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Ich habe versucht, die Zeitzone meines Systems mit C # -Code für ein paar Tage zu ändern, und nichts, was ich versuche, macht viel Sinn oder funktioniert überhaupt. Ich habe versucht, die PInvoke-Syntax für SetTimeZoneInformation zu verwenden, die ich bei anderen Fragen hier gesehen habe.

[DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool
SetTimeZoneInformation([In] ref TimeZoneInformation lpTimeZoneInformation);

Ich habe mir überlegt, wie ich die TimeZoneInformation-Struktur erstellen soll, und war verwirrt, da mein System offensichtlich ein dynamisches DST-System hat. Es stellt sich heraus, dass Microsoft seit Vista eine neue Art der Behandlung von Zeitzonen hinzugefügt hat. Sie müssen jetzt SetDynamicTimeZoneInformation @ verwende

[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);

Ich habe in msdn nach Hilfe für diese API gesucht und Folgendes gefunden: "Eine Anwendung muss über die Berechtigung SE_TIME_ZONE_NAME verfügen, damit diese Funktion erfolgreich ausgeführt werden kann." Schließlich fand ichDie page mit ziemlich gutem Code, um dies zu erreichen. Das Problem ist, dass es einfach nicht funktioniert.

Hier ist mein nicht funktionierender Code:

[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;
}

Hatte jemand Glück damit ... die Zeitzone in einem Post-Vista-System einzustellen? Vielleicht gibt es insgesamt einen besseren Weg.

Vielen Dan