Native dll in c# web app

[schueffp at mskcc.org]

Hi Benjamin,

Thanks for the answer, but this does not help. I copied the dll already manually or automatically with the solution, but on runtime, the dll are not found.

The 20 dlls are

iconv.dll
libcairo-2.dll
libffi-6.dll
libgdk_pixbuf-2.0-0.dll
libgio-2.0-0.dll
libglib-2.0-0.dll
libgmodule-2.0-0.dll
libgobject-2.0-0.dll
libgthread-2.0-0.dll
libintl-8.dll
libjpeg-62.dll
libopenjp2.dll
libopenslide-0.dll
libpixman-1-0.dll
libpng16-16.dll
libsqlite3-0.dll
libtiff-5.dll
libxml2-2.dll
openslide-jni.dll
zlib1.dll

Maybe I miss one?

Another question related to that is:

How can I DllImport those libraries? E.g. which function provides libcairo-2.dll?

[DllImport("libcairo-2.dll")]
private static extern whichFunctionshouldBeHere(WhichArguments);


Best,
 Peter


-----Original Message-----
From: openslide-users [mailto:openslide-users-bounces+schueffp=mskcc.org at lists.andrew.cmu.edu] On Behalf Of Benjamin Gilbert via openslide-users
Sent: Wednesday, June 15, 2016 3:01 AM
To: openslide-users at lists.andrew.cmu.edu
Subject: Re: Native dll in c# web app

On Mon, Jun 13, 2016 at 09:59:45PM +0000, Peter via openslide-users wrote:
> I try to make a .net webapp for a openslide viewer.  Openslide depends 
> on
> 20 native c++ libraries which i cannot reference in the c# project 
> (visual studio 2015).  (iconv.dll, libtiff-5.dll, ...)
> 
> It keeps saying that those libraries are not a valid COM assembly.  Or 
> that they do not have an entry point.
> 
> In a normal C# app, I simply would copy the dlls to the /bin folder.  
> Then they are loaded when the program starts.  However, this does not 
> work for a webapp (it keeps saying that openslide or one of its 
> dependencies is not found).

Hi Peter,

I'm not very familiar with Visual Studio, but you may be able to fix this by having it copy the DLLs for you:

    http://stackoverflow.com/a/35960868/
    http://stackoverflow.com/a/5107759/

Does that work?

--Benjamin Gilbert
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