c++-cli | 易学教程

Access Violation Exception/Crash from C++ callback to C# function

阅读更多关于 Access Violation Exception/Crash from C++ callback to C# function

So I have a native 3rd party C++ code base I am working with (.lib and .hpp files) that I used to build a wrapper in C++/CLI for eventual use in C#. I've run into a particular problem when switching from Debug to Release mode, in that I get an Access Violation Exception when a callback's code returns. The code from the original hpp files for callback function format: typedef int (*CallbackFunction) (void *inst, const void *data); Code from the C++/CLI Wrapper for callback function format: (I'll explain why I declared two in a moment) public delegate int ManagedCallbackFunction (IntPtr oInst,

C++/CLI: Use LoadLibrary + GetProcAddress with an exe

阅读更多关于 C++/CLI: Use LoadLibrary + GetProcAddress with an exe

问题 Up until now, I had some sort of plugin mechanism in which I loaded dlls using LoadLibrary and GetProcAddress to create a concrete object and return a common interface. This worked fine until I decided that one of the dlls should be an exe. LoadLibrary's documentation says that it can be used for exe's as well, so I gave it a shot. The exe gets loaded without errors, as GetProcAddress. But when I try to call my concrete object's constructor, I get an access violation. I thought this would

Getting error C3352 (specified function doesn't match delegate type), even though function seems to match delegate type

阅读更多关于 Getting error C3352 (specified function doesn't match delegate type), even though function seems to match delegate type

Here is the exact error message on compilation: error C3352: 'double MyNamespace::MyRefClass::MyFunction(const std::vector<_Ty> &,std::vector<_Ty> &,void *)' : the specified function does not match the delegate type 'double (const std::vector<_Ty> &,std::vector<_Ty> &,void *)' MyFunction is a private function in the reference class MyRefClass The quoted error shows up when I try to create an instance of the private delegate MyDelegate , declared in the same reference class, with the code: MyDelegate^ del = gcnew MyDelegate(&MyRefClass::MyFunction); As far as I can tell, the signatures of the

C++/CLI: Catching all (.NET/Win32/CRT) exceptions

阅读更多关于 C++/CLI: Catching all (.NET/Win32/CRT) exceptions

I know this is frowned upon, but I'm out of options here. I'm developing a C++/CLI app that has a bug that I'm unable to track down - mainly because it's bypassing my current crash handler: AppDomain::CurrentDomain->UnhandledException += gcnew UnhandledExceptionEventHandler(&LogAndExit); Application::ThreadException += gcnew ThreadExceptionEventHandler(&LogAndExit); Application::SetUnhandledExceptionMode(UnhandledExceptionMode::CatchException); try { Application::Run(gcnew frmMain()); } catch (Exception^ ex) { LogAndExit(ex); } catch (...) { LogAndExit(); } Standard .NET crash handling, I

Remote debugging an app with the DEBUG versions of the CRT when VS is not installed on the remote machine

阅读更多关于 Remote debugging an app with the DEBUG versions of the CRT when VS is not installed on the remote machine

问题 First let me say that I can remote debug a release build on the remote computer. I set up my release build much like my debug build but I mostly had to make sure the Debug flag was not set. I've dealt with doing this for a while and finally decided to try and figure out why I had to go through this. I should also mention that my remote debugging experience is limited to this project and the C# program uses a C++/CLI (built with /clr) .DLL to mediate to some critical C++ libs. I don't need to

Why does printf work with managed Strings?

阅读更多关于 Why does printf work with managed Strings?

问题 we are currently digging through some really old C++/CLI-Code (Old Syntax .NET Beta) and were a bit surprised to see something like this: System::String ^source("Test-String"); printf("%s", source); The program correctly outputs Test-String We are wondering, why is it possible to pass the managed string source to printf - and more importantly: Why does it work ? I don't expect it to be some convenience-feature by the compiler because the following doesn't work: System::String ^source("Test

What is CLI/C++ exactly? How does it differ from 'normal' c++?

阅读更多关于 What is CLI/C++ exactly? How does it differ from 'normal' c++?

Let me clarify what I mean by 'normal' C++ first- I'm currently reading Walter Savitch's "Problem Solving in C++". As far as I am aware this is not written specifically for Microsoft or Unix. So my question is, how does what I am learning in this book (which I am using for my universal knowledge-gaining of c++) differ from what I keep reading about CLI C++? Is CLI C++ just what I would encounter if I used Visual C++? I'm totally confused. C++/CLI, (Also sometimes C++/CLR) refers to a language which is positioned somewhere in between native C++, and the .NET framework. It's usually used for

How to add shared C# NuGet dependencies to a C++/Cli project?

阅读更多关于 How to add shared C# NuGet dependencies to a C++/Cli project?

Context: A Visual Studio solution with 2 assemblies, Cs and Cpp. Cs is a C# / .net45 dll Cpp is a C++/Cli dll, a C++ dll compiled with /clr. I have some dependencies that are pure C# projects from nuget.org. I use the original packages provided by the authors. Adding them to the Cs project works fine, but not to Cpp. How can I add the C# package to the C++ project? Since it's C++/Cli, I can easily use .net objects, and I use e.g. in the C++ library stuff from the C# library. But somehow nuget only allows me to select C# projects to add a C# dependency to, not C++ /clr ones. In your C++/CLI

How do you set the version of a C++/CLI project in Visual Studio?

阅读更多关于 How do you set the version of a C++/CLI project in Visual Studio?

I am working with a C++/CLI Project that wraps a C++ Native Library in Visual Studio 2012. My C++/CLI Project has an AssemblyInfo.cpp. I set all the fields there, which include an "AssemblyVersionAttribute". However when I built my project and check its properties in the Windows Explorer, the version information is empty. This is my first C++/CLI project, I have been going over all the options in the project properties but I couldn't find any that works for setting the version. How do you set the version for a C++/CLI Project? Update I will add the content of my AssemblyInfo.cpp. I just filled

How do I detect the user's locale to get the correct csv separator?

阅读更多关于 How do I detect the user's locale to get the correct csv separator?

问题 I have a simple data conversion tool and one of the outputs it can produce is a csv file. This works perfectly here in the UK but when I shipped it out to a German customer I had some issues. Specifally, they use a ' , ' to represent the decimal point in a floating point number and vice versa. This means that when they open their data file in excel, the result is rather messy to say the least :-) Substituting the correct character is trivial, but how can I detect whether or not to apply this?