WideCharToMultiByte()在Release下奇怪问题？

[小竹z]

RT.代码如下：

CString strNode;
strNode=m_DeviceTree.GetItemText(hSlectNode); //获取选中节点文本
int len=WideCharToMultiByte(CP_ACP,0,strNode,strNode.GetLength(),NULL,0,NULL,NULL);
char *tempStr=new char[len+1];
memset(tempStr,0,len+1);
WideCharToMultiByte(CP_ACP,0,strNode,strNode.GetLength(),tempStr,len,NULL,NULL);
tempStr[len]='\0';
string _strNode=tempStr;
delete tempStr;

程序实现将从树节点的文本从Unicode转为ANSI版本。在Debug模式下，正确；Release模式下，就出问题，原因在于Len总是返回为0，_strNode就出现随机值，有时为空，有时候为乱码。有哪位大侠帮帮忙？

[qq120848369]

delete []tempStr;

[super_admi]

一般来说，不建议直接使用这个函数，而转为使用宏：A2W和W2A.

[龙哥依旧]

void UnicodeToAnsi( PCWSTR p, string & sz )
{
	int nLen = WideCharToMultiByte( CP_ACP, 0, (wchar_t *)p, -1, NULL, 0, NULL, NULL );
	if ( nLen <= 0 )
	{
		return ;
	}

	char* pResult = new char[nLen];
	nLen = WideCharToMultiByte( CP_ACP, 0, (wchar_t *)p, -1, pResult, nLen, NULL, NULL );

	sz = pResult;
	delete [] pResult;

	return ;
}

void AnsiToUnicode( PCSTR p, wstring & sz )
{
    int nLen = MultiByteToWideChar( CP_ACP, 0, p, -1, NULL, 0 );
    if ( nLen <= 0 )
    {
        return ;
    }

    wchar_t* pResult = new wchar_t[nLen];
    nLen = MultiByteToWideChar( CP_ACP, 0, p, -1, pResult, nLen );

    sz = pResult;
    delete [] pResult;

    return ;
}