protected DateTime ToLocalTime(DateTime utc)
{
if (utc.Kind == DateTimeKind.Local)
{
return(utc);
}
var local = utc.AddSeconds(_systemTimeZone.SecondsFromGMT(utc.ToNSDate())).WithKind(DateTimeKind.Local);
return(local);
}
/// <summary>
/// Converts the UTCT o local time zone.
/// </summary>
/// <returns>The UTCT o local time zone.</returns>
/// <param name="dateTimeUtc">Date time UTC.</param>
public DateTime ConvertUtcToLocalTimeZone(DateTime dateTimeUtc)
{
var sourceTimeZone = new NSTimeZone("UTC");
var destinationTimeZone = NSTimeZone.LocalTimeZone;
var sourceDate = DateUtility.DateTimeToNativeDate(dateTimeUtc);
var sourceGmtOffset = (int)sourceTimeZone.SecondsFromGMT(sourceDate);
var destinationGmtOffset = (int)destinationTimeZone.SecondsFromGMT(sourceDate);
var interval = destinationGmtOffset - sourceGmtOffset;
var destinationDate = sourceDate.AddSeconds(interval);
var dateTime = DateUtility.NativeDateToDateTime(destinationDate);
return(dateTime);
}
private static DateTime NSDateToDateTime(MonoTouch.Foundation.NSDate sourceDate)
{
NSTimeZone sourceTimeZone = new NSTimeZone("UTC");
NSTimeZone destinationTimeZone = NSTimeZone.LocalTimeZone;
int sourceGMTOffset = sourceTimeZone.SecondsFromGMT(sourceDate);
int destinationGMTOffset = destinationTimeZone.SecondsFromGMT(sourceDate);
int interval = destinationGMTOffset - sourceGMTOffset;
var destinationDate = sourceDate.AddSeconds(interval);
var dateTime = new DateTime(2001, 1, 1, 0, 0, 0).AddSeconds(destinationDate.SecondsSinceReferenceDate);
return dateTime;
}
public void TestComponentsInTimeZone()
{
RequiresIos8();
NSTimeZone currentZone = NSTimeZone.LocalTimeZone;
NSTimeZone otherZone = new NSTimeZone("Asia/Bangkok");
if (currentZone.SecondsFromGMT(NSDate.Now) == otherZone.SecondsFromGMT(NSDate.Now))
{
Assert.Inconclusive("Same time zone, change Asia/Bangkok");
}
NSDateComponents components = NSCalendar.CurrentCalendar.ComponentsInTimeZone(otherZone, NSDate.Now);
Assert.IsTrue(components.Hour != NSCalendar.CurrentCalendar.Components(NSCalendarUnit.Hour, NSDate.Now).Hour, "Different time zones should have different hours");
}
public DateTime ConvertUTCToLocalTimeZone(DateTime dateTimeUtc)
{
NSTimeZone sourceTimeZone = new NSTimeZone("UTC");
NSTimeZone destinationTimeZone = NSTimeZone.LocalTimeZone;
NSDate sourceDate = DateTimeToNativeDate(dateTimeUtc);
int sourceGMTOffset = (int)sourceTimeZone.SecondsFromGMT(sourceDate);
int destinationGMTOffset = (int)destinationTimeZone.SecondsFromGMT(sourceDate);
int interval = sourceGMTOffset - destinationGMTOffset;
var destinationDate = dateTimeUtc.AddSeconds(interval);
//var destinationDate = sourceDate.AddSeconds(interval);
//var dateTime = NativeDateToDateTime(destinationDate);
return(destinationDate);
}
