private void ShowOffset(DateTime time, TimeZoneInfo timeZone)
{
DateTime convertedTime = time;
TimeSpan offset;
if (time.Kind == DateTimeKind.Local && !timeZone.Equals(TimeZoneInfo.Local))
{
convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Local, timeZone);
}
else if (time.Kind == DateTimeKind.Utc && !timeZone.Equals(TimeZoneInfo.Utc))
{
convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Utc, timeZone);
}
offset = timeZone.GetUtcOffset(time);
if (time == convertedTime)
{
Console.WriteLine("{0} {1} ", time,
timeZone.IsDaylightSavingTime(time) ? timeZone.DaylightName : timeZone.StandardName);
Console.WriteLine(" It differs from UTC by {0} hours, {1} minutes.",
offset.Hours,
offset.Minutes);
}
else
{
Console.WriteLine("{0} {1} ", time,
time.Kind == DateTimeKind.Utc ? "UTC" : TimeZoneInfo.Local.Id);
Console.WriteLine(" converts to {0} {1}.",
convertedTime,
timeZone.Id);
Console.WriteLine(" It differs from UTC by {0} hours, {1} minutes.",
offset.Hours, offset.Minutes);
}
Console.WriteLine();
}
/// <summary>
/// Creates a new time record.
/// </summary>
public static TimeRecord Create(DateTime dateTime, TimeZoneInfo timeZone)
{
DateTime utcTime = dateTime.Kind == DateTimeKind.Utc ?
dateTime : TimeZoneInfo.ConvertTimeToUtc(dateTime, timeZone);
DateTime localTime;
if (dateTime.Kind == DateTimeKind.Utc && !timeZone.Equals(TimeZoneInfo.Utc))
{
localTime = TimeZoneInfo.ConvertTime(dateTime, TimeZoneInfo.Utc, timeZone);
}
else if (dateTime.Kind == DateTimeKind.Local && !timeZone.Equals(TimeZoneInfo.Local))
{
localTime = TimeZoneInfo.ConvertTime(dateTime, TimeZoneInfo.Local, timeZone);
}
else
{
localTime = dateTime;
}
DateTimeOffset timeOffset = new(localTime, timeZone.GetUtcOffset(dateTime));
return(new TimeRecord
{
Ms = timeOffset.ToUnixTimeMilliseconds(),
Ut = utcTime.ToString(WebUtils.JsDateTimeFormat),
Lt = timeOffset.ToString(WebUtils.JsDateTimeFormat)
});
}
// <Snippet1>
private void ShowPossibleUtcTimes(DateTime ambiguousTime, TimeZoneInfo timeZone)
{
// Determine if time is ambiguous in target time zone
if (!timeZone.IsAmbiguousTime(ambiguousTime))
{
Console.WriteLine("{0} is not ambiguous in time zone {1}.",
ambiguousTime,
timeZone.DisplayName);
}
else
{
// Display time and its time zone (local, UTC, or indicated by timeZone argument)
string originalTimeZoneName;
if (ambiguousTime.Kind == DateTimeKind.Utc)
{
originalTimeZoneName = "UTC";
}
else if (ambiguousTime.Kind == DateTimeKind.Local)
{
originalTimeZoneName = "local time";
}
else
{
originalTimeZoneName = timeZone.DisplayName;
}
Console.WriteLine("{0} {1} maps to the following possible times:",
ambiguousTime, originalTimeZoneName);
// Get ambiguous offsets
TimeSpan[] offsets = timeZone.GetAmbiguousTimeOffsets(ambiguousTime);
// Handle times not in time zone of timeZone argument
// Local time where timeZone is not local zone
if ((ambiguousTime.Kind == DateTimeKind.Local) && !timeZone.Equals(TimeZoneInfo.Local))
{
ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Local, timeZone);
}
// UTC time where timeZone is not UTC zone
else if ((ambiguousTime.Kind == DateTimeKind.Utc) && !timeZone.Equals(TimeZoneInfo.Utc))
{
ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Utc, timeZone);
}
// Display each offset and its mapping to UTC
foreach (TimeSpan offset in offsets)
{
if (offset.Equals(timeZone.BaseUtcOffset))
{
Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.StandardName, ambiguousTime - offset);
}
else
{
Console.WriteLine("If {0} is {1}, {2} UTC", ambiguousTime, timeZone.DaylightName, ambiguousTime - offset);
}
}
}
}
/// <summary>
/// Maps a date time in terms of Colombia time zone.
/// </summary>
/// <param name="dt"></param>
/// <returns></returns>
public static DateTime MapToLocalTimeColombia(this DateTime dt)
{
TimeZoneInfo timeZone = TimeZoneInfo.FindSystemTimeZoneById("SA Pacific Standard Time");
DateTime time = DateTime.UtcNow;
DateTime convertedTime = time;
if (time.Kind == DateTimeKind.Local && !timeZone.Equals(TimeZoneInfo.Local))
{
convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Local, timeZone);
}
else if (time.Kind == DateTimeKind.Utc && !timeZone.Equals(TimeZoneInfo.Utc))
{
convertedTime = TimeZoneInfo.ConvertTime(time, TimeZoneInfo.Utc, timeZone);
}
return(convertedTime);
}
public bool IsOpenAt(TimeSpan time)
{
TimeZoneInfo local = TimeZoneInfo.Local;
TimeSpan offset = TimeZoneInfo.Local.BaseUtcOffset;
// Is the store in the same time zone?
