How to get create/last modified dates of a file in Delphi? - windows

Question

I want to get a files these attributes as integer values.

Answer 1

Try
function FileAge(const FileName: string; out FileDateTime: TDateTime): Boolean;
From SysUtils.

Answer 2

Delphians tend to like the FindFirst approach (the SearchRec structure has some of those), but I'd suggest the Win32 API function GetFileAttributesEx.

Answer 3

From the DSiWin32 freeware library:
function DSiFileTimeToDateTime(fileTime: TFileTime; var dateTime: TDateTime): boolean;
var
sysTime: TSystemTime;
begin
Result := FileTimeToSystemTime(fileTime, sysTime);
if Result then
dateTime := SystemTimeToDateTime(sysTime);
end; { DSiFileTimeToDateTime }
function DSiGetFileTimes(const fileName: string; var creationTime, lastAccessTime,
lastModificationTime: TDateTime): boolean;
var
fileHandle : cardinal;
fsCreationTime : TFileTime;
fsLastAccessTime : TFileTime;
fsLastModificationTime: TFileTime;
begin
Result := false;
fileHandle := CreateFile(PChar(fileName), GENERIC_READ, FILE_SHARE_READ, nil,
OPEN_EXISTING, 0, 0);
if fileHandle <> INVALID_HANDLE_VALUE then try
Result :=
GetFileTime(fileHandle, #fsCreationTime, #fsLastAccessTime,
#fsLastModificationTime) and
DSiFileTimeToDateTime(fsCreationTime, creationTime) and
DSiFileTimeToDateTime(fsLastAccessTime, lastAccessTime) and
DSiFileTimeToDateTime(fsLastModificationTime, lastModificationTime);
finally
CloseHandle(fileHandle);
end;
end; { DSiGetFileTimes }

Answer 4

function GetFileModDate(filename : string) : TDateTime;
var
F : TSearchRec;
begin
FindFirst(filename,faAnyFile,F);
Result := F.TimeStamp;
//if you really wanted an Int, change the return type and use this line:
//Result := F.Time;
FindClose(F);
end;
F.Time has since been Deprecated, Help file says Use F.TimeStamp.
Just to update this due to later versions of Delphi

Answer 5

System.IOUtils do have a TFile record with several functions for getting file age, e.g. GetCreationTime, GetLastAccessTime, GetLastWriteTime

Answer 6

This should work, and it is native Delphi code.
function GetFileModDate(filename : string) : integer;
var
F : TSearchRec;
begin
FindFirst(filename,faAnyFile,F);
Result := F.Time;
//if you wanted a TDateTime, change the return type and use this line:
//Result := FileDateToDatetime(F.Time);
FindClose(F);
end;

Answer 7

You could call the GetFileInformationByHandle winapi function. Aparently JCL has a GetFileLastWrite function you could also use