Re: [Help-glpk] build glpk.dll for C# so that I can call it from VS2013 on win7.

[usa usa]

Hi,

I have downdloaded GPLK for C# from http://sourceforge.net/projects/glpk-cli/.
I have installed it and passed all install test on win 7.

GLPK version is 1.4.57

Now, I am trying to write a simple C# program from Visual Studio 2013 as follows:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using org.gnu.glpk;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("GLPK " + GLPK.glp_version()); // Got exception here
        }
    }
}

But, I got exception:

An unhandled exception of type 'System.TypeInitializationException' occurred in ConsoleApplication1.exe

Additional information: The type initializer for 'org.gnu.glpk.GLPK' threw an exception.

From the README file of the package, I saw that

"For building and running your own application you will need the following files
from the w64 directory:

* glpk\_?\_??.dll - the GLPK native library
* libglpk\_cli\_native.dll - the GLPK for C#/CLI native library
* libglpk\_cli.dll - the GLPK for C#/CLI assembly"

When I was tryingto add them as reference to my C# prpject , I got:

A reference to "C:\myPATH\glpk_4_57.dll" could not be added.
Please make sure that the file is accessible and that is a vaid assembly or COM component.

i got the same error for libglpk_cli_native.dll.

Only libglpk_cli.dll can be added.

Do I miss something here  ?

Why the installation test can be apssed (printed out GLPK version) but I cannot run the same program from Visual Studion 2013 ?

Any help would be appreciated.

Thanks

On Wed, Sep 16, 2015 at 9:04 AM, Heinrich Schuchardt <address@hidden> wrote:

GLPK is C software. C# is a different programming language. You cannot compile C as C#. You need a C compiler.

But you can call a C language DLL from C#.

Best regards

Heinrich Schuchardt

http://www.xypron.de

Am 16.09.15 um 14:10 schrieb usa usa

> Hi, Heinrich, thanks.
>
>
>
> The link https://en.m.wikibooks.org/wiki/GLPK/Windows is about building
>
> GLPK by Visual C++.
>
>
>
> I would like to build it by Visual C#.
>
>
>
> Any help would be appreciated.
>
>
>
> thanks
>
>
>
>
>
> On Wed, Sep 16, 2015 at 1:00 AM, Heinrich Schuchardt <address@hidden>
>
> wrote:
>
>
>
> > See batch files in w32 and w64 directory.
>
> >
>
> > Read https://en.m.wikibooks.org/wiki/GLPK/Windows
>
> >
>
> > Or simply use binaries provided by http://sourceforge.net/projects/winglpk
>
> > /
>
> >
>
> > Best regards
>
> >
>
> > Heinrich Schuchardt
>
> >
>
> >
>
> >
>
> >
>
> > usa usa <address@hidden>schrieb:
>
> >>
>
> >> Hi,
>
> >>
>
> >> I would like to build glpk.dll for C# so that I can call it from VS2013
>
> >> on win7.
>
> >>
>
> >> I downloaded  http://ftp.gnu.org/gnu/glpk/glpk-4.55.tar.gz
>
> >>
>
> >> But, the INSTALL document only talked about how to build and install it
>
> >> on linux.
>
> >>
>
> >> How to build it in VS2013 to get the .dll ?
>
> >>
>
> >> Any help would be appreciated.
>
> >>
>
> >> thanks
>
> >>
>
> >>
>
> >>
>
> >> _______________________________________________ Help-glpk mailing list
>
> >> address@hidden https://lists.gnu.org/mailman/listinfo/help-glpk
>
> >
>
> >