DllImport, how to dinamically assing the DLL path?

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Luis Fajardo - 20 Oct 2004 20:51 GMT

I don't want to put the .DLL in a known OS path folder, I'll like to define
or load the .DLL from an specific location at runtime. How should I do it?

Thanks in advance

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James - 20 Oct 2004 21:01 GMT

You can always put the dll in the same folder as your
executable or referencing assembly. I have seen articles
on this around the net but can't find one right now.

>-----Original Message-----
>I don't want to put the .DLL in a known OS path folder, I'll like to define
>or load the .DLL from an specific location at runtime. How should I do it?
>
>Thanks in advance
>.

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Luis Fajardo - 20 Oct 2004 21:09 GMT

James, thanks for your answer. What if the assembly is on the GAC? I'm
dealing with versioning issues, that's why I need to know where to locate the
.DLL. I need to be able to run two versions side by side, that means 2
assemblies on the GAC, and 2 .DLL, each set with different version levels.

Thanks

> You can always put the dll in the same folder as your
> executable or referencing assembly. I have seen articles
[quoted text clipped - 8 lines]
> >Thanks in advance
> >.

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James - 20 Oct 2004 21:27 GMT

To make sure I understand: You'll have 2 .NET assemblies
and two legacy Dlls. You want each .NET assembly to
reference a specific version of the legacy Dll.

If this is the case then the trouble is with the way
Windows loads Dlls - there are no provisions for choosing
which version you want your .NET assemblies to load. My
*guess* is that you may have to avoid using the DllImport
attribute and load them manually. The Win32 API *might*
give you the flexibility to do this, but this is way out
of my league.

>-----Original Message-----
>James, thanks for your answer. What if the assembly is on the GAC? I'm
[quoted text clipped - 18 lines]
>>
>.

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William DePalo [MVP VC++] - 20 Oct 2004 21:11 GMT

>I don't want to put the .DLL in a known OS path folder, I'll like to define
> or load the .DLL from an specific location at runtime. How should I do
> it?

This is just thinking out loud, though, as I have never tried it but ...

On very recent platforms (2K+3, XP/SP1) SetDllDirectory() might come in
handy. I'm not sure if it has a .Net equivalent or if you'd need to use
P/Invoke.

Regards,
Will

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Robert Jordan - 21 Oct 2004 00:24 GMT

Hi Luis,

> I don't want to put the .DLL in a known OS path folder, I'll like to define
> or load the .DLL from an specific location at runtime. How should I do it?

http://www.codeproject.com/csharp/dyninvok.asp

bye
Rob

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DllImport, how to dinamically assing the DLL path?

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