如何避免这种异常? [英] How to avoid this exception?

问题描述

大家好，

[复制步骤]
1.创建一个新的UnitTest项目
2.在TEST_METHOD范围内输入这些代码

 Windows :: UI :: Xaml :: Media :: Imaging :: BitmapImage ^ FileThumbnail;
FileThumbnail =引用新的Windows :: UI :: Xaml :: Media :: Imaging :: BitmapImage(); 

3.运行UnitTest
4.获取异常
消息:未处理的WinRT异常:Platform :: WrongThreadException

此异常应由ref new BitmapImage()引起
但我不知道该如何处理

我的问题:
为什么会发生此异常?
如何避免这种异常?

谢谢

解决方案

Windows :: UI :: Xaml元素(例如BitmapImage)需要在您的UI线程上创建.

我不确定如何(或是否)可以通过UnitTest进行此操作，但是测试工具"论坛中的某人可能可以提供帮助.

-Rob

Hi all,

[Reproduce Step]
1.Create a new UnitTest project
2.Input these code in TEST_METHOD scope

Windows::UI::Xaml::Media::Imaging::BitmapImage^ FileThumbnail;
FileThumbnail = ref new Windows::UI::Xaml::Media::Imaging::BitmapImage();

3. Run UnitTest
4. Get exception
Message: Unhandled WinRT Exception: Platform::WrongThreadException

This exception should be cause by ref new BitmapImage()
But I don't know how to handle this section

My question:
Why occur this exception?
How to avoid this exception? 

Thanks

解决方案

Windows::UI::Xaml elements such as BitmapImage need to be created on your UI thread.

I'm not sure how (or if) you can do this from a UnitTest, but somebody in the Test Tools forum may be able to help with that.

--Rob

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