DLLImport path C#

Question

I would like to import my DLL inside my C# class but instead of this:

[DllImport(@"C:\Users\user\Documents\Visual Studio 2010\Projects\KeyDll\Debug\DLLWrap.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "?DivSet@MyCall@MyFunc@@SAPADPAD@Z")]

I would like to locate the path within the project like so:

[DllImport(@"...\Debug\DLLWrap.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "?DivSet@MyCall@MyFunc@@SAPADPAD@Z")]

So that it looks in the local folder the solution is in.

Any suggestions??

Regards

Does this answer your question? [How can I specify a \[DllImport\] path at runtime?](https://stackoverflow.com/questions/8836093/how-can-i-specify-a-dllimport-path-at-runtime) — GSerg, Jan 07 '22 at 12:11

Chibueze Opata · Accepted Answer · 2013-07-17T22:28:36.943

1

You can simply use relative urls like:

[DllImport("DLLWrap.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "?DivSet@MyCall@MyFunc@@SAPADPAD@Z")]

Your application will search working directory (your local folder) for the file by default.

In Winforms, you can always ensure it uses your Working Directory by

[DllImport(Application.StartupPath + "\\DLLWrap.dll", CallingConvention = CallingConvention.Cdecl, EntryPoint = "?DivSet@MyCall@MyFunc@@SAPADPAD@Z")]

edited Jul 17 '13 at 22:28

answered Jul 17 '13 at 22:23

Chibueze Opata

9,856
7
42
65

Thanks do you know which folder it looks in for this? Is it the same folder as the .sln file or is it inside where the .csproj it? – user2577497 Jul 17 '13 at 22:25
No, your debug folder – Chibueze Opata Jul 17 '13 at 22:26
Ah I see thnaks! I would upvote you but I do not have enough "karma" – user2577497 Jul 17 '13 at 22:27
You cannot put an expression such as `Application.StartupPath + "\\DLLWrap.dll"` into an attribute. It requires a constant string. – GSerg Jan 07 '22 at 12:11

score 0 · Answer 2 · answered Jul 17 '13 at 22:03

0

Edit the properties of the DLL to be 'Content' and 'Copy Always'

Reference the DLL in your P/Invoke statements as @"DLLWrap.dll"

answered Jul 17 '13 at 22:03

Pogrindis

7,755
5
31
44

DLLImport path C#

2 Answers2