C# 加载一个 .DLL 文件并从类中访问方法？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/1087794/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Load a .DLL file and access methods from class within?
提问by scrot
I'm completely new to loading in libraries like this, but here's where I stand:
我对加载这样的库完全陌生，但这是我的立场：
I have a homemade DLL file it's about as simple as it gets, the class itself and a method. In the home program that loads this library, I have:
我有一个自制的 DLL 文件，它非常简单，包括类本身和方法。在加载这个库的家庭程序中，我有：
Assembly testDLL = Assembly.LoadFile("C:\dll\test.dll");
From here, I'm kind of stuck. As far as I know, it's loading it correctly because it gives me errors when I change the name.
从这里，我有点卡住了。据我所知，它正在正确加载它，因为当我更改名称时它会给我错误。
What do I do from here? How exactly do I load the class & methods within it?
我从这里做什么？我究竟如何加载其中的类和方法？
Thanks.
谢谢。
采纳答案by Jon Skeet
Use Assembly.GetTypes()to get a collection of all the types, or Assembly.GetType(name)to get a particular type.
使用Assembly.GetTypes()获得所有类型的集合，或者Assembly.GetType(name)得到一个特定的类型。
You can then create an instance of the type with a parameterless constructor using Activator.CreateInstance(type)or get the constructors using Type.GetConstructorsand invoke them to create instances.
然后，您可以使用无参数构造函数 using 创建该类型的实例，Activator.CreateInstance(type)或者获取构造函数 usingType.GetConstructors并调用它们来创建实例。
Likewise you can get methods with Type.GetMethods()etc.
同样，您可以使用Type.GetMethods()etc获取方法。
Basically, once you've got a type there are loads of things you can do - look at the member listfor more information. If you get stuck trying to perform a particular task (generics can be tricky) just ask a specific question an I'm sure we'll be able to help.
基本上，一旦你有了一个类型，你就可以做很多事情——查看成员列表以获取更多信息。如果您在尝试执行特定任务时遇到困难（泛型可能很棘手），请提出一个具体问题，我相信我们能够提供帮助。
回答by Kenan E. K.
If you want to dynamicallyload an assembly, and then invoke methods from classes therein, you need to perform some form of dynamic invoke.
如果要动态加载程序集，然后从其中的类调用方法，则需要执行某种形式的动态调用。
Check herefor basic advice on that.
请在这里为对基本的建议。
The only bit missing is how to get the type itself, which can easily be retrieved wth code like this:
唯一缺少的是如何获取类型本身，可以使用如下代码轻松检索：
foreach (Type t in assemblyToScan.GetTypes())
{
if(condition)
//do stuff
}
And if you simply want to use the assembly statically (by having the assembly available at compile time), then the answer fom Launcy here on this page is the way to go.
如果您只是想静态使用程序集（通过在编译时提供程序集），那么此页面上来自 Launcy 的答案就是您要走的路。
回答by David Basarab
This is how you can get the classes if you know the type.
如果您知道类型，这就是获取类的方法。
Assembly assembly = Assembly.LoadFrom("C:\dll\test.dll");
// Load the object
string fullTypeName = "MyNamespace.YourType";
YourType myType = assembly.CreateInstance(fullTypeName);
The full type name is important. Since you aren't adding the .dll you can't do a Using because it is not in your project.
完整的类型名称很重要。由于您没有添加 .dll，因此您无法使用 Using，因为它不在您的项目中。
If you want all I would just Jon Skeet answer.
如果你想要所有，我只会回答 Jon Skeet。
