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Tip of the Day
Language: Visual Basic
Expertise: Beginner
Jul 24, 1997



Application Security Testing: An Integral Part of DevOps

Checking for File Existance

How do you use VB to check to see if a file exists?

The simplest way to do it is to try opening the file with these lines of code:

Open "filename.ext" For Input as #1
Close #1
You also want to add an error trap immediately before the Open statement so that you can catch the errors when they occur when the file does not exist. You'll have to look up the error number for "File not found" -- I think it's 53. The whole piece of code looks like this:
On Error Resume Next
Open "Filename.Ext" For Input As #1
If Err.Number = 53 Then
   ' Process error here
   Close #1
End If
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