Usage of formatdatetime

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FormatDateTime Usage of Statement ： function FormatDateTime(const Format: string; DateTime: TDateTime): string; overload; Of course and Format Same, there is another kind , But here we only introduce the first commonly used Format Parameter is a formatted string .DateTime Is the time type . The return value is a formatted character string Point of view Format Instruction characters in parameters c Display time in short time format , That is, it is all the representation of numbers FormatdateTime(‘c’,now); Output is ：2004-8-7 9:55:40 d Corresponds to the date in the time , If the date is one digit, one digit will be displayed , Two digits show two FormatdateTime(‘d’,now); The output may be 1～31 dd and d It means the same thing , But it is always displayed in two digits FormatdateTime(‘dd’,now); The output may be 01～31 ddd It shows the day of the week FormatdateTime(‘ddd’,now); Output is : Saturday dddd and ddd It shows the same . But the above two may be different in other countries . ddddd Display year, month and day in short time format FormatdateTime(‘ddddd’,now); Output is ：2004-8-7 dddddd Display year, month, and day in a long format FormatdateTime(‘dddddd’,now); Output is ：2004 year 8 month 7 Japan e/ee/eee/eeee Display the year in corresponding digits FormatdateTime(‘ee’,now); Output is ：04 （ Express 04 year ） m/mm/mmm/mmmm Represents the month FormatdateTime(‘m’,now); Output is ：8 FormatdateTime(‘mm’,now); Output is 08 FormatdateTime(‘mmm’,now); Output is August FormatdateTime(‘mmmm’,now); Output is August and ddd/dddd equally , It may be different in other countries yy/yyyy Indicate year FormatdateTime(‘yy’,now); Output is 04 FormatdateTime(‘yyyy’,now); Output is 2004 h/hh,n/nn,s/ss,z/zzz Hours, respectively , branch , second , millisecond t Display time in short time format FormatdateTime(‘t’,now); Output is 10:17 tt Display time in long format FormatdateTime(‘tt’,now); Output is 10:18:46 ampm Show morning or afternoon in a long format FormatdateTime(‘ttampm’,now); Output is ：10:22:57 In the morning About that , If you want to in Format Add ordinary string , You can use double quotation marks to separate those Specific characters , In this way, if the ordinary string contains special characters, it will not be displayed as Time format ： FormatdateTime(‘”today is” c’,now); Output is ：today is 2004-8-7 10:26:58 You can also add ”-“ or ”/” To separate the dates ： FormatdateTime(‘”today is” yy-mm-dd’,now); FormatdateTime(‘”today is” yy/mm/dd’,now); Output is ： today is 04-08-07 It can also be used. ”:” To separate the time FormatdateTime(‘”today is” hh:nn:ss’,now); Output is ：today is 10:32:23

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