I had a C++ dll that I used for C++ applications. I added a managed C++
class to this library and started to use the managed C++ class in my C#
application.
This works OK only if I build the C++ dll in release mode. If I try to
build the C++ dll in Debug mode, I am unable to add the dll as a
reference to my C# project. I get an error message that:
"This is not a valid assembly or COM component".
It's strange that this same technique works if I build a release
version.
Can anyone explain why this is happening? Could it be related to the
fact that I did not start out the C++ project as a ".Net class
library"?
Thanks,
Mitch
(sorry for the cross post, but when I started reading this group, it
seemed more appropriate.) 7 4002
"MB" <ba*****@yahoo. com> wrote in message
news:11******** *************@z 34g2000cwc.goog legroups.com... I had a C++ dll that I used for C++ applications. I added a managed C++ class to this library and started to use the managed C++ class in my C# application.
This works OK only if I build the C++ dll in release mode. If I try to build the C++ dll in Debug mode, I am unable to add the dll as a reference to my C# project. I get an error message that:
"This is not a valid assembly or COM component".
It's strange that this same technique works if I build a release version.
Can anyone explain why this is happening? Could it be related to the fact that I did not start out the C++ project as a ".Net class library"?
What VS.NET version are you using?
Are you sure you have set the /clr switch for the release and the debug
version?
What does dumpbin /clrheader YourDebugLib.dl l report?
I'm using VS2003, Here are the dumps of the release and debug dlls. The
only diff I see is in the "strongNameSign atureDirectory" . I am using a
strong name for the dll.
I also looked at the diffs in the command line. The debug version has
two extra switches
/GS and /Zc:wchar_t. Thanks for any clues:
Mitch
*** debug version **** this one gives the error
Dump of file C:\VDevTrunk\CO RE\Math\MathLib \Debug\mathlib. dll
File Type: DLL
clr Header:
48 cb
2.00 runtime version
1D388 [ 11018] RVA [size] of MetaData Directory
0 flags
0 entry point token
0 [ 0] RVA [size] of Resources Directory
0 [ 0] RVA [size] of StrongNameSigna ture Directory
0 [ 0] RVA [size] of CodeManagerTabl e Directory
2E3EC [ B70] RVA [size] of VTableFixups Directory
0 [ 0] RVA [size] of ExportAddressTa bleJumps
Directory
Summary
1000 .CRT
6000 .data
1C000 .rdata
1000 .reloc
1000 .rsrc
16000 .text
*** release version **** this one gives the error
Dump of file C:\VDevTrunk\CO RE\Math\MathLib \Release\mathli b.dll
File Type: DLL
clr Header:
48 cb
2.00 runtime version
13FE0 [ 125A0] RVA [size] of MetaData Directory
8 flags
0 entry point token
0 [ 0] RVA [size] of Resources Directory
13F60 [ 80] RVA [size] of StrongNameSigna ture Directory
0 [ 0] RVA [size] of CodeManagerTabl e Directory
26580 [ AF0] RVA [size] of VTableFixups Directory
0 [ 0] RVA [size] of ExportAddressTa bleJumps
Directory
Summary
1000 .CRT
6000 .data
19000 .rdata
1000 .reloc
1000 .rsrc
11000 .text
"MB" <ba*****@yahoo. com> wrote in message
news:11******** **************@ u72g2000cwu.goo glegroups.com.. . I'm using VS2003, Here are the dumps of the release and debug dlls. The only diff I see is in the "strongNameSign atureDirectory" . I am using a strong name for the dll.
That is indeed strange. I have made a test with VS2003, a Win32 project
compiled with /clr and signed with [assembly: AssemblyKeyFile (...)]; and
both, the debug and the release build have a strongNameSigna tureDirectory.
Please inspect both manifests with ILDASM to see if a publickeytoken exists
in both assemblies.
You can also use sn.exe's /Tp option to dump the public key. What does
sn -Tp return for both assemblies?
I also looked at the diffs in the command line. The debug version has two extra switches /GS and /Zc:wchar_t. Thanks for any clues:
Different /GS switches make sense to me, diffenen /Zc switches look like a
mis-setting but that should not be related to your porblem.
Marcus
Checking the manifest using ildasm shows that the debug version is a
..module and not a .assembly. So, where do you tell VS that a dll is a
..Net assembly? And where could this be differentiated based on Debug or
Release?
I really appreciate your help on this. You obviously know what your
doing.
