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我已經編寫了以下代碼,以編程方式在我的機器上設置時區。如果我使用正確的UTC時間(例如新西蘭標準時間),它會正常工作。如果我使用UTC時間負值,例如Mountain Standard Time,則代碼運行時沒有錯誤,但時區設置爲國際日期行西(-12:00)。以編程方式設置時區僅適用於+ UTC時區
我錯過了什麼嗎?
這裏是我使用的代碼:
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct TimeZoneInformation
{
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;
public static TimeZoneInformation FromTimeZoneInfo(TimeZoneInfo timeZoneInfo)
{
var timeZoneInformation = new TimeZoneInformation();
timeZoneInformation.StandardName = timeZoneInfo.StandardName;
timeZoneInformation.DaylightName = timeZoneInfo.DaylightName;
var timeZoneRegistryPath = @"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\" + timeZoneInfo.Id;
var tzi = (byte[])Microsoft.Win32.Registry.GetValue(timeZoneRegistryPath, "TZI", new byte[] {});
if (tzi == null || tzi.Length != 44)
{
throw new ArgumentException("Invalid REG_TZI_FORMAT");
}
timeZoneInformation.Bias = BitConverter.ToInt32(tzi, 0);
timeZoneInformation.StandardBias = BitConverter.ToInt32(tzi, 4);
timeZoneInformation.DaylightBias = BitConverter.ToInt32(tzi, 8);
timeZoneInformation.StandardDate.Year = BitConverter.ToInt16(tzi, 12);
timeZoneInformation.StandardDate.Month = BitConverter.ToInt16(tzi, 14);
timeZoneInformation.StandardDate.DayOfWeek = BitConverter.ToInt16(tzi, 0x10);
timeZoneInformation.StandardDate.Day = BitConverter.ToInt16(tzi, 0x12);
timeZoneInformation.StandardDate.Hour = BitConverter.ToInt16(tzi, 20);
timeZoneInformation.StandardDate.Minute = BitConverter.ToInt16(tzi, 0x16);
timeZoneInformation.StandardDate.Second = BitConverter.ToInt16(tzi, 0x18);
timeZoneInformation.StandardDate.Millisecond = BitConverter.ToInt16(tzi, 0x1a);
timeZoneInformation.DaylightDate.Year = BitConverter.ToInt16(tzi, 0x1c);
timeZoneInformation.DaylightDate.Month = BitConverter.ToInt16(tzi, 30);
timeZoneInformation.DaylightDate.DayOfWeek = BitConverter.ToInt16(tzi, 0x20);
timeZoneInformation.DaylightDate.Day = BitConverter.ToInt16(tzi, 0x22);
timeZoneInformation.DaylightDate.Hour = BitConverter.ToInt16(tzi, 0x24);
timeZoneInformation.DaylightDate.Minute = BitConverter.ToInt16(tzi, 0x26);
timeZoneInformation.DaylightDate.Second = BitConverter.ToInt16(tzi, 40);
timeZoneInformation.DaylightDate.Millisecond = BitConverter.ToInt16(tzi, 0x2a);
return timeZoneInformation;
}
}
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool SetTimeZoneInformation([In] ref TimeZoneInformation timeZoneInformation);
var t = TimeZoneInformation.FromTimeZoneInfo(TimeZoneInfo.FindSystemTimeZoneById("Mountain Standard Time"));
SetTimeZoneInformation(ref t);
哦,該死的 - 我不小心寫了Bias和StandardBias字段,而不是我的代碼中的整數。 CLR中的長整數是64位,混亂了我的結構佈局。看起來我設法回答我自己的問題。 – Nathanael
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