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Directory & File Size

Posted on 2002-04-30
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Last Modified: 2010-04-04
Hi Experts

Two questions today
How would I be able to extract file name from a given path.
And anyone knows of code or a component that would calculate the size of a file or drive.

Thank you
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Comment
Question by:Hafez
4 Comments
 
LVL 5

Expert Comment

by:alanwhincup
ID: 6981838
Here you are:

1: ExtractFileName('C:\blahblah.txt);

2: Could be done like this:

procedure TForm1.Button1Click(Sender: TObject);
var
  SearchRec : TSearchRec;
begin
  FindFirst('C:\blahblah.blah', faAnyFile, SearchRec);
  if SearchRec.Size <> 0 then
    ShowMessage(Inttostr(SearchRec.Size));
end;

Or with the use of FileSizeByName in IdGlobal unit or you may be able to open the file in read-only mode with CreateFile() then get the size using GetFileSize().

3: Look at http://www.efg2.com/Lab/Library/Delphi/IO/D3DiskSpaceKludge.ZIP for disk size

Cheers,

Alan
0
 
LVL 34

Expert Comment

by:Slick812
ID: 6982579
here's a function I use for drive size


type
TdriveSize = record
    FreeS:Int64;
    TotalS:Int64;
end;


function DiskSpace(Drive: String): TdriveSize;
var
  TSpace,TotalS: Int64;
  Sizes:TdriveSize;
  ErrorMode: Word;
begin
Delete(Drive, 4, 600);
ErrorMode := SetErrorMode(SEM_FailCriticalErrors);
if GetDiskFreeSpaceEx(@Drive[1], TSpace, TotalS, nil) then
begin
Sizes.FreeS :=  TSpace;
Sizes.TotalS := TotalS;
Result := Sizes;
end else
begin
Sizes.FreeS := -1;
Sizes.TotalS := -1;
Result := Sizes;
end;
SetErrorMode(ErrorMode);
end;
0
 
LVL 6

Accepted Solution

by:
Stuart_Johnson earned 360 total points
ID: 6982677
Here's a bit of code I use to get the total size of a given directory and all it's sub directories.  I know you didn't ask for this, but I thought it maybe useful to know :)

function GetDirectorySize(Dir: String): Double;
var
  SR: TSearchRec;
  I: Integer;
begin
  Dir := IncludeTrailingBackSlash(Dir);

  I := FindFirst(Dir + '*.*', faAnyFile, SR);
  while I = 0 do
    begin
      if (SR.Name[1] <> '.') then //exclude '.' and '..' directories
        begin
          if (SR.Attr and faDirectory) = faDirectory then
            Result := Result + GetDirectorySize(Dir + SR.Name)  //calculate size of nested directory
          else
            Result := Result + SR.Size;
        end; {if Name <> '.'}
      I := FindNext(SR);
    end; {while I = 0}

  FindClose(SR);
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  ShowMessage(Format('Total Size of Directory is: %n bytes', [GetDirectorySize('D:\Programming')]));
end;
0
 

Author Comment

by:Hafez
ID: 6982811
Its exactlty what I was looking for , Thank you
0

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