利用FindFirstFile和CreateDirectory函数实现多层目录的检测和创建

//检测并创建多层目录

//测试了 strPath = "C:\\Documents and Settings\\aa"，"11\\22\\33\\44"，"11\\22\\33\\44\\"情况。

BOOL MakeDirecory(CString strPath)

{

	//判断是不是以'\'或者'/'结尾,若是则去除

	int nLength = strPath.GetLength();

	while('\\' == strPath.GetAt(nLength-1) || '/' == strPath.GetAt(nLength-1))

	{

		strPath.Delete(nLength-1);		//Delete的返回值是删除前的字符串长度。。

		nLength = strPath.GetLength();

		ASSERT(nLength == strPath.GetLength());

	}



	//如果有'\'全部转换成'/'

	if(-1 != strPath.Find('\\') )

	{

		strPath.Replace("\\","/");

	}



	CString strPathTemp = strPath;



	//找出当前已经存在的目录

	int nIndex = 0;

	while( INVALID_HANDLE_VALUE == FindFirstFile(strPathTemp,NULL) )

	{

		//除去该层目录

		nIndex = strPathTemp.ReverseFind('/');

		

		if(-1 != nIndex)									

		{		

			strPathTemp.Delete(nIndex,nLength-nIndex);

			nLength = strPathTemp.GetLength();



			if( ':' == strPathTemp.GetAt(nIndex-1) )	//已经到达盘符了

				break;

		}

		else			//到达最根层目录了

		{		

			strPathTemp.Empty();

			nLength = 0;

			break;

		}

	}

	ASSERT(nLength == strPathTemp.GetLength() );

	

	//从找到的这个已经存在的目录开始往后创建文件夹

	while(nLength != strPath.GetLength() )

	{

		strPathTemp.Empty();

		nIndex = strPath.Find("/",nLength+1);

		if(-1 == nIndex)		//检查是否已经是最后一个目录了

		{

			strPathTemp = strPath;

			nLength = strPath.GetLength();

		}

		else

		{

			strPathTemp = strPath.Left(nIndex);

			nLength = strPathTemp.GetLength();

		}

		ASSERT(nLength == strPathTemp.GetLength());



		if(!CreateDirectory(strPathTemp,NULL))

		{	

			CString strError = _T("");

			strError.Format(_T("创建目录%s失败。",strPathTemp));

			MessageBox(NULL,strError,_T("错误"),MB_OK | MB_ICONERROR );

			return FALSE;

		}

	}



	return TRUE;

}