Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Deleting files from a directory using wildcards in a C++ App.

Posted on 1998-07-10
7
Medium Priority
?
3,551 Views
Last Modified: 2013-11-19
I am writing a function in Visual C++ 5.0  that should delete files from a directory  that begins with a certain prefix.  A related DOS command would be "C:\> del myfiles.*".   I have used the function DeleteFile() to delete files where I know the exact name, such as "DeleteFile("c:\\archive\\myfiles.001")".  But if I substitute the wildcard character "*"
for ".001" it does not work.  Can this function accomplish this task?  If so, please provide an example.  If it can't, what would you recommend?

Thank you.

I think this should be an easy question to answer but if you need more points, feel free
to take what you feel it is worth.
0
Comment
Question by:asavino
[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
  • 3
  • 3
7 Comments
 

Author Comment

by:asavino
ID: 1319042
Edited text of question
0
 

Author Comment

by:asavino
ID: 1319043
Edited text of question
0
 
LVL 4

Accepted Solution

by:
piano_boxer earned 150 total points
ID: 1319044
DeleteFile() does not support wildcards. You need to Use FindFirstFile()/FindNextFile() instead.

I have written the following sample routine for you. Plz not that you can include the path in the filename (ex: WindDeleteFiles("c:\temp\*.*") which will delete all file in the temp dir.

void WildDeleteFiles(LPCTSTR lpszFile)
{
    WIN32_FIND_DATA fd;
    HANDLE hFind;

    hFind = FindFirstFile(s, &fd);
    if(hFind == INVALID_HANDLE_VALUE)
        // No files found
        return;

    do
    {
        DeleteFile(fd.cFileName);
    {
    while(FindNextFile(hFind, &fd));
}  

0
Survive A High-Traffic Event with Percona

Your application or website rely on your database to deliver information about products and services to your customers. You can’t afford to have your database lose performance, lose availability or become unresponsive – even for just a few minutes.

 
LVL 4

Expert Comment

by:piano_boxer
ID: 1319045
Sorry, s argument to FindFirstFile should be replaced by lpszFile.
0
 
LVL 3

Expert Comment

by:tma050898
ID: 1319046
PMFJI, the open curly before the while should be a closing brace
0
 
LVL 4

Expert Comment

by:piano_boxer
ID: 1319047
HERE IS THE CORRECTED ANSWER
****************************

DeleteFile() does not support wildcards.
You need to Use FindFirstFile()/FindNextFile() instead.

I have written the following sample routine for you.
Plz note that you can include the path in the filename
(ex: WildDeleteFiles("c:\temp\*.*") which will delete all
file in the temp dir.

void WildDeleteFiles(LPCTSTR lpszFile)
{
    WIN32_FIND_DATA fd;
    HANDLE hFind;

    hFind = FindFirstFile(lpszFile, &fd);
    if(hFind == INVALID_HANDLE_VALUE)
        // No files found
        return;

    do
    {
        DeleteFile(fd.cFileName);
    }
    while(FindNextFile(hFind, &fd));
    FindClose(hFind)  // <<<<<<<<<<<<<<<<
}
0
 

Author Comment

by:asavino
ID: 1319048
Thank you for your help, problem is solved. One note though, I found that the file name returned does not include the directory path name where the file was found.  But, it was no big deal.  All I did was re-append the path name to the file name returned and then issued the 'DeleteFile()'.  Thank you again.

0

Featured Post

Will your db performance match your db growth?

In Percona’s white paper “Performance at Scale: Keeping Your Database on Its Toes,” we take a high-level approach to what you need to think about when planning for database scalability.

Question has a verified solution.

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

Introduction: Dialogs (1) modal - maintaining the database. Continuing from the ninth article about sudoku.   You might have heard of modal and modeless dialogs.  Here with this Sudoku application will we use one of each type: a modal dialog …
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This tutorial will teach you the special effect of super speed similar to the fictional character Wally West aka "The Flash" After Shake : http://www.videocopilot.net/presets/after_shake/ All lightning effects with instructions : http://www.mediaf…
Suggested Courses

715 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