【发布时间】：2011-03-25 09:31:28
【问题描述】：
我已经尝试使用 c# 代码更改系统的时区几天了，但我尝试的任何方法都没有多大意义或根本无法正常工作。我开始尝试对 SetTimeZoneInformation 使用 PInvoke 语法，我在此处的其他问题上看到过。
[DllImport("kernel32.dll", CharSet = CharSet.Auto)] private static extern bool
SetTimeZoneInformation([In] ref TimeZoneInformation lpTimeZoneInformation);
我正在研究如何创建 TimeZoneInformation 结构并感到困惑，因为我的系统显然有一个动态 DST 系统。事实证明，自从 Vista 以来，微软添加了一种处理时区的新方法。您现在必须使用 SetDynamicTimeZoneInformation
[DllImport("kernel32.dll", CharSet = CharSet.Auto)]
private static extern bool SetDynamicTimeZoneInformation([In] ref DynamicTimeZoneInformation lpTimeZoneInformation);
我在 msdn 上搜索了有关此 API 的帮助，并找到了一些内容，“应用程序必须具有 SE_TIME_ZONE_NAME 权限才能使此功能成功。”最终，我找到了this 页面，其中包含看起来非常好的代码来完成这项工作。问题是它不起作用。
这是我的非工作代码：
[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;
}
有没有人对此有任何运气...在后 Vista 系统中设置时区？也许有更好的方法。
谢谢
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