C # get current time and sync time

http://blog.163.com/[email protected]/blog/static/549639712010112921658843/we can get the current time by using the Datatime class. We can get different times by invoking various methods in the class: Date (2008-09-04), Time (12:12:12), date + time (2008-09-04 12:11:10), etc.

Get Date + Time
DateTime.Now.ToString (); 2008-9-4 20:02:10
DateTime.Now.ToLocalTime ().        ToString (); 2008-9-4 20:12:12

Get Date
DateTime.Now.ToLongDateString ().    ToString (); September 4, 2008
DateTime.Now.ToShortDateString ().    ToString (); 2008-9-4
DateTime.Now.ToString ("Yyyy-mm-dd"); 2008-09-04
DateTime.Now.Date.ToString (); 2008-9-4 0:00:00

Get time
DateTime.Now.ToLongTimeString ().   ToString (); 20:16:16
DateTime.Now.ToShortTimeString ().   ToString (); 20:16
DateTime.Now.ToString ("Hh:mm:ss"); 08:05:57
DateTime.Now.TimeOfDay.ToString (); 20:33:50.7187500

Other
Datetime.tofiletime ().       ToString (); 128650040212500000
DATETIME.NOW.TOFILETIMEUTC ().   ToString (); 128650040772968750
DateTime.Now.ToOADate ().       ToString (); 39695.8461709606
DateTime.Now.ToUniversalTime ().   ToString (); 2008-9-4 12:19:14

DateTime.Now.Year.ToString (); Get year//2008
DateTime.Now.Month.ToString (); Get Month//9
DateTime.Now.DayOfWeek.ToString (); Get Week//Thursday
DateTime.Now.DayOfYear.ToString (); Get the day of the Week//248
DateTime.Now.Hour.ToString (); Get hours//20
DateTime.Now.Minute.ToString (); Get minutes//31
DateTime.Now.Second.ToString (); Gets the number of seconds//45

N is a number, can be a number of integers, can also matter a decimal
Dt. AddYears (n).   ToString (); Time Plus n years
Dt. AddDays (n).   ToString (); Plus n days
Dt. AddHours (n).   ToString (); Add N Hours
Dt. AddMonths (n).   ToString (); Add n months
Dt. AddSeconds (n).   ToString (); Plus n seconds
Dt. AddMinutes (n).   ToString (); Add n Points

SQL statements use time and date functions

GETDATE (): Gets the current time of the system
DATEADD (datepart,number,date): Calculates a new time value after a time based on a time, such as: DateAdd (Yy,30,getdate ())
DateDiff (datepart,startdate,enddate): Calculates the difference of two time, such as: DateDiff (Yy,getdate (), ' 2008-08-08 ')
Dataname (datepart,date): Gets the value of a different part of time, the return value is a string
DatePart (datepart,date): Similar to Datename, except that the return value is integer type
Day: Gets the number of days of the specified time
Month (date): Gets the month of the specified time
Year (date): Gets the years of the specified time

Select year (GETDATE ()): Current Years

Sync Time:

Http://www.jb51.net/article/65365.htm

C # get current time and sync time