我正在尝试使用c++ / cli代码从C#调用非托管函数。

我有与此类似的代码:

MyFileWrapper MyFileWrapper::ReadMyFile(System::String ^fileName)
{
    auto nativeMyFile=MyFile::ReadMyFile((char *)
           System::Runtime::InteropServices::Marshal::StringToHGlobalAnsi(
           fileName).ToPointer());
    MyFileWrapper myFileWrapper=gcnew MyFileWrapper();
     // code will be added to read information from native object and convert them to wrapper properties.
    return myFileWrapper;

}

但我得到的错误
 Error  2   error C2440: 'return' : cannot convert from 'MyFileWrapper' to 'MyFileWrapper'  MyFileWrapper.cpp
 Error  1   error C3673: 'MyFileWrapper' : class does not have a copy-constructor   MyFileWrapper.cpp

对于第一个错误,智能提示给我以下错误,该错误具有更好的解释:
    IntelliSense: no suitable user-defined conversion from "MyFileWrapper ^" to "MyFileWrapper" exists

有什么问题,我该如何解决?

最佳答案

gcnew MyFileWrapper()返回MyFileWrapper^(即对MyFileWrapper实例的托管引用),而不是MyFileWrapper

MyFileWrapper^ MyFileWrapper::ReadMyFile(System::String^ fileName)
{
    ...
    MyFileWrapper^ myFileWrapper = gcnew MyFileWrapper();
    ...
    return myFileWrapper;
}

关于c# - 如何从C++/CLI静态函数返回托管类,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/17167728/

10-12 13:11