CODEWITHSUNDEEP
c#pinvokedllimport
Rotem
Rotem

Reputation: 21927

P/Invoking to Native DLL with Runtime Filename

For versioning reasons it would be beneficial for me to be able to use p/invoke on a native C++ dll whose filename will be determined at runtime, as such:

[DllImport(myDllFilename)]
private static extern void MyInvokedMethod();

Unfortunately [DllImport] is an attribute and demands a constant expression. Are there any other options for getting around this error?

I am aware I can use identically named files in different folders and load the right one at runtime, but being able to use differently named files would be ideal for my case.

Upvotes: 2

Views: 540

Answers (2)

David Heffernan
David Heffernan

Reputation: 613053

There is no workaround. You will need to use LoadLibrary and GetProcAddress. That's really no fun at all so I'd try to avoid going that way if feasible.

Upvotes: 3

Yahia
Yahia

Reputation: 70369

To achieve what you want you need to PInvoke several things (LoadLibrary and GetProcAddress - see links below)... it is called "late binding native code"... using this is not easy/recommended but it is possible...

Some relevant links with explanations, samples and source code:

Upvotes: 1

Related Questions