DateTime.now不响应时区更改

Question

I build a clock using DateTime.now and receive a time zone from a server. the problem is that the DateTime still keeps using the old time zone.

(I want it to start using the new time zone set when I receive without having to reboot)

How do I get around this problem?

Answer 1

You have to Clear the Time Cash after changing Time. Use the following Command:

TimeZoneInfo.ClearCachedData()

for more details: http://www.c-sharpcorner.com/Forums/Thread/240283/datetime-is-not-reflected-instantly-when-time-zone-changes.aspx

Answer 2

You need to convert the current local time into the desired timezone. Something like this:

var timeInServerTimezone = TimeZoneInfo.ConvertTime(DateTime.Now, timeZoneInfoReceivedFromServer);

Answer 3

Have you tried using the TimeZone class instead of DateTime? I am not sure if it will make a difference but worth taking a look.

 DateTime baseUTC = new DateTime( 2000, 1, 1 );
 TimeZone localZone = TimeZone.CurrentTimeZone;
 DateTime localTime = localZone.ToLocalTime( baseUTC );