WP7无效的跨线程访问-ScheduledTaskAgent [英] WP7 Invalid cross-thread access - ScheduledTaskAgent

问题描述

在WP7应用程序中，我正在调用一些代码来从ScheduledAgent类的onInvoke方法更新实时磁贴.

In WP7 app I am calling some code to update a live tile from the onInvoke method on the ScheduledAgent class.

获取无效的跨线程错误.

Getting an invalid cross-thread error.

它失败的行是

var fontForeground = new SolidColorBrush(Colors.White);

我知道在这个后台任务中无法调用ans API，但我仅尝试设置一些东西来生成自己的图像以显示在Live磁贴上.

I understand that there are limitations ans API's that I cannot call from within this background task, but I am only trying to setup some stuff to generate my own image to display on the Live tile.

这里有明显的地方我做错了吗?

Is there something obvious I am doing wrong here.

• 谢谢

更新...

我发现了这个问题

如何在Windows Phone 7中在后台线程的WriteableBitmap上呈现文本?

这是我遇到的同样的问题，尽管这里有一些很好的对话，但似乎没有一个简单的方法可以解决此问题?

It is the same issue that I have and whilst there is some good dialogue on here it doesn't appear that there is an easy way to get around this?

推荐答案

使用Dispatcher在UI线程上而不是在后台线程上执行代码:

Use the Dispatcher to execute the code on the UI thread instead on a background thread:

Deployment.Current.Dispatcher.BeginInvoke(()=>
    { 
         fontForeground  = new SolidColorBrush(Colors.White);
         ...        
   });

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