RAD Studio VCL Reference
SysUtils.TryStrToDateTime Function

Converts a string to a TDateTime value with a Boolean success code.

function TryStrToDateTime(const S: string; out Value: TDateTime): Boolean; overload;
function TryStrToDateTime(const S: string; out Value: TDateTime; const FormatSettings: TFormatSettings): Boolean; overload;
Boolean TryStrToDateTime(const AnsiString S, TDateTime Value);
Boolean TryStrToDateTime(const AnsiString S, TDateTime Value, const TFormatSettings FormatSettings);

Call TryStrToDateTime to parse a string that specifies a date and time value. If S does not contain a valid date, TryStrToDateTime returns false.  

The S parameter must use the current locale's date/time format. In the US, this is commonly MM/DD/YY HH:MM:SS format. Specifying AM or PM as part of the time is optional, as are the seconds. Use 24-hour time (7:45 PM is entered as 19:45, for example) if AM or PM is not specified.  

Year values between 0 and 99 are converted using the TwoDigitYearCenturyWindow. This value is stored either in a global variable (first form) or as a field in the FormatSettings parameter (second form) See "Currency and Date-Time Formatting Variables" for more information.  

The first form of TryStrToDateTime is not thread-safe, because it uses localization information contained in global variables. The second form of TryStrToDateTime, which is thread-safe, refers to localization information contained in the FormatSettings parameter. Before calling the thread-safe form of TryStrToDateTime, you must populate FormatSettings with localization information. To populate FormatSettings with a set of default locale values, call GetLocaleFormatSettings


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