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function TryStrToDateTime(const S: string; out Value: TDateTime): Boolean;
function TryStrToDateTime(const S: string; out Value: TDateTime;
const AFormatSettings: TFormatSettings): Boolean;


extern DELPHI_PACKAGE bool __fastcall TryStrToDateTime(const System::UnicodeString S, /* out */ System::TDateTime &Value)/* overload */;


Type Visibility Source Unit Parent
function public
System.SysUtils System.SysUtils


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

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 A.M. or P.M. 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 A.M. or P.M. is not specified.

Year values from 0 through 99 are converted using the TwoDigitYearCenturyWindow. This value is stored either in a global variable (first form) or as a field in the AFormatSettings 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 AFormatSettings parameter. Before calling the thread-safe form of TryStrToDateTime, you must populate AFormatSettings with localization information. To populate AFormatSettings with a set of default locale values, call TFormatSettings.Create.

See Also