| Description |
The StrToDateTime function attempts to convert a date plus time as a string DateTime into a TDateTime value.
The first, date part of the string must adhere to the format of the ShortDateFormat value, and use the DateSeparator character to separate the day, month and year values.
The second, time part, separated by a blank from the date must adhere to the format of the LongTimeFormat value, and use the TimeSeparator character to separate the hour, minute and second values.
The default format in the UK is
day/month/year hour:minute:second.msec, where :
| The day | must be 1..31 (depending on month/year)
| | The month | must be 1..12 |
| The year | must be 0..9999 (optional) |
| The hour | must be 0..23 |
| The minute | must be 0..59 (optional) |
| The second | must be 0..59 (optional) |
| The milli-sec | must be 0..999 (optional) |
Omitting the year results in the use of the current year.
Note that year 0015, for example, must be given with the century digits; 15 on its own would be seen as a recent year.
If the year is 2 digits, the century is determined by the TwoDigitYearCenturyWindow value.
Any errors in the date/time string will yield EConvertError.
Version 2 of this function is for use within threads. You furnish the FormatSettings record before invoking the call. It takes a local copy of global formatting variables that make the routine thread safe.
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| Related commands |
| DateSeparator |
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The character used to separate display date fields |
| DateTimeToStr |
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Converts TDateTime date and time values to a string |
| LongTimeFormat |
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Long version of the time to string format |
| ShortDateFormat |
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Compact version of the date to string format |
| StrToDate |
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Converts a date string into a TDateTime value |
| StrToTime |
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Converts a time string into a TDateTime value |
| TimeAMString |
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Determines AM value in DateTimeToString procedure |
| TimePMString |
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Determines PM value in DateTimeToString procedure |
| TimeSeparator |
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The character used to separate display time fields |
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| Example code : Showing 2 and 4 digit year date string conversions |
var
myDateTime : TDateTime;
begin
myDateTime := StrToDateTime('23/02/75 12');
WriteLn('23/02/75 12 = '+DateTimeToStr(myDateTime));
myDateTime := StrToDateTime('23/02/2075 12:34:56');
WriteLn('23/02/2075 12:34:56 = '+DateTimeToStr(myDateTime));
end;
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| Show full unit code |
23/02/75 12 = 23/02/1975 12:00:00
23/02/2075 12:34:56 = 23/02/2075 12:34:56
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