Time zone in Asp.net

First, several applications of date-time conversion in Asp.net:

1.<ASP: boundcolumn datafield = "JoinTime" DATAFORMATSTRING = "{0: yyyy-MM-dd}"> <itemstyle width = "18%"> </ITEMSTYLE> </ASP: BOUNDCOLUMN>
2.E. Item. Cell [0]. Text = Convert. ToDateTime (e. Item. Cell [0]. Text). to1_datestring ();
3.String. Format ("yyyy-MM-dd", yourDateTime );
4.Convert. ToDateTime ("2005-8-23"). ToString ("yyMMdd", System. Globalization. DateTimeFormatInfo. InvariantInfo );
5.<Asp: BoundColumn DataField = "receipt time" HeaderText = "receipt time"
DataFormatString = "{0: yyyy-mm-dd}"> </asp: BoundColumn>
6.DateTime. Now. ToString ("yyyyMMddhhmmss ")
7.DateTime. Now. ToString ("yyyy/MM/dd hh: mm: ss ")
8. show only the year and month 
DataBinder. Eval (Container. DataItem, "starttime", "{0: yyyy-M }")
9.<Asp: BoundColumn DataField = "receipt time" HeaderText = "receipt time"
DataFormatString = "{0: yyyy-MM-dd HH24: mm: ss}"> </asp: BoundColumn>

 

Second, the list of valid time zones in the system:

1. Obtain the time zone list based on the local time:

DateTimeOffset chinaDate = DateTimeOffset. Now; // current local time
Response. Write (chinaDate. ToString () + "<br/> ");

ReadOnlyCollection <TimeZoneInfo> zones = TimeZoneInfo. GetSystemTimeZones (); // list of Time Zone identifiers in the system
Foreach (TimeZoneInfo timeZoneInfo in zones)
{

// Obtain the Greenwich mean time through the local time, and obtain the names of different time zone IDs and their corresponding time through the standard time
DateTimeOffset easternDate = TimeZoneInfo. ConvertTime (chinaDate. UtcDateTime,
TimeZoneInfo. FindSystemTimeZoneById (timeZoneInfo. Id ));
Response. Write (timeZoneInfo. Id + ": & nbsp ;"
+ EasternDate. ToString () + "<br/> ");
}

The result is as follows:

14:33:12 +
Greenwich Standard Time: 6:33:12 +
GMT Standard Time: 7:33:12 +
W. Central Africa Standard Time: 7:33:12 +
Romance Standard Time: 8:33:12 +
Central European Standard Time: 8:33:12 +
Central Europe Standard Time: 8:33:12 +
W. Europe Standard Time: 8:33:12 +
South Africa Standard Time: 8:33:12 +
E. Europe Standard Time: 9:33:12 +
Egypt Standard Time: 9:33:12 +
Israel Standard Time: 8:33:12 +
FLE Standard Time: 9:33:12 +
GTB Standard Time: 9:33:12 +
E. Africa Standard Time: 9:33:12 +
Arabic Standard Time: 10:33:12 +
Arab Standard Time: 9:33:12 +
Russian Standard Time: 10:33:12 +
Iran Standard Time: 11:03:12 +
Caucasus Standard Time: 11:33:12 +
Arabian Standard Time: 10:33:12 +
Afghanistan Standard Time: 11:03:12 +
West Asia Standard Time: 11:33:12 +
Ekaterinburg Standard Time: 12:33:12 +
India Standard Time: 12:03:12 +
Nepal Standard Time: 12:18:12 +
Sri Lanka Standard Time: 12:33:12 +
N. Central Asia Standard Time: 13:33:12 +
Central Asia Standard Time: 12:33:12 +
Myanmar Standard Time: 13:03:12 +
North Asia Standard Time: 14:33:12 +
SE Asia Standard Time: 13:33:12 +
North Asia East Standard Time: 15:33:12 +
China Standard Time: 14:33:12 +
Taipei Standard Time: 14:33:12 +
Singapore Standard Time: 14:33:12 +
W. Australia Standard Time: 14:33:12 +
Tokyo Standard Time: 15:33:12 +
Korea Standard Time: 15:33:12 +
Yakutsk Standard Time: 16:33:12 +
AUS Central Standard Time: 16:03:12 +
Cen. Australia Standard Time: 16:03:12 +
West Pacific Standard Time: 16:33:12 +
AUS Eastern Standard Time: 16:33:12 +
E. Australia Standard Time: 16:33:12 +
Invalid Vostok Standard Time: 17:33:12 +
Tasmania Standard Time: 16:33:12 +
Central Pacific Standard Time: 17:33:12 +
New Zealand Standard Time: 18:33:12 +
Fiji Standard Time: 18:33:12 +
Tonga Standard Time: 19:33:12 +
Azores Standard Time: 6:33:12 +
Cape Verde Standard Time: 5:33:12 +
Mid-Atlantic Standard Time: 5:33:12 +
E. South America Standard Time: 3:33:12 +
SA Eastern Standard Time: 3:33:12 +
Greenland Standard Time: 4:33:12 +
Newfoundland Standard Time: 4:03:12 +
SA Western Standard Time: 2:33:12 +
Pacific SA Standard Time: 2:33:12 +
Atlanta Standard Time: 3:33:12 +
Eastern Standard Time: 2:33:12 +
US Eastern Standard Time: 1:33:12 +
SA Pacific Standard Time: 1:33:12 +
Central America Standard Time: 0:33:12 +
Central Standard Time: 1:33:12 +
Canada Central Standard Time: 0:33:12 +
Mexico Standard Time: 1:33:12 +
US Mountain Standard Time: 23:33:12 +
Mountain Standard Time: 0:33:12 +
Mexico Standard Time 2: 0:33:12 +
Pacific Standard Time: 23:33:12 +
Alaskan Standard Time: 22:33:12 +
Hawaiian Standard Time: 20:33:12 +
Samoa Standard Time: 19:33:12 +
Dateline Standard Time: 18:33:12 +

 

Second, get the client Time Zone offset (javascript ):
Var zone = new Date (). getTimezoneOffset ()/60 *-1;

 

Finally, get the time that should be correctly displayed on the client:

// ServerZoneID is the ID of the Time zone where the database is located, for example, "Eastern Standard Time" in the list above"

DateTimeOffset serverDateTime = TimeZoneInfo. ConvertTime (
DatabaseDateTime, TimeZoneInfo. FindSystemTimeZoneById (serverZoneID ));

// Zone indicates the client Time zone offset.

ServerDateTime. UtcDateTime. AddHours (zone );