Delphi Basics : FileAge command

DelphiBasics

FileAge
Function

Get the last modified date/time of a file without opening it

SysUtils unit

function FileAge(const FileName string):Integer;

Description

The FileAge function returns the last modified date and time of a file FileName.

There is no need to open or close the file - this function handles these operations silently for you.

The returned value is in a 32 bit partitioned format. Use the FiledateToDateTime function to convert into a manageable TDateTime value.

If the file date could not be found (for example, the FileName was invalid), then -1 is returned.

Related commands

DateTimeToFileDate		Convert a TDateTime value to a File date/time format
FileDateToDateTime		Converts a file date/time format to a TDateTime value
FileSetDate		Set the last modified date and time of a file
FileGetAttr		Gets the attributes of a file
FileSetAttr		Sets the attributes of a file

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Example code : Get the last modified date of the current Unit form file

var
  fileName   : string;
  fileDate   : Integer;

begin
  // Try to open the Unit1.DCU file for the current project
  fileName := 'Unit1.DCU';
  fileDate := FileAge(fileName);

  // Did we get the file age OK?
  if fileDate > -1 then
    ShowMessage(fileName+' last modified date = '+
                DateToStr(FileDateToDateTime(fileDate)));
end;

Show full unit code

Unit1.DCU last modified date = 10/11/2002