[VC.NET]How to Fix "C2039: 'GetCurrentDirectoryA()' : is Not a Member of 'System::IO::Directory'"

看到論壇上有人問到如何處理這樣的問題。看了一下前輩的回應後才發現，原來這樣的問題是由於Windows.h檔案內，已定義了GetCurrentDirectory這個巨集所導致。該巨集會在編譯時把GetCurrentDirectory給改為GetCurrentDirectoryA或是GetCurrentDirectoryW。

#if UNICODE
#define GetCurrentDirectory GetCurrentDirectorryW
#else
#define GetCurrentDirectory GetCurrentDirectorryA
#endif

因此使用類似下面的程式，在編譯時就會發生錯誤。

#include "stdafx.h"
#include <windows.h>
using namespace System;
using namespace System::IO;

int main(array<System::String ^> ^args)
{
	Console::WriteLine(L"Dir: "+System::IO::Directory::GetCurrentDirectory()); // Error!
    return 0;
}

錯誤訊息 $[VC.NET]How to Fix \$

解決辦法可利用#undef去把該巨集給取消。

#undef GetCurrentDirectory

像是

#include "stdafx.h"
#include <windows.h>
using namespace System;
using namespace System::IO;

#undef GetCurrentDirectory

int main(array<System::String ^> ^args)
{
	Console::WriteLine(L"Dir: "+System::IO::Directory::GetCurrentDirectory());
    return 0;
}

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How to Fix – “C2039: ‘GetCurrentDirectoryA()’ : is Not a Member of ‘System::IO::Directory’”

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