如何将System :: String ^转换为const char *？ [英] How do I convert a System::String^ to const char*?

问题描述

我在C ++ / CLI中开发一个应用程序，并且有一个非托管代码的csv文件写入库，我想从托管部分使用它。所以我的函数看起来像这样：

I'm developing an app in C++/CLI and have a csv file writing library in unmanaged code that I want to use from the managed portion. So my function looks something like this:

bool CSVWriter::Write(const char* stringToWrite);

...但我真的很努力将我闪亮的System :: String ^ 。基本上我是希望通过做一些类似的调用：

...but I'm really struggling to convert my shiny System::String^ into something compatible. Basically I was hoping to call by doing something like:

if( m_myWriter->Write(String::Format("{0}",someValueIWantToSave)) )
{
    // report success
}

推荐答案

using namespace System::Runtime::InteropServices;
const char* str = (const char*) (Marshal::StringToHGlobalAnsi(managedString)).ToPointer();

从 Dev Shed 。

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