SetTimeZoneInfo unable to read the timezone name for the next time

? Offline

Hi All

I have used SetTimeZoneInfo to change time zone of my system.

The date and time is changed according to the timezone i have chosen.

But , in the Timezone settings dialog box, it says "Your current time zone is not recognized. Please select a valid time zone."

Because of this , i'm not able to read the system time zone for the next time.

I tried changing in the registry too. even then i'm facing the same problem.

The registry path i used is : "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\TimeZoneInformation"

and "HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\TimeZoneInformation"*
*
My code is here*
@
QString RegKey = "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones";
QSettings settings(RegKey, QSettings::NativeFormat);
QStringList childKeys = settings.childGroups();
int i = 0;
QString strStdName;
for (QStringList::iterator it = childKeys.begin();it != childKeys.end(); ++it)
{
QString strtimeZone = RegKey + "\" + *it;
QSettings settings1(strtimeZone, QSettings::NativeFormat);
QString str = settings1.value("Display",0).toString();
strStdName = settings1.value("Std",0).toString();
if(str == strDisplayName)
{
QString RegKey1 = "SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones";
QString newRegKey = RegKey1 + "\" + strStdName;
LPCWSTR lpString = newRegKey.utf16();
if( RegOpenKey(HKEY_LOCAL_MACHINE,lpString,&hk) == ERROR_SUCCESS)
{
dwType = REG_SZ;

            if( RegQueryValueEx(hk,L"TZI",0, &dwType, (BYTE *) &binary_data, &size) == ERROR_SUCCESS)
            {
                tz.Bias = binary_data.Bias;
                tz.DaylightBias = binary_data.DaylightBias;
                tz.DaylightDate = binary_data.DaylightDate;
                tz.StandardBias = binary_data.StandardBias;
                tz.StandardDate = binary_data.StandardDate;
                QSettings settingsTimeZone(newRegKey, QSettings::NativeFormat);
                 muiStd = settingsTimeZone.value("MUI_Std").toString();
                 muiDlt= settingsTimeZone.value("MUI_Dlt",0).toString();
                 muiDisplay= settingsTimeZone.value("MUI_Display",0).toString();
            }
            break;
        }

     }
 }
RegCloseKey(hk);


bStatus =  SetTimeZoneInformation(&tz);
if( !SetTimeZoneInformation( &tz ) )
{
    qDebug("STZI failed (%s)\n", GetLastError());
    return 0;
}

QSettings settingsTimeZoneCurrent("HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Control\\TimeZoneInformation" , QSettings::NativeFormat);        
QSettings settingsTimeZoneCurrent001("HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\TimeZoneInformation" , QSettings::NativeFormat);        

settingsTimeZoneCurrent.setValue("TimeZoneKeyName",strStdName);
settingsTimeZoneCurrent.setValue("StandardName",muiStd);
settingsTimeZoneCurrent.setValue("DaylightName",muiDlt);
settingsTimeZoneCurrent001.setValue("TimeZoneKeyName",strStdName);
settingsTimeZoneCurrent001.setValue("StandardName",muiStd);
settingsTimeZoneCurrent001.setValue("DaylightName",muiDlt);

if(bStatus == false)
{
    DWORD dwErrorCode = GetLastError();
    return false;
}

// Disable the privilege

tkp.Privileges[0].Attributes = 0;
AdjustTokenPrivileges(hToken, FALSE, &tkp, 0, (PTOKEN_PRIVILEGES) NULL, 0);

@
strDisplayName is the name of the TimeZone which will come from UI.

Can anyone help me in this regard please.

Thanks in advance.

[Please wrap code in @ tags; mlong]

yaseminyilmaz

Hi Vignesh97 and all,

I'm sorry it is a not a answer. I have to implement same thing as you done. Could you please say how I can use SetTimeZoneInformation within a Qt application (created by Qt Creator)? Which lib files should it be included to .Qt's pro file?

? Offline

Use

#include <windows.h>

Hope it will help u.

yaseminyilmaz

It is required to add Advapi32.lib library to .pro file so that the registry functions of Win32 API can be recognised by Qt.

raidsan

It seem that you miss two field data of "tz":
@WCHAR StandardName[32];
WCHAR DaylightName[32]; @

@ bStatus = SetTimeZoneInformation(&tz);
if( !SetTimeZoneInformation( &tz ) )
{
qDebug("STZI failed (%s)\n", GetLastError());
return 0;
}

typedef struct _TIME_ZONE_INFORMATION {
LONG Bias;
WCHAR StandardName[32];
SYSTEMTIME StandardDate;
LONG StandardBias;
WCHAR DaylightName[32];
SYSTEMTIME DaylightDate;
LONG DaylightBias;
} TIME_ZONE_INFORMATION
@