c++-cli

问题 I'm working on an application in Visual Studio 2010 and I'm coding in C++/CLI. In my previous questions I had issue with data series from a serial port. Now it seems ok and now I'm trying to plot them. I don't want to use Chart , so I would like to use handmade functions that use the class Graphics . In order to test my code, I created two arrays: the first one is filled with values coming from a Gaussian. The second one is filled with random numbers. When I plot the values, I would like to

问题 Hi I want to call functions from a C dll to C++/CLI. The C functions are declared extern. I followed this tutorial for linking the dll: http://social.msdn.microsoft.com/Forums/en/Vsexpressvc/thread/84deabaa-ae82-47cc-aac0-592f5a8dfa22 and then in my C++/CLI dll I have the following: // testWrapper.h #pragma once using namespace System; namespace testWrapper { extern "C" int GtoCalcImpliedVolatility2( double premium, int optionType, double underPrice, double strike, double yearsToExpiry,

问题 I have C++ CLR project with both managed and unmanaged code. In this project I loop through list of cryptoproviders and search for suitable. So I use functions CryptEnumProvidersA CryptAcquireContextA I have C# project which uses C++ project. When I call the method to loop through list of cryptoproviders twice, my application crashes. And it crashes on CryptAcquireContextA. And only on "Aloaha Cryptographic Provider". When i use debug mode, it also crashes. But when i use debug mode, set

问题 I am trying to pass a delegate with managed parameters to native code to be invoked. My code below runs ok, but the string output is garbage. Native Class Header #pragma once typedef void (* SegmentCreatedDelegate)(char** arg); public class SampleClass { public: SampleClass(void); ~SampleClass(void); void DoWork(SegmentCreatedDelegate callback); }; Code SampleClass::SampleClass(void) { } SampleClass::~SampleClass(void) { } void SampleClass::DoWork(SegmentCreatedDelegate callback) { for(int x

问题 In my DirectShow project I create a filter (derived from CBaseVideoRenderer ) to render to a block of memory. This works in most cases perfectly well, with me adding the filter mGraphBuilder->AddFilter(pInterfaceInfo, MemoryRendererName); and relying on GraphBuilder to do the rest. However in some cases the graph builder and my filter cannot agree on a common format and it creates a new ActiveMovie window, bypassing my filter. I would like to detect when this occurs so that I know my filter

问题 I am using visual studio 2010. I have two windows form that calls each other. Form1 has include Form2 i read that i can not include Form1 in Form2 again. but instead use ref class Form1. but i am getting the following error c:\users\seuntech\documents\visual studio 2010\projects\spl_project\spl_project\Form2.h(85): error C2512: 'spl_project::Form1' : no appropriate default constructor available 1>c:\users\seuntech\documents\visual studio 2010\projects\spl_project\spl_project\Form2.h(86):

问题 I have wrriten a managed code for SMO application.How can i comiled it using .NETFRAMEWORK2.0. i dont wnat to use visulastudio due to certain limitataions. how can i do this. can nay body help me in this regard. msbuild.exe TestMsBuild.sln /:t Rebuild /:p configuration=release gives error as TestMsBuild.sln : Solution file error MSB4054: The solution file must be opened in the Visual Studio IDE and converted to the latest version before it can be bu ilt by MSBuild. even though my project is

问题 I am trying to create a CLI value class c_Location with overloaded operators, but I think I have an issue with boxing. I have implemented the operator overloading as seen in many manuals, so I'm sure this must be right. This is my code: value class c_Location { public: double x, y, z; c_Location (double i_x, double i_y, double i_z) : x(i_x), y(i_y), z(i_z) {} c_Location& operator+= (const c_Location& i_locValue) { x += i_locValue.x; y += i_locValue.y; z += i_locValue.z; return *this; } c

问题 I just created a new function in my c++ project using an example with Bitmap lock bits: void GetFrameData(Bitmap ^b) { typedef System::Drawing::Rectangle R; R rect = R(0,0,b->Width,b->Height); System::Drawing::Imaging::BitmapData^ bmpData = b->LockBits( rect, System::Drawing::Imaging::ImageLockMode::ReadWrite, b->PixelFormat ); // Get the address of the first line. IntPtr ptr = bmpData->Scan0; // Declare an array to hold the bytes of the bitmap. // This code is specific to a bitmap with 24

问题 How to use ternary operator with System::Boolean? This sample code always returns true: bool Test(Boolean^ value) { return value ? true : false; } 回答1: Your usage of System::Boolean is wrong in the first place and it has nothing to do with ternary operator. Never pass a value types as reference. Regadless of unnecessary penalities, the code in your answer will work but not in C#. The compiler will complain when you want to call bool Test(Boolean^ value) function. Because there is no concept