Referencing the exiv2 dlls
Added by K P almost 12 years ago
I complied the VC++ project in Visual Studio 2008. Built the project in Release DLL.
I am trying to add a reference to these dlls to my project which is in C# VS 2008.
It gives me an error when I am trying to add a reference, error saying "A reference to C:\....\exiv2.dll could not be added. Please make sure that the file is accessible, and that it is a valid assembly or COM component."
I tried to register the dll but that gives another error saying
"exiv2.dll was loaded, but the DllRegister Server entry point was not found.
This file can not be registered."
Anything I am missing?
Thanks
Replies (4)
RE: Referencing the exiv2 dlls - Added by Andreas Huggel almost 12 years ago
The Exiv2 DLL should behave just like any other DLL.
I'm not sure if you can use it with a C# program just like that, though.
Have you tried with exivsimple.dll? That one is meant to be used from C#.
Maybe someone with more Windows knowhow can give a more useful answer.
Andreas
RE: Referencing the exiv2 dlls - Added by K P almost 12 years ago
I tried ExivSimple.dll too. But looks like I have to use DLLImport to import the exivsimple.dll and have the functions as entry points.
I want to read metadata and store additional metadata. So what functions should I call from C# ? Should I be able to use ImageData method in exivsimple.cpp ?
What is HIMAGE ? Can I send the param as a normal Image from C# ? Would it possible to send the memory stream instead of sending the image ?
Thanks
RE: Referencing the exiv2 dlls - Added by Andreas Huggel almost 12 years ago
Attached is a very simple example and in the old Exiv2 Yahoo! group, you'll find more discussions about the topic. I'm afraid that's really all I can do for you.
There are two other .NET wrappers for Exiv2 that I'm aware of:
exiv2net
http://code.google.com/p/exiv2net/
exiv2-sharp
http://www.ohloh.net/p/exiv2-sharp
http://anonsvn.mono-project.com/viewvc/trunk/exiv2-sharp/
Andreas
| MetaData.cs (8.97 KB) MetaData.cs | Exiv2 C# example (requires exivsimple.dll) |
RE: Referencing the exiv2 dlls - Added by Robin Mills almost 12 years ago
Apologies, guys. I've been asleep on the job and didn't see this one.
I think you're trying to use the exiv2 DLLs as a .Net component (managed code assembly or whatever it's called). It's a regular (unmanaged code) DLL. The DLL is not a COM object and therefore cannot be registered with regsrv32.exe
I've never worked in C#, so I don't know how you call unmanaged code. However I did build and execute the exiv2net C# wrapper created by Andreas Grimme (not to be confused with the Amazing Andreas Huggel). I believe it called exiv2.dll. So it is possible using exiv2net (which is written in C++) to bridge from C# into exiv2.dll
So I think your choices are:
1) Go get exiv2net and you might be happy very quickly
2) Find out about calling unmanaged C++ from C#
3) If you're still stuck, let me know and I'll investigate. I'm rather busy at the moment. If you could give me an idea of your urgency, that would help me prioritize your request with other commitments.
Robin