共享DLL而不添加参考

Question

I have got a dll placed in a shared folder over development server. Is there any way to use that dll without adding reference in my application and without installing the same in GAC.

Thanks in advance.

Answer 1

Assembly asm = Assembly.LoadFrom(path);

See MSDN for late binding, reflection etc.

Small edit: A variable with the keyword "as" is asking for trouble. So "Assembly as" changed to "Assembly asm" should be safer.

Answer 2

You may want to look at the Managed Extensibility Framework or at Assembly.Load... in the base framework.

Why would you want to do this, though? You'd need to call any code within the Assembly via reflection (hence the suggestion that the MEF may be what you're really after).

Answer 3

Yes, it is possible...somehow. Have a look at the Assembly-Class . With it you can load assemblies from a file without knowing what you exactly load.

Answer 4

Using Assembly.LoadFrom would be the only way to have zero references, but you'd still need to share contracts.

What's the problem with adding a reference?

What are you going to do when someone wants to work on a laptop and the WiFi goes down?

Answer 5

Yes,

you can call Assembly.Load() and then make use of Reflection to call into the public interface (lowercase "interface" - what I mean is the methods, fields and properties) exposed by the assembbly.

But in order to do that you need to know what methods to call. It helps if you can be certain that the assembly includes classes that do conform to a known .NET interface .

This idea is the basis for "plug-in" architectures in many tools, where the tool loads any assembly in its "plugin" directory, instantiates classes, casts the result to an ISomething, and then invokes methods via that interface.

Answer 6

I also would read Suzanne Cook's .NET CLR Notes.

http://blogs.msdn.com/suzcook/default.aspx

Answer 7

If this assembly is in a shared folder, you may find that .NET security restrictions stop you working with classes in that assembly in quite the way you'd expect.

Rather than storing on a shared folder, you may want to consider checking in the assembly to your source code repository. (I've seen a "/lib" folder used to good effect for this). Then you can reference the assembly directly.

(There are also repository solutions such as Maven that can more properly control this. However, they don't play well with .NET, unfortunately.)