c++-cli

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 I have been experimenting with C++/CLI delegates (as I am trying to make a .NET reference library), and I have been having the following problem. I define a delegate in C++/CLI, and then create an instance of the delegate in C#, and then call the instance of the delegate through unmanaged C++ via a function pointer. This all works as expected. Code to illustrate this (first my C#) using System; namespace TestProgram { class Program { static void Main(string[] args) { Library.Test

问题 Have a moderate size (40-odd function) C API that needs to be called from a C# project. The functions logically break up to form a few classes that will be API presented to the rest of the project. Are there any objective reasons to prefer P/Invoke or C++/CLI for the interoperability underneath that API, in terms of robustness, maintainability, deployment, ...? The issues I could think of that might be, but aren't problematic are: C++/CLI will require an separate assembly, the P/Invoke

问题 This C++ program is created using Visual Studio 2010. It's a group project that has everyone in class stumped. The program initially starts fine and the user can run through the program and add items that are written out to file. the items are read back in and displayed. When the user is done, on the program exiting return 0; it gives me "An unhandled exception of type System.AccessViolationException occurred. Attempted to read or write protected memory. This is often an indication that other

问题 I'm trying to open a file using a string parameter, however I'm getting the following error: error C2664: 'void std::basic_ifstream<_Elem,_Traits>::open(const wchar_t *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'System::String ^' to 'const wchar_t *' How do you convert System::String ^ to const wchar_t * ? 回答1: As Hans points out, simple conversion is necessary. It would look similar to the following: System::String ^str = L"Blah Blah"; pin_ptr<const wchar_t>

问题 I'm trying to open a file using a string parameter, however I'm getting the following error: error C2664: 'void std::basic_ifstream<_Elem,_Traits>::open(const wchar_t *,std::ios_base::openmode,int)' : cannot convert parameter 1 from 'System::String ^' to 'const wchar_t *' How do you convert System::String ^ to const wchar_t * ? 回答1: As Hans points out, simple conversion is necessary. It would look similar to the following: System::String ^str = L"Blah Blah"; pin_ptr<const wchar_t>

问题 Here's my problem. I am trying to get raw input from attached devices. I am using the information on MSDN to figure it out, but it's been very difficult for me to make sense of some of it. I believe I have successfully created a RAWINPUTDEVICE object and registered a device with RegisterRawInputDevices(). Now I am trying to figure out how to use the GetRawInputDeviceList() and GetRawInputDeviceInfo() functions. The big trouble is trying to understand the parameters they take, which includes a

问题 Suppose that my application is composed of 3 components. They are: c++ native library c++ cli managed library, which wraps native library c# gui application. As I understand, any native exception, thrown from a native c++ library will be wrapped with SEHException managed class. I am interested in the next steps, what is recommended to do after the creation of such an exception object. Should I catch all such possible exceptions within the c++ cli managed library then create an appropriate