8
Próbowałem zmienić strefę czasową mojego systemu z kodu C# od kilku dni i nic staram robi większego sensu czy działa w ogóle. Zacząłem próbować użyć składni PInvoke dla SetTimeZoneInformation, którą widziałem w innych pytaniach tutaj.Jak zmienić ustawienia strefy czasowej z Windows2k8 z .net
[DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool
SetTimeZoneInformation([In] ref TimeZoneInformation lpTimeZoneInformation);
Szukałem w jaki sposób należy utworzyć struct TimeZoneInformation i irytować, ponieważ mój system ma oczywiście dynamiczny system DST. Okazuje się, że odkąd Vista Microsoft dodał nowy sposób obsługi stref czasowych. Teraz trzeba użyć SetDynamicTimeZoneInformation
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);
Szukałam pomocy w tym API na MSDN i znalazłem coś, mówiąc: „Wniosek musi mieć przywilej SE_TIME_ZONE_NAME dla tej funkcji, aby odnieść sukces.” W końcu znalazłem stronę this z czymś, co wydaje się całkiem dobrym kodem, aby to zrobić. Problem polega na tym, że po prostu nie działa.
Oto mój kod zakaz pracy:
[StructLayout(LayoutKind.Sequential)]
public struct LUID
{
public int LowPart;
public int HighPart;
}
[StructLayout(LayoutKind.Sequential)]
public struct TOKEN_PRIVILEGES
{
public LUID Luid;
public UInt32 Attributes;
public UInt32 PrivilegeCount;
}
[StructLayoutAttribute(LayoutKind.Sequential)]
public struct SystemTime
{
public ushort Year;
public ushort Month;
public ushort DayOfWeek;
public ushort Day;
public ushort Hour;
public ushort Minute;
public ushort Second;
public ushort Millisecond;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct DynamicTimeZoneInformation
{
public int bias;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string standardName;
public SystemTime standardDate;
public int standardBias;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)]
public string daylightName;
public SystemTime daylightDate;
public int daylightBias;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
public string timeZoneKeyName;
public bool dynamicDaylightTimeDisabled;
}
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
private static extern int GetDynamicTimeZoneInformation(out DynamicTimeZoneInformation lpTimeZoneInformation);
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int OpenProcessToken(int ProcessHandle, int DesiredAccess, ref int tokenhandle);
[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int GetCurrentProcess();
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int LookupPrivilegeValue(string lpsystemname, string lpname, [MarshalAs(UnmanagedType.Struct)] ref LUID lpLuid);
[DllImport("advapi32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int AdjustTokenPrivileges(int tokenhandle, int disableprivs, [MarshalAs(UnmanagedType.Struct)]ref TOKEN_PRIVILEGES Newstate, int bufferlength, int PreivousState, int Returnlength);
public const int TOKEN_ASSIGN_PRIMARY = 0x00000001;
public const int TOKEN_DUPLICATE = 0x00000002;
public const int TOKEN_IMPERSONATE = 0x00000004;
public const int TOKEN_QUERY = 0x00000008;
public const int TOKEN_QUERY_SOURCE = 0x00000010;
public const int TOKEN_ADJUST_PRIVILEGES = 0x00000020;
public const int TOKEN_ADJUST_GROUPS = 0x00000040;
public const int TOKEN_ADJUST_DEFAULT = 0x00000080;
public const UInt32 SE_PRIVILEGE_ENABLED_BY_DEFAULT = 0x00000001;
public const UInt32 SE_PRIVILEGE_ENABLED = 0x00000002;
public const UInt32 SE_PRIVILEGE_REMOVED = 0x00000004;
public const UInt32 SE_PRIVILEGE_USED_FOR_ACCESS = 0x80000000;
public static bool EnablePrivilege(string privilege)
{
try
{
int token = 0;
int retVal = 0;
