Solved

Delete *.* - Simple Question

Posted on 1999-01-09
4
210 Views
Last Modified: 2010-04-06
DeleteFile function deletes a specific file in at a given address.

What command or procedure could I use to delete all the files in a specific directory. i.e. Dos del*.*
0
Comment
Question by:smithsj1
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 20

Expert Comment

by:Madshi
ID: 1355501
Hmmm. With subdirectories or without?
You could either write a simple recursive loop with FindFirstFile, FindNextFile, FindClose. Then delete all files with DeleteFile (perhaps calling SetFileAttributes to disable write protection) and RemoveDirectory.
Or you could call a DOS command in hidden state (I could give you some sources for that).

Regards, Madshi.
0
 
LVL 1

Accepted Solution

by:
adeng earned 30 total points
ID: 1355502
1. Make a Form with Edit Box for directory name.

procedure TForm1.Button1Click(Sender: TObject);
var
     SearchRec: TSearchRec;
     I, M     : Integer;
begin
          M := FindFirst(Edit1.Text + '\*.*', 0, SearchRec);
          while M = 0 do
          begin
               DeleteFile(SearchRec.name);
               M := FindNext(SearchRec);
          end;
end;

Adeng
0
 
LVL 1

Expert Comment

by:adeng
ID: 1355503
Found on Delphi Help


Unit

SysUtils

Category

File management routines
FindFirst searches for the first instance of a file name with a given set of attributes in a specified directory.

function FindFirst(const Path: string; Attr: Integer; var F: TSearchRec): Integer;

Description

FindFirst searches the directory specified by Path for the first file that matches the file name implied by Path and the attributes specified by the Attr parameter. The result is returned in the F parameter. Use the fields of this search record to extract the information needed. FileFirst returns 0 if a file was successfully located, otherwise, it returns a Windows error code.
The Path constant parameter is the directory and file name mask, including wildcard characters. For example, 'c:\test\*.*' specifies all files in the C:\TEST directory).

The Attr parameter specifies the special files to include in addition to all normal files. Choose from these file attribute constants when specifying the Attr parameter:

Constant      Value      Description
faReadOnly      $00000001      Read-only files
faHidden      $00000002      Hidden files
faSysFile      $00000004      System files
faVolumeID      $00000008      Volume ID files
faDirectory      $00000010      Directory files
faArchive      $00000020      Archive files
faAnyFile      $0000003F      Any file
Attributes can be combined by adding their constants or values. For example, to search for read-only and hidden files in addition to normal files, pass (faReadOnly + faHidden) the Attr parameter.

Note

The FindFirst function allocates resources (memory) which must be released by calling FindClose.

Example

FindFirst is typically used in conjunction with FindNext and FindClose as follows, where ProcessSearchRec represents user-defined code that processes the information in a search record:

begin

    Found := FindFirst(Path, Attr, SearchRec);
    while Found = 0 do
    begin
      ProcessSearchRec(SearchRec);
      Found := FindNext(SearchRec);
    end;
    FindClose(SearchRec);
end;
0
 

Author Comment

by:smithsj1
ID: 1355504
Madshi

What i've got is a database program which when opened creates about 10 temp.db tables in c:\temp\analysis.

What I want to do is simply delete all the files in the c:\temp\analysis folder when the form is closed. There is not need to remove the directory.

Tables are created with table1.createtable so no attributes are attached.
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Introduction I have seen many questions in this Delphi topic area where queries in threads are needed or suggested. I know bumped into a similar need. This article will address some of the concepts when dealing with a multithreaded delphi database…
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…

707 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question