8
He intentado cambiar la zona horaria de mi sistema con el código C# durante unos días y nada de lo que intento tiene mucho sentido o no funciona. Empecé tratando de usar la sintaxis de PInvoke para SetTimeZoneInformation que he visto en otras preguntas aquí.Cómo cambiar la configuración de la zona horaria de Windows2k8 con .net
[DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool
SetTimeZoneInformation([In] ref TimeZoneInformation lpTimeZoneInformation);
que estaba buscando en la forma en que debería crear la estructura TimeZoneInformation y se confundió ya que mi sistema, obviamente, tiene un sistema de dinámica de DST. Resulta que desde Vista Microsoft agregó una nueva forma de manejar Timezones. Ahora tiene que utilizar SetDynamicTimeZoneInformation
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);
Busqué ayuda con esta API en MSDN y encontré algo que dice, "Una aplicación debe tener el privilegio SE_TIME_ZONE_NAME para esta función tenga éxito." Finalmente encontré this página con lo que parece ser un código bastante bueno para hacer esto. El problema es que simplemente no funciona.
Aquí está mi código que no funciona:
[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;
}
Alguien ha tenido un poco de suerte con este ... establecer la zona horaria en un sistema de post Vista? Tal vez hay una mejor manera en conjunto.
Gracias
Esto es impresionante, gracias! – Rory
Me ayudó, gracias. – Vadim
He estado probando varios fragmentos de código de Internet y SO, pero este es el primero en funcionar. ¡GRACIAS! – HenryAdamsJr