| Example code : Showing all of the date field formatting data types |
| var myDate : TDateTime; begin // Set up our TDateTime variable with a full date and time : // 5th of June 2000 at 01:02:03.004 (.004 milli-seconds) myDate := EncodeDateTime(2000, 6, 5, 1, 2, 3, 4); // Date only - numeric values with no leading zeroes (except year) ShowMessage(' d/m/y = '+ FormatDateTime('d/m/y', myDate)); // Date only - numeric values with leading zeroes ShowMessage(' dd/mm/yy = '+ FormatDateTime('dd/mm/yy', myDate)); // Use short names for the day, month, and add freeform text ('of') ShowMessage(' ddd d of mmm yyyy = '+ FormatDateTime('ddd d of mmm yyyy', myDate)); // Use long names for the day and month ShowMessage('dddd d of mmmm yyyy = '+ FormatDateTime('dddd d of mmmm yyyy', myDate)); // Use the ShortDateFormat settings only ShowMessage(' ddddd = '+ FormatDateTime('ddddd', myDate)); // Use the LongDateFormat settings only ShowMessage(' dddddd = '+ FormatDateTime('dddddd', myDate)); // Use the ShortDateFormat + LongTimeFormat settings ShowMessage(' c = '+ FormatDateTime('c', myDate)); end; |
| Show full unit code |
| d/m/y = 5/6/00 dd/mm/yy = 05/06/00 ddd d of mmm yyyy = Mon 5 of Jun 2000 dddd d of mmmm yyyy = Monday 5 of June 2000 ddddd = 05/06/2000 dddddd = 05 June 2000 c = 05/06/2000 01:02:03 |
| Example code : Showing all of the time field formatting data types |
| var myDate : TDateTime; begin // Set up our TDateTime variable with a full date and time : // 5th of June 2000 at 01:02:03.004 (.004 milli-seconds) myDate := EncodeDateTime(2000, 6, 5, 1, 2, 3, 4); // Time only - numeric values with no leading zeroes ShowMessage(' h:n:s.z = '+FormatDateTime('h:n:s.z', myDate)); // Time only - numeric values with leading zeroes ShowMessage('hh:nn:ss.zzz = '+FormatDateTime('hh:nn:ss.zzz', myDate)); // Use the ShortTimeFormat settings only ShowMessage(' t = '+FormatDateTime('t', myDate)); // Use the LongTimeFormat settings only ShowMessage(' tt = '+FormatDateTime('tt', myDate)); // Use the ShortDateFormat + LongTimeFormat settings ShowMessage(' c = '+FormatDateTime('c', myDate)); end; |
| Show full unit code |
| h:m:s.z = 1:2:3.4 hh:mm:ss.zzz = 01:02:03.004 t = 01:02 tt = 01:02:03 c = 05/06/2000 01:02:03 |
| Example code : Showing the effect of local date format settings |
| var myDate : TDateTime; begin // Set up our TDateTime variable with a full date and time : // 5th of June 2049 at 01:02:03.004 (.004 milli-seconds) // // Note that 49 is treated as 2049 as follows : // TwoDigitYearCenturyWindow => 50 // Current year => 2008 (at time of writing) // Subtract TwoDigitYearCenturyWindow => 1958 // 2 digit year to be converted => 49 // Compare with the last 2 digits of 1958 => Less // So the year is in the next century => 2049 // (58 would be converted to 1958) myDate := StrToDateTime('05/06/49 01:02:03.004'); // Demonstrate default locale settings // Use the DateSeparator and TimeSeparator values ShowMessage('dd/mm/yy hh:nn:ss = '+ FormatDateTime('dd/mm/yy hh:nn:ss', myDate)); // Use ShortMonthNames