系统:Windows 7 32bit
语言:C++
我试图访问 register HKEY_LOCAL_MACHINE\\HARDWARE\\DEVICEMAP\\Scsi\\Scsi Port 0
, key Driver
(type REG_SZ
) -- 没问题。
从 读取相同HKEY_LOCAL_MACHINE\\HARDWARE\\DEVICEMAP\\SERIALCOMM
,所有键(类型REG_SZ
)都有斜线,例如\Device\Serial0
。
在读取此类键时,它始终返回 2(没有此类文件),并带有以下示例代码:
HKEY hKey = 0;
DWORD dwType = REG_SZ;
char buf[255] = {0};
DWORD dwBufSize = sizeof(buf);
if( RegOpenKeyEx( HKEY_LOCAL_MACHINE, TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"), 0, KEY_QUERY_VALUE, &hKey ) == ERROR_SUCCESS )
{
auto ret = RegQueryValueEx( hKey, TEXT("\Device\Serial0"), 0, &dwType, (LPBYTE)buf, &dwBufSize );
// ret always == 2 for key with slashes
--- CUT ---
读取名称中带有斜杠的键值的正确方法是什么?
以上已由 Cody Gray 正确回答。
下面是另一个问题。
当我使用变量而不是文本字符串时,我遇到了同样的问题。
Iv 考虑了使用单斜杠和双斜杠的两种方法:
HKEY hKey = 0;
DWORD keyType = REG_SZ;
TCHAR buf[255] = {0};
DWORD bufSize = sizeof(buf);
QSettings winReg("HKEY_LOCAL_MACHINE\\HARDWARE\\DEVICEMAP\\SERIALCOMM", QSettings::NativeFormat);
auto comsKey = winReg.allKeys();
FOREACH( auto com, comsKey )
{
// FOREACH - boost macro
// comsKey = QList<QString> (list of key names) [from Qt framework]
// com = QString (single key name) [from Qt framework]
if( RegOpenKeyEx(HKEY_LOCAL_MACHINE, TEXT("HARDWARE\\DEVICEMAP\\SERIALCOMM"), 0, KEY_QUERY_VALUE, &hKey ) == ERROR_SUCCESS )
{
wchar_t* keyw = new wchar_t();
//com.replace("/", "\\\\"); <- checked both variants commented and not commented; com == /Device/Serial0 so im converting to \\Device\\Serial0
int size = com.size();
mbstowcs( keyw, com.toStdString().data(), size );
//auto ret = RegQueryValueEx( hKey, TEXT("\\Device\\Serial0"), 0, &keyType, (LPBYTE)buf, &bufSize ); // <- this works!
auto ret = RegQueryValueExW( hKey, (LPCWSTR)&keyw, 0, &keyType, (LPBYTE)buf, &bufSize ); // <- this one not works!
我已经尝试了所有带有“\Device..”、“/Device”、“\Device”等的变体。