？

该Invoke方法不存在。

Answer 1

从非UI线程直接获取CoreWindow更容易。以下代码可以在任何地方使用，即使是GetForCurrentThread()或Window.Current返回null。CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,&nbsp; &nbsp; <lambda for your code which should run on the UI thread>);例如：CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,&nbsp; &nbsp; () =>&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; // Your UI update code goes here!&nbsp; &nbsp; });您需要引用Windows.ApplicationModel.Core命名空间：using Windows.ApplicationModel.Core;

Answer 2

使用：从您的UI线程，执行：var dispatcher = Windows.UI.Core.CoreWindow.GetForCurrentThread().Dispatcher;从你的背景（非UI线程）dispatcher.RunAsync(DispatcherPriority.Normal,&nbsp;&nbsp; &nbsp; <lambda for your code which should run on the UI thread>);这应该适用于CP和后期版本。

Answer 3

在我看来，这是一种更容易的方法。获取与UI关联的TaskScheduler。&nbsp; &nbsp; var UISyncContext = TaskScheduler.FromCurrentSynchronizationContext();然后在上面的UISyncContext上启动一个新任务。&nbsp; &nbsp; Task.Factory.StartNew(() => { /* Do your UI stuff here; */}, new System.Threading.CancellationToken(), TaskCreationOptions.PreferFairness, UISyncContext);