ShowMessage(' mmm = '+FormatDateTime('mmm', myDate)); // Use LongMonthNames ShowMessage(' mmmm = '+FormatDateTime('mmmm', myDate)); // Use ShortDayNames ShowMessage(' ddd = '+FormatDateTime('ddd', myDate)); // Use LongDayNames ShowMessage(' dddd = '+FormatDateTime('dddd', myDate)); // Use the ShortDateFormat string ShowMessage(' ddddd = '+FormatDateTime('ddddd', myDate)); // Use the LongDateFormat string ShowMessage(' dddddd = '+FormatDateTime('dddddd', myDate)); // Use the TimeAmString ShowMessage(' hhampm = '+FormatDateTime('hhampm', myDate)); // Use the ShortTimeFormat string ShowMessage(' t = '+FormatDateTime('t', myDate)); // Use the LongTimeFormat string ShowMessage(' tt = '+FormatDateTime('tt', myDate)); // Use the TwoDigitCenturyWindow ShowMessage(' dd/mm/yyyy = '+ FormatDateTime('dd/mm/yyyy', myDate)); ShowMessage(''); // Now change the defaults DateSeparator := '-'; TimeSeparator := '_'; ShortDateFormat := 'dd/mmm/yy'; LongDateFormat := 'dddd dd of mmmm of yyyy'; TimeAMString := 'morning'; TimePMString := 'afternoon'; ShortTimeFormat := 'hh:nn:ss'; LongTimeFormat := 'hh : nn : ss . zzz'; ShortMonthNames[6] := 'JUN'; LongMonthNames[6] := 'JUNE'; ShortDayNames[1] := 'SUN'; LongDayNames[1] := 'SUNDAY'; TwoDigitYearCenturyWindow := 75; // This means 49 is treated as 1949 // Set up our TDateTime variable with the same value as before // except that we must use the new date and time separators // The TwoDigitYearCenturyWindow variable only takes effect here myDate := StrToDateTime('09-02-49 01_02_03.004'); // Use the DateSeparator and TimeSeparator values ShowMessage('dd/mm/yy hh:nn:ss = '+ FormatDateTime('dd/mm/yy hh:nn:ss', myDate)); // Use ShortMonthNames ShowMessage(' mmm = '+FormatDateTime('mmm', myDate)); // Use LongMonthNames ShowMessage(' mmmm = '+FormatDateTime('mmmm', myDate)); // Use ShortDayNames ShowMessage(' ddd = '+FormatDateTime('ddd', myDate)); // Use LongDayNames ShowMessage(' dddd = '+FormatDateTime('dddd', myDate)); // Use the ShortDateFormat string ShowMessage(' ddddd = '+FormatDateTime('ddddd', myDate)); // Use the LongDateFormat string ShowMessage(' dddddd = '+FormatDateTime('dddddd', myDate)); // Use the TimeAmString ShowMessage(' hhampm = '+FormatDateTime('hhampm', myDate)); // Use the ShortTimeFormat string ShowMessage(' t = '+FormatDateTime('t', myDate)); // Use the LongTimeFormat string ShowMessage(' tt = '+FormatDateTime('tt', myDate)); // Use the TwoDigitCenturyWindow ShowMessage(' dd/mm/yyyy = '+ FormatDateTime('dd/mm/yyyy', myDate)); end; |
| Show full unit code |
| dd/mm/yy hh:mm:ss = 05/06/49 01:02:03 mmm = Jun mmmm = June ddd = Sat dddd = Saturday ddddd = 05/06/2049 dddddd = 05 June 2049 hhampm = 01AM t = 01:02 tt = 01:02:03 dd/mm/yyyy = 05/06/2049 dd/mm/yy hh:nn:ss = 05-06-49 01_02_03 mmm = JUN mmmm = JUNE ddd = SUN dddd = SUNDAY ddddd = 05-JUN-49 dddddd = SUNDAY 05 of JUNE of 1949 hhampm = 01morning t = 01_02_03 tt = 01 _ 02 _ 03 . 004 dd/mm/yyyy = 05-06-1949 |
Source : www.delphibasics.co.uk
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