/// <summary>
/// 设置本地时区
/// </summary>
/// <param name="timeZoneName_en"></param>
/// <returns></returns>
public static bool SetLocalTimeZone(string timeZoneName_en)
{
if (PrivilegeAPI.GrantPrivilege(PrivilegeConstants.SE_TIME_ZONE_NAME))
{
DynamicTimeZoneInformation dtzi = timeZoneName2DynamicTimeZoneInformation(timeZoneName_en);
bool success = false;
// 检测当前系统是否为旧系统
if (IsOldOsVersion())
{
Console.WriteLine("检测当前系统为: Old OS Version");
TimeZoneInformation tzi = DynamicTimeZoneInformation2TimeZoneInformation(dtzi);
success = SetTimeZoneInformation(ref tzi);
}
else
{
success = SetDynamicTimeZoneInformation(ref dtzi);
}
if (success)
{
TimeZoneInfo.ClearCachedData(); // 清除缓存
}
if (!PrivilegeAPI.RevokePrivilege(PrivilegeConstants.SE_TIME_ZONE_NAME))
{
Console.WriteLine("撤权失败: 更改时区");
}
return(success);
}
Console.WriteLine("授权失败: 更改时区");
return(false);
}
public TimeZoneInformation(DynamicTimeZoneInformation DynamicTimeZoneInformation)
{
Bias = DynamicTimeZoneInformation.Bias;
StandardName = DynamicTimeZoneInformation.StandardName;
StandardDate = DynamicTimeZoneInformation.StandardDate;
StandardBias = DynamicTimeZoneInformation.StandardBias;
DaylightName = DynamicTimeZoneInformation.DaylightName;
DaylightDate = DynamicTimeZoneInformation.DaylightDate;
DaylightBias = DynamicTimeZoneInformation.DaylightBias;
}
// 根据时区名获取对应的DynamicTimeZoneInformation
private static DynamicTimeZoneInformation timeZoneName2DynamicTimeZoneInformation(string timeZoneName)
{
TimeZoneInfo timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById(timeZoneName);
DynamicTimeZoneInformation dtzi = new DynamicTimeZoneInformation();
dtzi.standardName = timeZoneInfo.StandardName;
dtzi.standardDate = new SystemTime();
dtzi.daylightName = timeZoneInfo.DaylightName;
dtzi.daylightDate = new SystemTime();
dtzi.timeZoneKeyName = timeZoneInfo.Id;
dtzi.dynamicDaylightTimeDisabled = false;
dtzi.bias = -Convert.ToInt32(timeZoneInfo.BaseUtcOffset.TotalMinutes);
return(dtzi);
}
/// <summary>
/// 获取本地时区
/// </summary>
/// <returns></returns>
public static string GetLocalTimeZone()
{
// 检测当前系统是否为旧系统
if (IsOldOsVersion())
{
TimeZoneInformation tzi = new TimeZoneInformation();
GetTimeZoneInformation(ref tzi);
return(TimeZoneInfo2CustomString(tzi));
}
DynamicTimeZoneInformation dtzi = new DynamicTimeZoneInformation();
GetDynamicTimeZoneInformation(ref dtzi);
return(DynamicTimeZoneInfo2CustomString(dtzi));
}
internal static DateTime GetTimeZoneTime(string TimeZone)
{
try
{
SystemTime SystemTimeLocal;
TimeZoneInformation TimeZoneInformation;
SystemTime SystemTimeNow = new SystemTime(DateTime.UtcNow);
DynamicTimeZoneInformation DynamicTimeZoneInformation = AllEnumerateSystemTimeZones.First(x => x.TimeZoneKeyName == TimeZone);
if (GetTimeZoneInformationForYear(SystemTimeNow.Year, ref DynamicTimeZoneInformation, out TimeZoneInformation))
{
if (SystemTimeToTzSpecificLocalTime(ref TimeZoneInformation, ref SystemTimeNow, out SystemTimeLocal))
{
return(new DateTime(SystemTimeLocal.Year, SystemTimeLocal.Month, SystemTimeLocal.Day, SystemTimeLocal.Hour, SystemTimeLocal.Minute, 0, 0, DateTimeKind.Utc));
}
}
}
catch { }
return(new DateTime());
}
protected override void _Set()
{
WindowsTokenPrivileges.EnableSetTimeZonePrivileges();
var info = new DynamicTimeZoneInformation();
int index = 0;
while (true)
{
if (EnumDynamicTimeZoneInformation(index, out info) != 0) break;
if (info.StandardName == _timeZone.StandardName) break;
index++;
}
if (info.StandardName.Length > 0)
SetDynamicTimeZoneInformation(ref info);
else
throw new Exception("Time Zone not found");
}
private static extern bool SetDynamicTimeZoneInformation(ref DynamicTimeZoneInformation lpDynamicTimeZoneInformation);
// 将DynamicTimeZoneInformation转换为TimeZoneInformation
private static TimeZoneInformation DynamicTimeZoneInformation2TimeZoneInformation(DynamicTimeZoneInformation dtzi)
{
return(new TimeZoneInformation
{
bias = dtzi.bias,
standardName = dtzi.standardName,
standardDate = dtzi.standardDate,
standardBias = dtzi.standardBias,
daylightName = dtzi.daylightName,
daylightDate = dtzi.daylightDate,
daylightBias = dtzi.daylightBias
});
}
// 将DynamicTimeZoneInformation转换为自定义string
private static string DynamicTimeZoneInfo2CustomString(DynamicTimeZoneInformation dtzi)
{
return(dtzi.standardName + "(" + dtzi.bias + ")");
}
private static extern bool GetDynamicTimeZoneInformation(out DynamicTimeZoneInformation lpTimeZoneInformation);
internal static extern int EnumDynamicTimeZoneInformation([In] int dwIndex, out DynamicTimeZoneInformation lpTimeZoneInformation);
static extern bool GetTimeZoneInformationForYear(short wYear, ref DynamicTimeZoneInformation pdtzi, out TimeZoneInformation ptzi);
static extern int EnumDynamicTimeZoneInformation(int dwIndex, out DynamicTimeZoneInformation lpTimeZoneInformation);
