如果跨应用程序域访问类中的静态数据，该怎么办？ [英] What happens to the static data in a class if it is accessed across app domains?

问题描述

我有一个静态类，其中包含一些静态数据。如果从不同的应用程序域访问数据，该怎么办？

I have a static class which has some static data. What happens to the data if its accessed from different app domain?

1. 每个域都会有一个静态类的副本吗？

1. Will there a copy of a static class for each domain?

将复制原始类型吗？

如果数据可序列化怎么办？

What if the data is serializable?

推荐答案

AppDomain之间的内存不共享。默认情况下，对象是深层克隆，如果它们是MarshalByRef，则其类似于在AppDomain上执行调用的远程处理，因此看起来是其共享状态。

The memory between AppDomain's is not shared. By default the objects are a deep clone, if they are MarshalByRef then its similar to remoting where the calls are executed across AppDomain, so it appears that its shared state.

MarshalByRefObject 是通过交换跨应用程序域边界进行通信的对象的基类使用代理的邮件。不继承自 MarshalByRefObject 的对象按值隐式封送。当远程应用程序引用按值编组对象时，该对象的副本将跨应用程序域边界传递。

MarshalByRefObject is the base class for objects that communicate across application domain boundaries by exchanging messages using a proxy. Objects that do not inherit from MarshalByRefObject are implicitly marshal by value. When a remote application references a marshal by value object, a copy of the object is passed across application domain boundaries.

我不相信您实际上可以使用AppDomain方法调用静态成员，最好的选择是将静态调用包装在实例类中并使用 DoCallback 以便在另一个域中执行该代码并在 MarshalByRef 对象。

I don't believe you can actually invoke static members using the AppDomain methods, your best bet would be to wrap the static calls in an instance class and use DoCallback to execute that code in the other domain and collect the state in a MarshalByRef object.

请参见 MSDN

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