Working with exceptions...

[Guest]

Okay, so this borrowed code is for doing a recursive file search. The
problem is when I encounter the System Volume Information folder, a special
kind of exception is thrown that ends up terminating the subroutine. I have
two other exceptions that are thrown before the one I described does, yet
they don't terminate the subroutine.

Can anyone tell me why one kind of exception terminates this subroutine,
while another does not?



Sub FileSearch(ByVal sDir As String, ByVal FileName As String)
Dim Trigger As Integer = 0
Dim d2 As String
Dim f2 As String
If Trigger = 0 Then
Try
For Each d2 In Directory.GetDirectories(sDir)
For Each f2 In Directory.GetFiles(d2, FileName)
MsgBox(f2, MsgBoxStyle.Critical, "File Found")
Next
FileSearch(d2, FileName)
Next
Catch excpt As UnauthorizedAccessException
MsgBox(excpt.Message)
End Try
End If
'MsgBox("Done")
End Sub

 

[Tom Shelton]

Okay, so this borrowed code is for doing a recursive file search. The
problem is when I encounter the System Volume Information folder, a special
kind of exception is thrown that ends up terminating the subroutine. I have
two other exceptions that are thrown before the one I described does, yet
they don't terminate the subroutine.

Can anyone tell me why one kind of exception terminates this subroutine,
while another does not?

Sure, the code below is only setup to capture
UnauthorizedAccessException. Any other exception is going to be thrown
right out of the routine... What's the fix? Well, you can either add
another catch statement for the specific exception or you can modify
the code to trap all exceptions by changeing the catch block to read:

Catch excpt As Exception

I caution yout that this is in general not good practice, as it can
cause important exceptions to be ignored... But, it is a possible
solution.