TOKEN_PRIVILEGES TP = new TOKEN_PRIVILEGES();
LUID LD = new LUID();
retVal = OpenProcessToken(GetCurrentProcess(),
TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref token);
retVal = LookupPrivilegeValue(null, privilege, ref LD);
TP.PrivilegeCount = 1;
TP.Attributes = SE_PRIVILEGE_ENABLED;
TP.Luid = LD;
retVal = AdjustTokenPrivileges(token, 0, ref TP, 1024, 0, 0);
return true;
}
catch
{
return false;
}
}
public static bool DisablePrivilege(string privilege)
{
try
{
int token = 0;
int retVal = 0;
TOKEN_PRIVILEGES TP = new TOKEN_PRIVILEGES();
LUID LD = new LUID();
retVal = OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, ref token);
retVal = LookupPrivilegeValue(null, privilege, ref LD);
TP.PrivilegeCount = 1;
// TP.Attributes should be none (not set) to disable privilege
TP.Luid = LD;
retVal = AdjustTokenPrivileges(token, 0, ref TP, 1024, 0, 0);
return true;
}
catch
{
return false;
}
}
public bool SetSystemTimeZone(string timeZoneId)
{
//I'm using the TimeZoneInfo class to populate a list in the UI. This code to retrieve the correct timezone is working
TimeZoneInfo newTimeZone = TimeZoneInfo.FindSystemTimeZoneById(timeZoneId);
DynamicTimeZoneInformation dtzi = new DynamicTimeZoneInformation();
dtzi.bias = -(Convert.ToInt32(newTimeZone.BaseUtcOffset.TotalMinutes));
dtzi.standardBias = 0;
//Here's where I start to lose it. I don't know which adjustment rule to use from the GetAdjustmentRules call. I'm just using the last one as that seems to usually be the most recent, but it doesn't always have to be.
dtzi.daylightBias = Convert.ToInt32(newTimeZone.GetAdjustmentRules().Last().DaylightDelta.TotalMinutes);
dtzi.standardName = newTimeZone.StandardName;
dtzi.daylightName = newTimeZone.DaylightName;
//It would be nice if this key name would just look up the timezone from the registry and use its settings
dtzi.timeZoneKeyName = newTimeZone.Id;
//No idea if this is the right way to create the SystemTime object I need here.
SystemTime standardDate = new SystemTime();
standardDate.Year = 0;
standardDate.Hour = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionEnd.TimeOfDay.Hour;
standardDate.Minute = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionEnd.TimeOfDay.Minute;
standardDate.DayOfWeek = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionEnd.DayOfWeek;
standardDate.Month = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionEnd.Month;
standardDate.Day = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionEnd.Week;
dtzi.standardDate = standardDate;
SystemTime daylightDate = new SystemTime();
standardDate.Year = 0;
standardDate.Hour = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionStart.TimeOfDay.Hour;
standardDate.Minute = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionStart.TimeOfDay.Minute;
standardDate.DayOfWeek = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionStart.DayOfWeek;
standardDate.Month = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionStart.Month;
standardDate.Day = (ushort)newTimeZone.GetAdjustmentRules().Last().DaylightTransitionStart.Week;
dtzi.daylightDate = daylightDate;
dtzi.dynamicDaylightTimeDisabled = false;
EnablePrivilege("SeTimeZonePrivilege");
if (!SetDynamicTimeZoneInformation(ref dtzi))
returnVal = false;
DisablePrivilege("SeTimeZonePrivilege");
return returnVal;
}
Czy ktoś miał szczęścia z tym ... Ustawienie strefy czasowej w systemie pocztowym Vista? Być może istnieje lepszy sposób w ogóle.
Dzięki
To niesamowite, dziękuję! – Rory
Pomogło mi, dziękuję. – Vadim
Próbowałem różnych fragmentów kodu z całego Internetu i SO, ale jest to pierwszy do pracy. DZIĘKI! – HenryAdamsJr