[UWP]如何从BackgroundTask更新UI？ UWP [英] [UWP]How do I update the UI from a BackgroundTask? UWP

问题描述

以下是总结的场景...

我有一个后台任务，我打算用它来更新Live Tile和可能的Toasts ......但是;我想依靠该后台任务来更新我的UI。

我有一个UWP（Windows 10通用Windows项目）构建的MVVM 我发现BackgroundTask实际上是与应用程序分开的;这是有道理的。然而;因此，我无法直接更新我的模型，因此最终通过ViewModel将
更新推送到UI。 我知道这是因为我已经测试了它，即使它们都在运行BackgroundTask更新一个不同的模型（因为它是一个完全独立的执行），而不是在运行的App中使用的相同模型。

理解这一点我决定尝试向App发送通知，因此依赖Notification来更新模型。 我似乎无法弄清楚这一点... 

所以...我需要做的是在运行BackgroundTask时更新我的​​UI（当应用程序运行时）。 有什么建议或答案吗？

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爱，赞美，敬拜上帝：）

解决方案

 dispatcher.RunAsync 

https://msdn.microsoft.com/library/windows/apps/windows.ui.core.coredispatcher.runasync.aspx

Here's the summarized scenario...

I have a background task that I intend to use to update the Live Tile and possibly Toasts as well... However; I would like to rely on that background task to update my UI also.

I have a UWP (Windows 10 Universal Windows Project) built MVVM and I've discovered that the BackgroundTask is actually separate than the application; which makes sense. However; as a result I can't directly update my Model and therefore eventually push the update to the UI via a ViewModel.  I know this because I've tested it and even when they are both running the BackgroundTask updates a different Model (because it's a completely separate execution) than the same Model being used within the App running.

So understanding this I decided to try and push a notification to the App and therefore rely on the Notification to update the Model instead.  I can't seem to figure this out... 

So... what I need to do is update my UI (if and when the app is running) when the BackgroundTask is ran.  Any suggestions or answers?

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Love, praise, and worship God :)

解决方案

dispatcher.RunAsync

https://msdn.microsoft.com/library/windows/apps/windows.ui.core.coredispatcher.runasync.aspx

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