C # Date formatting

Date conversion
DateTime d t= DateTime.Now;	‘
Dt. ToString ();	' 2005-11-5 13:21:25
Dt. Tofiletime (). ToString ();	' 127756416859912000
Dt. TOFILETIMEUTC (). ToString ();	127756704859912816
Dt. ToLocalTime (). ToString ();	' 2005-11-5 21:21:25
Dt. Tolongdatestring (). ToString ();	' 2005-11-5
Dt. Tolongtimestring (). ToString ();	' 13:21:25
Dt. ToOADate (). ToString ();	' 38661.5565508218
Dt. ToShortDateString (). ToString ();	' 2005-11-5
Dt. Toshorttimestring (). ToString ();	' 13:21
Dt. ToUniversalTime (). ToString ();	' 2005-11-5 5:21:25
Dt. Year.tostring ();	' 2005
Dt. Date.tostring ();	' 2005-11-5 0:00:00
Dt. Dayofweek.tostring ();	' Saturday
Dt. Dayofyear.tostring ();	' 309
Dt. Hour.tostring ();	' 13
Dt.Millisecond.ToString ();	' 441
Dt. Minute.tostring ();	' 30
Dt. Month.tostring ();	' 11
Dt. Second.tostring ();	' 28
Dt. Ticks.tostring ();	' 632667942284412864
Dt. Timeofday.tostring ();	' 13:30:28.4412864
Dt. ToString ();	' 2005-11-5 13:47:04
Dt. AddYears (1). ToString ();	' 2006-11-5 13:47:04
Dt. AddDays (1.1). ToString ();	' 2005-11-6 16:11:04
Dt. AddHours (1.1). ToString ();	' 2005-11-5 14:53:04
Dt. Addmilliseconds (1.1). ToString ();	' 2005-11-5 13:47:04
Dt. AddMonths (1). ToString ();	' 2005-12-5 13:47:04
Dt. AddSeconds (1.1). ToString ();	' 2005-11-5 13:47:05
Dt. AddMinutes (1.1). ToString ();	' 2005-11-5 13:48:10
Dt. Addticks (1000). ToString ();	' 2005-11-5 13:47:04
Dt.compareto (DT). ToString ();	' 0
Dt. ADD (?). ToString ();	' Question mark is a time period
Dt. Equals ("2005-11-6 16:11:04"). ToString ();	' False
Dt. Equals (DT). ToString ();	' True
Dt. GetHashCode (). ToString ();	' 1474088234
Dt. GetType (). ToString ();	' System.DateTime
Dt. GetTypeCode (). ToString ();	' DateTime
Dt. Getdatetimeformats (' s ') [0]. ToString ();	' 2005-11-05t14:06:25
Dt. Getdatetimeformats (' t ') [0]. ToString ();	' 14:06
Dt. Getdatetimeformats (' y ') [0]. ToString ();	' 2005 year one month
Dt. Getdatetimeformats (' D ') [0]. ToString ();	' 2005 5 days a month
Dt. Getdatetimeformats (' D ') [1]. ToString ();	' 2005 11 05
Dt. Getdatetimeformats (' D ') [2]. ToString ();	' Saturday 2005
Dt. Getdatetimeformats (' D ') [3]. ToString ();	' Saturday 2005 5 days a month
Dt. Getdatetimeformats (' M ') [0]. ToString ();	' 5 days a month
Dt. Getdatetimeformats (' f ') [0]. ToString ();	' 2005 year 5 Day 14:06
Dt. Getdatetimeformats (' g ') [0]. ToString ();	' 2005-11-5 14:06
Dt. Getdatetimeformats (' R ') [0]. ToString ();	' Sat, Nov 2005 14:06:25 GMT
String. Format ("{0:d}", DT);	' 2005-11-5
String. Format ("{0:d}", DT);	' 2005 5 days a month
String. Format ("{0:f}", DT);	' 2005 year 5 Day 14:23
String. Format ("{0:f}", DT);	' 2005 year 5 Day 14:23:23
String. Format ("{0:g}", DT);	' 2005-11-5 14:23
String. Format ("{0:g}", DT);	' 2005-11-5 14:23:23
String. Format ("{0:m}", DT);	' 5 days a month
String. Format ("{0:r}", DT);	' Sat, Nov 2005 14:23:23 GMT
String. Format ("{0:s}", DT);	' 2005-11-05t14:23:23
String. Format ("{0:t}", DT);	' 14:23
String. Format ("{0:t}", DT);	' 14:23:23
String. Format ("{0:u}", DT);	' 2005-11-05 14:23:23z
String. Format ("{0:u}", DT);	' 2005 year 5 Day 6:23:23
String. Format ("{0:y}", DT);	' 2005 year one month
String. Format ("{0}", DT);	' 2005-11-5 14:23:23
String. Format ("{0:yyyymmddhhmmssffff}", DT); Compare two time sizes 1, time-size experiments String st1= "12:13"; String st2= "14:14"; DateTime Dt1=convert.todatetime (ST1); DateTime Dt2=convert.todatetime (ST2); DateTime Dt3=datetime.now; if (Datetime.compare (DT1,DT2) >0) Msg. text=st1+ ">" +ST2; Else Msg. Text=st1+ "<" +ST2; Msg. text+= "\ r \ n" +dt1. ToString (); if (Datetime.compare (DT1,DT3) >0) Msg. text+= "\ r \ n" +st1+ ">" +DT3. ToString (); Else Msg. text+= "\ r \ n" +st1+ "<" +DT3. ToString (); 2. Calculates the function of two time difference value, returns the absolute value of the time difference: private String DateDiff (DateTime datetime1,datetime DateTime2) { String Datediff=null; Try { TimeSpan ts1=new TimeSpan (Datetime1.ticks); TimeSpan ts2=new TimeSpan (Datetime2.ticks); TimeSpan Ts=ts1. Subtract (TS2). Duration (); Datediff=ts. Days.tostring () + "Day" +ts. Hours.tostring () + "hours" +ts. Minutes.tostring () + "minutes" +ts. Seconds.tostring () + "seconds"; } Catch { } return DateDiff; } 3. Realize the function of calculating datetime1-36 day =datetime2 TimeSpan ts=new TimeSpan (40,0,0,0); DateTime dt2=datetime.now.subtract (TS); Msg. Text=datetime.now.tostring () + "-" +ts. Days.tostring () + "days \ r \ n"; Msg. Text+=dt2. ToString (); ‘

C # Date formatting