I'm using Visual Studio 2010. I've written a dll in C#, managed dll then.
Now for some reason, I need to write a software in C++ (.NET then also managed).
I need to import the C# dll into my C++ .NET code.
I can't figure out to do this, I've made several search but this problem seems to not be covered. For example, in C# I don't have include file, then how my C++ (.NET) projet knows about classes and functions inside the dll?
Thanks,
In Visual Studio, bring up the properties of the C++/CLI project, go to "Common Properties/Framework and References" in the tree at the left, and click the "Add New Reference" button. This will bring up the standard "Add Reference" dialog you can get from a C# project, just select your C# DLL or reference a C# project in the same solution.
You need to add a reference into your project. In Visual Studio, right-click your project, then select "References".
You add reference to you assembly, Set ComVisible attribute to your assembly
Edit your AssemblyInfo.cs
[assembly: ComVisible(true)]
.Net Framework have MSIL langage in order to manage interoperability betwwen different langages
Link : http://support.microsoft.com/kb/828736
You just need to add only reference of that dll in your project, as George has replied.
then use that namespace or name of classes in your code...
It is possible. Google search would gave you answers. Few links from Stackoverflow
How to use c# Dll in vc++?
using c# dll in project c++
and you get many more links https://www.google.co.in/#sclient=psy-ab&hl=en&site=&source=hp&q=using+c%23+dll+in+vc%2B%2B&oq=using+C%23+dll+&gs_l=hp.3.2.0l4.1601.6409.0.9065.18.13.2.3.3.2.468.2716.0j9j1j2j1.13.0...0.0...1c.1.ixoWIPWicqo&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=64f4e49ac7d1c408&biw=936&bih=595
Hope this helps
Related
I am a newbie programmer in C#.
Since there is one DLL which is programmed and complied by PowerBuilder and there is no source code left, I am trying to import this DLL file into C# for my owned interest.
The first thing that I have "Add Reference" thru the solution explorer.
However, I have googled a lot but there is a lot of supporting community for teaching to use C# DLL into PowerBuilder. I just have the API Specification when using this PowerBuilder DLL in PowerBuilder only.
So far I have no ideas to work on this. Any fruitful reply that I can be advised?
Thanks!
Assuming it is a .net assembly, with a suitable license, and without dependencies on powerbuilder, it should be fairly simple to just import the dll by using "add Reference" and "Browse". To view the available classes you can double click on the reference to open it in the assembly explorer. Just listing available classes is a poor substitute for proper documentation, but better than nothing.
If these assumptions are wrong you can still use a decompiler like dotPeek to view a decompiled version of the source. Note that some licenses might not permit decompiling.
How do I reference a DLL in a C# script? I'm not using Visual Studio, I'm just using NPP with a C# plugin to write a quick one file script. That script needs to reference a third party DLL. Is there a code snippet that I can include to accomplish this?
The DLL I want to reference is for iTextSharp
Now we know the plugin you're using, it's easy. Just read the documentation on "Using .NET assemblies". In particular, it sounds like you want:
//css_reference iTextSharp.dll;
That's assuming the library is one of the locations CSScript can find automatically - read the linked documentation for more information and options.
You can load the assembly dynamically from a file
Assembly.LoadFrom("iTextSharp.dll");
This is with Visual Studio 2010, SP1. I have a C++ class in a separate C++ project that I want to access and use in C# from another project (both living under the same solution). I have referenced my C++ project from C#. I build my C++ project using the /clr option. I have built a Managed version of the C++ class that calls the corresponding native C++ class.
When I right-click on my C++ project reference from my "References" of my C# project, and click "View in Object Browser", my C++ project exists as part of the list of objects, and I can open it and see my class, namespace, etc. that I am trying to use.
However, from C# code, when I try to do "using " it's not part of the autocomplete list of namespaces, and in fact it gives a compilation error if I type the C++ namespace. "Error 1 The type or namespace name 'MyCppClass' could not be found (are you missing a using directive or an assembly reference?)"
And the answer to that question is no, I'm not missing a using directive or assembly reference, as explained above. Additionally, my C++ classes don't exist in the default namespace, they simply don't exist in my C# project's universe.
So... what am I doing wrong?
This may be too late, but I just had this same issue as you and came back to see if you got an answer.
Eventually I figured out that you need to actually add your COM class as a reference to your .net project along with the .net wrapper class.
I created a c++ COM dll and used the tlbimp to generate a .net wrapper. I then added the wrapper to my project, and went to add references under the COM tab it had my COM assembly there, so I added that too and my project compiled and worked fine.
I am kind of new to C#. I built a class library in order to create a DLL which I need to reference from a VB.Net application.
I followed all the steps detailed in this this article in order to generate the COM assembly based on my C# class library.
All the process ran smoothly (create the key, run gacutil.exe to add the assembly to the cache), but I still can't see the DLL from my main project in order to add it as a reference.
What am I doing wrong? Any help will be appreciated
There's some pretty bad advice in that article, the GAC is a deployment detail and has no relevance to the task of writing and using an assembly on your dev machine. The entire process also has nothing to do with COM at all.
Get ahead by opening your VB.NET solution in Visual Studio. Right-click the solution in the Solution Explorer window, Add, New Project. Pick "Class Library" from the C# node. Now right-click your VB.NET project, Add Reference, Project tab and select your C# project. Any of the public C# classes you write are now available in your VB.NET code.
You might not see the solution if it contains only one VB.NET project. Fix with Tools + Options, Project and Solutions, General, tick "Always show solution".
I have a DLL that I've been using with no problem in Visual C# (simply adding the reference and using the namespace). Now I'm trying to learn C++, and I don't understand how you reference a namespace from a DLL. I can right-click on a project and select 'references' and from there click 'add new reference', but that just provides me with an empty 'projects' window. What am I missing?
C++ is a lot different from C#/VB.Net when it comes to processing DLL references. In C# all that is needed to do a reference is a DLL because it contains metadata describing the structures that lay inside. The compiler can read this information such that they can be used from another project.
C++ does not have the concept of metadata in the DLL in the sense that C# does. Instead you must explicitly provide the metadata in the form of a header file. These files are included in your C++ project and then the DLL is delay loaded at runtime. You don't actually "add a reference" so to speak in C++ but include a header file instead.
Once the header file is included, you can then access the namespace by including it in your CPP files
using namespace SomeNamespace;
First of all, if you are trying to use the same DLL you used in your C# application, if you are using pure native C++, it is not straightforward to make calls into that DLL. The problem is the DLL you are referencing in C# relies on the .NET framework in order to execute (it is a "Managed" DLL, as all C#, VB.NET and C++/CLI assemblies are). There is an easy way to reference "managed" code from C++ and that is by making a managed C++ project (AKA C++/CLI) (choosing from "CLR" section in the C++ project wizard in Visual Studio). Otherwise the only way to access the managed DLL is by exposing it to COM and using COM to access the object.
EDIT: The previous answer will be more helpful if you're using unmanaged c++; I assumed because of the C# reference that you were targeting managed C++.
The 'Add Reference' dialog should have a series of tabs - 'Projects' lists projects in the current solution; .NET lists the libraries installed in the GAC and 'Browse' lets you find a DLL yourself.
If you just want to add a reference to the DLL you should be able to do it with 'Browse'. If it's the output of a project you have the source to, add the project to the solution and it'll appear under the 'Projects' tab.
If this doesn't help, which version of Visual Studio are you using, and where/what is the DLL you want to use?