Mitch
According to your explanations, it seems that you have the following debug
setting:
Linker / Advanced / Turn Off Assembly Generation = Yes (/NOASSEMBLY)
and the following release setting:
Linker / Advanced / Turn Off Assembly Generation = No
Set the debug setting to no, too and the problem should be fixed
Marcus Heege
"MB" <ba*****@yahoo. com> wrote in message
news:11******** **************@ i40g2000cwc.goo glegroups.com.. . Checking the manifest using ildasm shows that the debug version is a .module and not a .assembly. So, where do you tell VS that a dll is a .Net assembly? And where could this be differentiated based on Debug or Release?
I really appreciate your help on this. You obviously know what your doing.
Mitch
You're a genius. Thank you very much.
Tell your boss to give you a raise ;-)
Mitch
You're a genius. Thank you very much.
Tell your boss to give you a raise ;-)
Mitch This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Bob Rock |
last post by:
Hello,
in the last few days I've made my first few attempts at creating mixed C++
managed-unmanaged assemblies and looking aftwerwards with ILDASM at what is
visible in those assemblies from a managed point-of-view I've noticed that:
1) for each managed and unmanaged C function (not C++ classes) I get a
public managed static method (defined on a 'Global Functions' class) in the
generated assembly with an export name of the form...
|
by: Adam McKee |
last post by:
We are using Visual Studio.NET 2003 in our project with .NET framework
1.1. One of our libraries is a mixed-mode dll assembly consisting of
one managed C++ library, and several unmanaged C++ libraries. We are
using managed C++ as a bridge between managed .NET code and unmanaged
C++ code, which I'm sure is a fairly common practice. The managed C++
library is compiled with /CLR whereas all other libraries are compiled
without /CLR because...
|
by: Aaron Queenan |
last post by:
When I build a C++ library to .NET using the managed C++ compiler, I get the
following error message:
Linking...
LINK : error LNK2020: unresolved token (0A000005) _CrtDbgReport
LINK : error LNK2020: unresolved token (0A000007) memset
LINK : error LNK2020: unresolved token (0A000008) free
LINK : error LNK2020: unresolved token (0A00000A) atexit
LINK : error LNK2020: unresolved token (0A000028) wcscpy
LINK : error LNK2020: unresolved...
|
by: Gerhard Menzl |
last post by:
When creating a Managed C++ DLL using the Visual Studio 7.1 Solution
Explorer (by selecting Add New Project and then either choosing Class
Library (.NET) or Windows Control Library (.NET)), the IDE sets the
/MT(d) compiler switch (statically linked multithreaded C runtime
library) by default. This is fine with me, as it relieves me from having
to redistribute MSVCR71(D).DLL with my application.
However, as soon as a single runtime...
|
by: adhingra |
last post by:
I stumbled upon something which does not make sense "Debug class methods are
not automatically suppressed by the managed c++ compiler when the project is
build in release mode"
Create a a Project (Windiows Forms or Console) in VS2005 using Managed C++
and put a Debug:;Assert(false) or Debug::Writeline("test") in there and then
compile in Debug and release Configurations. The result is the same in both.
Debug class calls are not...
| |
by: MB |
last post by:
I had a C++ dll that I used for C++ applications. I added a managed C++
class to this library and started to use the managed C++ class in my C#
application.
This works OK only if I build the C++ dll in release mode. If I try to
build the C++ dll in Debug mode, I am unable to add the dll as a
reference to my C# project. I get an error message that:
"This is not a valid assembly or COM component".
|
by: Rob R. Ainscough |
last post by:
I can't seem to locate the appropriate area in VS 2005 where I can
accomplish this -- is this a C# only option?
Thanks, Rob.
|
by: =?Utf-8?B?RVF1QWw=?= |
last post by:
Hi,
We have an application developed in VC2005 with mixed code, primarily C++
but using a C# dll for database access (DBUploader), the dll exposes a C++
interface. We are experiencing intermittent failure on startup - no errors or
warnings are generated (including in the EventVwr). Once running there are no
issues. The process is started either manually or spawned via a Windows
service. The dll is compiled with the following compiler...
|
by: =?Utf-8?B?dmlwZXJ4MTk2Nw==?= |
last post by:
We are having an issue with an application we are developing. We have a
Legacy COM DLL in C++ that we have converted to Visual Studio 2008. This COM
DLL has methods that are calling Managed C# assemblies as pass thru to
support legacy applications in an effort to move our code to the new Code
base. Our COM Object can be instantiated on Windows XP in any COM supported
environment using Visual C++, Visual Basic, ASP.NET or ASP and works...
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
| |
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
| |