if (tz.Equals(local))
{
return(time >= open & time <= close);
}
else
{
TimeSpan delta = TimeSpan.Zero;
TimeSpan storeDelta = TimeSpan.Zero;
// Is it daylight saving time in either time zone?
if (local.IsDaylightSavingTime(DateTime.Now.Date + time))
{
delta = local.GetAdjustmentRules()[local.GetAdjustmentRules().Length - 1].DaylightDelta;
}
if (tz.IsDaylightSavingTime(TimeZoneInfo.ConvertTime(DateTime.Now.Date + time, local, tz)))
{
storeDelta = tz.GetAdjustmentRules()[tz.GetAdjustmentRules().Length - 1].DaylightDelta;
}
TimeSpan comparisonTime = time + (offset - tz.BaseUtcOffset).Negate() + (delta - storeDelta).Negate();
return(comparisonTime >= open & comparisonTime <= close);
}
}
public void Freeze(DateTime timeToFreeze)
{
var frozenTime = !timeZoneInfo.Equals(TimeZoneInfo.Local)
? timeToFreeze.ToLocalTime()
: timeToFreeze;
ClockManager.Freeze(frozenTime);
}
/// <summary>
/// Returns the coordinated universal time (UTC) that corresponds to a specified local time.
/// </summary>
/// <param name="time">The local date and time.</param>
/// <returns>
/// A <see cref="T:System.DateTime"></see> instance whose value is the UTC time that corresponds to time.
/// </returns>
public DateTime ToUniversalTime(DateTime time)
{
if (time.Kind == DateTimeKind.Local && !_timeZoneInfo.Equals(TimeZoneInfo.Local))
{
// if the time is local, and we can only recalculate from local
throw new ArgumentException(
"When specified the Local time (DateTime.Kind = Local), I can convert only from Local timezone!");
}
return(time.Kind == DateTimeKind.Utc
? time
: ConvertTimeToUtc(time));
}
public void Serialization_Deserialization()
{
TimeZoneInfo.TransitionTime start = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 1, 0, 0), 3, 5, DayOfWeek.Sunday);
TimeZoneInfo.TransitionTime end = TimeZoneInfo.TransitionTime.CreateFloatingDateRule(new DateTime(1, 1, 1, 2, 0, 0), 10, 5, DayOfWeek.Sunday);
TimeZoneInfo.AdjustmentRule rule = TimeZoneInfo.AdjustmentRule.CreateAdjustmentRule(DateTime.MinValue.Date, DateTime.MaxValue.Date, new TimeSpan(1, 0, 0), start, end);
TimeZoneInfo london = TimeZoneInfo.CreateCustomTimeZone("Europe/London", new TimeSpan(0), "Europe/London", "British Standard Time", "British Summer Time", new TimeZoneInfo.AdjustmentRule [] { rule });
MemoryStream stream = new MemoryStream();
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(stream, london);
stream.Position = 0;
TimeZoneInfo deserialized = (TimeZoneInfo)formatter.Deserialize(stream);
stream.Close();
stream.Dispose();
Assert.IsTrue(london.Equals(deserialized));
}
public static string GetPossibleUtcTimes(TimeZoneInfo timeZone, DateTime ambiguousTime)
{
StringBuilder oSB = new StringBuilder();
oSB.AppendLine(" Possible UTC Times for timezone:");
// Determine if time is ambiguous in target time zone
if (!timeZone.IsAmbiguousTime(ambiguousTime))
{
oSB.AppendFormat(" {0} is not ambiguous in time zone {1}.",
ambiguousTime,
timeZone.DisplayName);
}
else
{
// Display time and its time zone (local, UTC, or indicated by timeZone argument)
string originalTimeZoneName = string.Empty;;
if (ambiguousTime.Kind == DateTimeKind.Utc)
{
originalTimeZoneName = "UTC";
}
else if (ambiguousTime.Kind == DateTimeKind.Local)
{
originalTimeZoneName = "local time";
}
else
{
originalTimeZoneName = timeZone.DisplayName;
}
oSB.AppendFormat(" {0} {1} maps to the following possible times:",
ambiguousTime,
originalTimeZoneName);
// Get ambiguous offsets
TimeSpan[] offsets = timeZone.GetAmbiguousTimeOffsets(ambiguousTime);
// Handle times not in time zone of timeZone argument
// Local time where timeZone is not local zone
if ((ambiguousTime.Kind == DateTimeKind.Local) && !timeZone.Equals(TimeZoneInfo.Local))
{
ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Local, timeZone);
}
// UTC time where timeZone is not UTC zone
else if ((ambiguousTime.Kind == DateTimeKind.Utc) && !timeZone.Equals(TimeZoneInfo.Utc))
{
ambiguousTime = TimeZoneInfo.ConvertTime(ambiguousTime, TimeZoneInfo.Utc, timeZone);
}
// Display each offset and its mapping to UTC
foreach (TimeSpan offset in offsets)
{
if (offset.Equals(timeZone.BaseUtcOffset))
{
oSB.AppendFormat(" If {0} is {1}, {2} UTC", ambiguousTime, timeZone.StandardName, ambiguousTime - offset);
}
else
{
oSB.AppendFormat(" If {0} is {1}, {2} UTC", ambiguousTime, timeZone.DaylightName, ambiguousTime - offset);
}
}
}
return(oSB.ToString());
}