Solved

vb.net checking if file exists problem

Posted on 2011-03-03
4
995 Views
Last Modified: 2012-05-11
The following code in a windows service alway returns false:

        Dim f As New IO.FileInfo(sourceFolder)

        If f.Exists = 1 Then
            LogError("FILE EXISTS " & f.FullName)
        Else
            LogError("FILE DOES NOT EXIST " & f.FullName)
        End If

This is the value of f - - C:\FileExchange\Appointments\Pending


And it contains the file -- Text Document.txt

I won't always know the name of the text file, and there may be 1 or more. I need to check that there are files in the folder before I process them.

What wrong?

Andy
0
Comment
Question by:Andy Green
[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 52

Expert Comment

by:Carl Tawn
ID: 35024933
It's correct in returning false. You are passing the path of a directory and asking if it exists as a file, which it doesn't.

If you want to check for the existence of a file then you need to pass the path AND name of the file.
0
 
LVL 52

Assisted Solution

by:Carl Tawn
Carl Tawn earned 100 total points
ID: 35024943
If you want to check for existence of the directory, and to see if it contains any *.txt files you would use:
Dim di As New DirectoryInfo(sourceFolder)
If di.Exists = True Then
     If di.GetFiles("*.txt").Count > 0 Then
            '// folder exists and has files in it
     End If
End If

Open in new window

0
 
LVL 39

Accepted Solution

by:
Pratima Pharande earned 400 total points
ID: 35024953
Dim f As New IO.DirectoryInfo(sourceFolder)
       
        If f.GetFiles().Length > 0 Then
          LogError("FILE EXISTS " & f.FullName)
        Else
            LogError("FILE DOES NOT EXIST " & f.FullName)
        End If
0
 
LVL 3

Author Closing Comment

by:Andy Green
ID: 35025015
Thanks All

Andy
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
VB.Net - Not Sure if Multi-threading is What I Need 4 39
asp.net web application 3 44
Change to file doesn't show up 16 74
VB.Net creating Contact in Outlook 1 50
A quick way to get a menu to work on our website, is using the Menu control and assign it to a web.sitemap using SiteMapDataSource. Example of web.sitemap file: (CODE) Sample code to add to the page menu: (CODE) Running the application, we wi…
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
In an interesting question (https://www.experts-exchange.com/questions/29008360/) here at Experts Exchange, a member asked how to split a single image into multiple images. The primary usage for this is to place many photographs on a flatbed scanner…

756 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