装载程序集在运行时 [英] Loading assemblies at run-time

问题描述

我的项目是我们在其中加载各种组件并对其执行操作的应用程序。

My project is an application in which we load various assemblies and perform operations on them.

我们都停留在一个情况下，我们需要添加一个引用到我们加载程序集（这将是由用户选择）。所以，我需要添加一个引用的DLL在运行时。

We are stuck at a situation where we need to add a reference to the assembly we load (which will be selected by user). So I need to add a reference to the DLL at run time.

我想本网站，但在这里，他们只支持微软的DLL像System.Security程序等。我想添加一个引用到用户创建DLL（类库）。

I tried this site but here they support only microsoft DLLs like System.Security etc. I want to add a reference to a user created dll (class library).

推荐答案

您不能添加引用在运行时 - 但你可以加载组件 - Assembly.LoadFrom / Assembly.LoadFile 等的问题是，你不能的卸载的它们，除非你使用的AppDomain 秒。一旦你有一个组装，您可以使用 assemblyInstance.GetType（fullyQualifiedTypeName）以创建通过反射实例（可以然后转换为已知接口等）。

You can't "add a reference" at runtime - but you can load assemblies - Assembly.LoadFrom / Assembly.LoadFile etc. The problem is that you can't unload them unless you use AppDomains. Once you have an Assembly, you can use assemblyInstance.GetType(fullyQualifiedTypeName) to create instances via reflection (which you can then cast to known interfaces etc).

对于一个简单的例子：

// just a random dll I have locally...
Assembly asm = Assembly.LoadFile(@"d:\protobuf-net.dll");
Type type = asm.GetType("ProtoBuf.ProtoContractAttribute");
object instance = Activator.CreateInstance(type);

在这一点上，我可以投实例一个已知的基准型/接口，或者继续使用反射来操作它。

At which point I can either cast instance to a known base-type/interface, or continue to use reflection to manipulate it.

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