Link to home
Start Free TrialLog in
Avatar of evansj
evansj

asked on

Getting path info.

How would you determine all directories on a hard drive and get a listing of them in your delphi app?
Avatar of PeterLarsen
PeterLarsen

In D5 there is a demo program called "Virtual Listview". I think this is what you'r looking for.
Delhpi 4 have a similar demo, but it is better in D5.

Regards
Peter
try this,

//scan directory tree and return a list of all files and directories
procedure ScanDirectory(Dir: String; var FileList: TStringList);

          procedure SearchTree;
          var
            sRec    : TSearchRec;
            RetCode : Integer;
            Dir     : String;
          begin
            GetDir(0, Dir);
            if Dir[length(Dir)] <> '\' then Dir := Dir + '\'; //add trailing slash
            //Go for the subdirectories
            RetCode := FindFirst('*.*', faDirectory, sRec);
            try
              while RetCode = 0 do
              begin
                if (SRec.Attr AND faDirectory = faDirectory) and (SRec.Name[1] <> '.') then {directories}
                begin
                  FileList.Add(Dir + SRec.Name);
                  ChDir(SRec.Name);
                  SearchTree; //time for recursion
                  ChDir('..'); //back up a level
                end;
                RetCode := FindNext(SRec);
              end;
            finally
              FindClose(SRec);
            end;
          end;

begin
  //Clear existing Files...
  FileList.Clear;

  //Change to start directory
  Chdir(Dir);

  //Start file list scan
  SearchTree;
end;


you will need to create the stringlist yourself:

procedure TForm1.Button1Click(Sender: TObject);
var
      list1: TStringlist;
  i: integer;
begin
  list1:= TStringlist.create;
  ScanDirectory('c:\program files',list1);
  for i:= 0 to list1.count - 1 do
        listbox1.items.add(list1[i]);

  list1.Free;
end;
or cheat :)

procedure TForm1.FormCreate(Sender: TObject);
begin
     shellExecute(handle,'open','c:\windows\command\command.com dir c:\*.* /s/b > c:\testdir.txt','','',SW_show);
     memo1.lines.loadFromFile('c:\testdir.txt');
     deleteFile('c:\testdir.txt');
end;



GL
Mike
howdy,

yeh..i normally do something like what edey has :) it makes life so much easier if you just shellexecute the command into a file...

you can always get the drive letter and home directory (if not root), by using a TDirectoryList and TFileList
Avatar of evansj

ASKER

Adjusted points to 200
Avatar of evansj

ASKER

Not only get the directory, but the files in the directory.
ASKER CERTIFIED SOLUTION
Avatar of aubs
aubs

Link to home
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
Start Free Trial
evansi,


i suppose it all depends if you want it done quick and dirty (edey's way) or the proper way to do it (aubs' way)

:)
Avatar of evansj

ASKER

To Aub: I'm having trouble implementing your code snippet. When I call the ScanDirectory proc like:
myList.create;
ScanDirectory('e:\',mylist);
I get an access violation at the filelist.clear part of your code. I am using Delphi 3.0 enterprise. What am I doing wrong, or where should I place the procedure?
evansi,

It sounds like you have not, prior to calling ScanDirectory, created the TStringList object to be passed in to the procedure.

Before calling ScanDirectory, do this:

mylist := TStringList.Create();

then call:

ScanDirectory('e:\', mylist);

Otherwise, aubs' code looks solid to me.

Happy Coding!

Jimbo