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copy files in delphi

Posted on 1998-03-20
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Last Modified: 2010-04-06
Hi,
I want my users be to be able to make a backup of their data. Hence I have to write some code to copy all files in lets say c:\data to c:\data\backup. How can I best do this?
Thanks
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Question by:lizzzard
5 Comments
 
LVL 4

Expert Comment

by:BoRiS
ID: 1360652
lizzzard try this function....

but remember to add LZexpand to your uses clause...

function CopyFile(SrcF,DestF : string) : boolean;
var
  SFile,
  DFile : integer;
  Res   : longint;
  Msg   : string;

begin
  SFile := FileOpen(SrcF,0);        { Open ReadOnly = 0, Write=1, Readwrite=2}
  DFile := FileCreate(DestF);
  Res := LZCopy(SFile,DFile);
  FileClose(SFile);
  FileClose(DFile);
  if Res < 0 then
  begin
    Msg := 'Unknown error';
    case Res of
      LZERROR_BADINHANDLE   : Msg := 'Invalid Source file handle';
      LZERROR_BADOUTHANDLE  : Msg := 'Invalid Destination file handle';
      LZERROR_BADVALUE      : Msg := 'Input parameter is out of range';
      LZERROR_GLOBALLOC     : Msg := 'Insufficient memory for the required buffers';
      LZERROR_GLOBLOCK      : Msg := 'Internal data structure handle invalid';
      LZERROR_READ          : Msg := 'Source file format is not valid';
      LZERROR_UNKNOWNALG    : Msg := 'The Source file was compressed with an unrecognized compression algorithm';
      LZERROR_WRITE         : Msg := 'There is insufficient space for the output file';
    end;
    MessageDlg(Msg,mtERROR,[mbOK],0);
    result := FALSE
  end else
    result := TRUE;
end;

Later
BoRiS
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LVL 7

Expert Comment

by:ahalya
ID: 1360653
Why not do FindFirst, FindNext and call the WinAPI

copyFile(src, dst, FailIfExist) ?


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Author Comment

by:lizzzard
ID: 1360654
I can't use LZExpand
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LVL 3

Accepted Solution

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d4jaj1 earned 50 total points
ID: 1360655
There is a simple component caled uFileOps.  You can download it for Torry's site or post your email address here.  The component is free and allows you to do several file operations, including copying files very easily.  I use it my self and all I do to copy the files is write three lines of code -
Mask (eg *.db)
Loadfiles(false) - true adds teh full directory, false just teh files
Copyfiles - copies all of the files matching the mask above.

Pretty simple and comes with a help document.  If you need anymore answers from me, please post a comment here.  Good Luck!

Jay
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Author Comment

by:lizzzard
ID: 1360656
Thanks d4jaj1 (what a name)

my email-adress is alexg@molyvos.net or give me the URL.
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