如何对 mef 中的双重加载对象进行故障排除
我遇到的问题是我的对象在 MEF 中加载了两次。因此 MEF 返回了我的两个对象，这导致我的整个程序崩溃，因为我只期望一个。
如何跟踪/单步执行我的程序以找出对象被双重注册的位置？
我的班级有一个导出标签。我认为这就是其中之一。
我正在使用棱镜，出现两次的对象是壳视图。
TDL 无法弄清楚如何调试 mef
I have an issue where my object is loaded twice in MEF. So MEF returns two of my object, which causes my entire program to crash because I am expecting only one.
How can I trace through/step through my program to figure out where the objects are being double registered?
I have an Export tag on the class. I assume this accounts for one of the instances.
I am using prism and the object that appears twice is the Shell view.
TDL having trouble figuring out how to debug mef
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当您组合对象时，MEF 将引发 CompositionException 当它尝试组成与类型匹配的
[Import]时。 CompositionException 的异常详细信息非常详细，将为您提供潜在的匹配项。查看 CompositionException 的全文 - 它应该为您提供给定导入发生的所有“匹配”，以便您调试问题。
When you compose the object, MEF will raise a CompositionException when it tries to compose the
[Import]matching the type. The exception details of the CompositionException are very detailed, and will give you the potential matches.Look at the full text of the CompositionException - it should provide you with all of the "matches" that are occurring for a given import, allowing you to debug the issue.
我敢说您以某种方式将程序集两次加载到 AggregateCatalog 中。
I'd venture to say you loaded the Assembly twice into the AggregateCatalog somehow.