如何检查的AppDomain被卸载？ [英] How to check if AppDomain is unloaded?

问题描述

我用了一堆物体的通过代理另一个AppDomain中。他们是在一个单独的领域，因为我需要包含这些对象的热插拔组件，所以我卸载一个AppDomain我用它承载组件完成后。

I'm using a bunch of objects in another AppDomain through proxy. They are in a separate domain because I need to hot-swap assemblies that contain those objects, so I Unload an AppDomain after I'm done using the assemblies it's hosting.

我想有时检查，如果我已经在过去卸载一个AppDomain（或莫名其妙地卸载它自己或某事），用于测试目的。有没有办法做到这一点？

I want to check sometimes if I've unloaded an AppDomain in the past (or it somehow got unloaded on its own or something) for testing purposes. Is there a way to do this?

最显而易见的方法就是做东西会抛出一个 AppDomainUnloadedException ，但我希望有一些其他的方式。

The obvious way is to do something that would throw an AppDomainUnloadedException, but I'm hoping there is some other way.

推荐答案

我相信你可以使用存储的参考组合的AppDomain 在某些特定词典< AppDomain中，布尔> 其中布尔是如果加载或卸载，并处理 AppDomain.DomainUnload 事件。

I believe that you can use a combination of storing references of AppDomain in some given Dictionary<AppDomain, bool> where the bool is if its loaded or unloaded, and handle AppDomain.DomainUnload event.

Dictionary<AppDomain, bool> appDomainState = new Dictionary<AppDomain, bool>();

AppDomain appDomain = ...; // AppDomain creation
appDomain.DomainUnload += (sender, e) => appDomainState[appDomain] = false;
appDomainState.Add(appDomain, true);

这样，您就可以检查是否有的AppDomain 卸载：

// "false" is "unloaded"
if(!appDomainState[appDomainReference]) 
{
}

另外，你可以使用 AppDomain.Id 的关键：

Alternatively, you can use AppDomain.Id as key:

Dictionary<int, bool> appDomainState = new Dictionary<int, bool>();

AppDomain appDomain = ...; // AppDomain creation
appDomain.DomainUnload += (sender, e) => appDomainState[appDomain.Id] = false;
appDomainState.Add(appDomain.Id, true);

...和if语句将如下所示：

...and the if statement would look as follows:

// "false" is "unloaded"
if(!appDomainState[someAppDomainId]) 
{
}

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