The C # language method for "date time string in string format to datetime type"

Method One:convert.todatetime (String)

The string format is required and must be YYYY-MM-DD HH:MM:SS

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Method Two: Convert.todatetime (String, IFormatProvider)

DateTime DT;

DateTimeFormatInfo Dtformat = new System.globalizationdatetimeformatinfo ();

Dtformat.shortdatepattern = "YYYY/MM/DD";

DT = Convert.todatetime ("2011/05/26", Dtformat);

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Method Two:datetime.parseexact ()

String datestring = "20110526";

DateTime dt = DateTime.ParseExact (datestring, "YyyyMMdd", System. Globalization. CultureInfo. CurrentCulture);

Or

DateTime dt = DateTime.ParseExact (datestring, "YyyyMMdd", System. Globalization. CultureInfo. InvariantCulture);

Reference information:

CultureInfo CultureInfo = cultureinfo.createspecificculture ("en-us"); string format = "ddd MMM d HH:mm:ss zz00 yyyy"; strin G stringvalue = DateTime.Now.ToString (format, cultureInfo); Get date string datetime datetime = DateTime.ParseExact ("Wed 16:28:03 +0800", format, cultureInfo); Convert a string into a date

Other

Date format: YyyyMMdd HH:mm:ss (note the letter case of this string is strict)
YYYY: Year of representation
MM: On behalf of the month
DD: Representative Day
HH: Representative hour (24-hour system)
MM: Represents minutes
SS: Represents seconds
DateTime.Now.ToShortTimeString ()
DateTime dt = DateTime.Now;
Dt. ToString ();//2005-11-5 13:21:25
Dt. Tofiletime (). ToString ();//127756416859912816
Dt. TOFILETIMEUTC (). ToString ();//127756704859912816
Dt. ToLocalTime (). ToString ();//2005-11-5 21:21:25
Dt. Tolongdatestring (). ToString ();//November 5, 2005
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 ();//November 2005
Dt. Getdatetimeformats (' D ') [0]. ToString ();//November 5, 2005
Dt. Getdatetimeformats (' D ') [1]. ToString ();//2005 11 05
Dt. Getdatetimeformats (' D ') [2]. ToString ();//Saturday 2005 11 05
Dt. Getdatetimeformats (' D ') [3]. ToString ();//Saturday November 5, 2005
Dt. Getdatetimeformats (' M ') [0]. ToString ();//November 5
Dt. Getdatetimeformats (' f ') [0]. ToString ();//November 5, 2005 14:06
Dt. Getdatetimeformats (' g ') [0]. ToString ();//2005-11-5 14:06
Dt. Getdatetimeformats (' R ') [0]. ToString ();//sat, 2005 14:06:25 GMT
String. Format ("{0:d}", DT);//2005-11-5
String. Format ("{0}", dt);//November 5, 2005
String. Format ("{0:f}", dt);//November 5, 2005 14:23
String. Format ("{0:f}", dt);//November 5, 2005 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);//November 5
String. Format ("{0:r}", DT);//sat, 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);//November 5, 2005 6:23:23
String. Format ("{0:y}", dt);//November 2005
String. Format ("{0}", dt);//2005-11-5 14:23:23
String. Format ("{0:yyyymmddhhmmssffff}", DT);
Calculates the difference in the number of days between 2 dates
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DateTime dt1 = Convert.datetime ("2007-8-1");
DateTime DT2 = Convert.datetime ("2007-8-15");
TimeSpan span = dt2. Subtract (DT1);
int Daydiff = span. Days + 1;
Calculate the number of days of the month in a year
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int days = Datetime.daysinmonth (2007, 8);
days = 31;
Add one day to date, one day less
-----------------------------------------------
DateTime DT =datetime.now;
Dt. AddDays (1); Add one day
Dt. AddDays (-1);//Decrease One day
Other years method similar ...
Convert Date function in Oracle sql
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To_date ("2007-6-6", "yyyy-mm-dd");
To_date ("2007/6/6", "yyyy/mm/dd");

The C # language method for "date time string in string format to datetime type"