非托管var作为托管类c ++的成员 [英] unmanaged var as member of managed class c++

问题描述

我是新手在.net c + +，并尝试创建类看起来像：

I'm novice in .net c++ and trying to create class looking like:

public ref class Klient
{
public:
    Klient(){}
    // zmienne
    static DWORD klienty[41][2];
    static int i = 1;
    static DWORD* pid;
    static HANDLE* handle;

    //funkcje
};

但MSV说：

error C4368: cannot define 'klienty' as a member of managed 'Klient': mixed types are not supported

此代码有什么问题？

推荐答案

您可以将.NET基本数据类型作为成员你的托管类（static int i），或指向非托管的任何指针（DWORD * pid，HANDLE * handle），但是你不允许直接有一个非托管对象，整数数组作为一个非托管对象目的。

You can have .NET basic data types as members of your managed class (static int i), or pointers to anything unmanaged (DWORD* pid, HANDLE* handle), but you're not allowed to have an unmanaged object directly, and the array of integers counts as an unmanaged object for this purpose.

由于这里唯一提供问题的是非托管数组，因此可以将其切换到托管数组。

Since the only item giving you a problem here is the unmanaged array, you could switch it to a managed array.

public ref class Klient
{
public:
    Klient(){}
    // zmienne
    static array<DWORD,2>^ klienty = gcnew array<DWORD,2>(41,2);
    static int i = 1;
    static DWORD* pid;
    static HANDLE* handle;

    //funkcje
};

或者，你可以声明一个非托管类，在那里放任何你需要的，到它从托管类。 （如果你在非静态上下文中这样做，不要忘记从你的终结器中删除非托管内存。）

Or, you can declare a unmanaged class, put whatever you need to in there, and have a pointer to it from the managed class. (If you do this in a non-static context, don't forget to delete the unmanaged memory from your finalizer.)

public class HolderOfUnmanagedStuff
{
public:
    DWORD klienty[41][2];
    int i;
    DWORD* pid;
    HANDLE* handle;

    HolderOfUnmanagedStuff()
    {
        i = 1;
    }
};

public ref class Klient
{
public:
    Klient(){}
    // zmienne
    static HolderOfUnmanagedStuff* unmanagedStuff = new HolderOfUnmanagedStuff();

    //funkcje
};

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