How do I find the number of files in a drive in Visual Basic 2008+ ?

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How can I detect the number of temporary files in the hard drive in Visual Basic? I'm using this code, and it's not working:

VB

Dim drive As String = Path.GetPathRoot(System.Environment.ExpandEnvironmentVariables("%SystemDrive%"))

Dim counter3 As System.Collections.ObjectModel.ReadOnlyCollection(Of String)
counter3 = My.Computer.FileSystem.GetFiles(drive, FileIO.SearchOption.SearchAllSubDirectories, "*.tmp")
label1.text = (CStr(counter3.Count))

Posted 7-Jul-10 11:45am

drummerboy0511

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Kythen 7-Jul-10 17:56pm

How is it not working? What result are you getting and what are you expecting to see?

drummerboy0511 7-Jul-10 17:58pm

It's giving me "0" and I'm expecting to see the total number of temporary files from my hard drive. And I know for a fact (by looking in my various folders) that there are more than 0 files with the "*.tmp" extension.

4 solutions

Solution 1

When I test your code I find it searching the directory my executable is in; not the system root.

I get valid results if I change this line...

counter3 = My.Computer.FileSystem.GetFiles(drive, FileIO.SearchOption.SearchAllSubDirectories, "*.tmp")

To this...

counter3 = My.Computer.FileSystem.GetFiles(My.Computer.FileSystem.SpecialDirectories.Temp, FileIO.SearchOption.SearchAllSubDirectories, "*.tmp")

Posted 7-Jul-10 12:44pm

idenizeni

Comments

drummerboy0511 8-Jul-10 9:21am

See, that's the thing, I don't want it to search just that folder. I want it to search the whole drive.

And, for those worried about lag issues, I'm going to do it asynchronously.

idenizeni 8-Jul-10 11:03am

I understand, I was just posting that code to help show where the issue might be.

drummerboy0511 8-Jul-10 11:56am

Reason for my vote of 1
Not what I was looking for...

Solution 2

Have you stepped through the code ? Did you expect GetFiles to search subdirectories ? It does not. You need to write a recursive function for that.

Posted 7-Jul-10 12:44pm

Christian Graus

Comments

drummerboy0511 8-Jul-10 9:38am

Get files DOES search subdirectories, with the code that I put in.

drummerboy0511 8-Jul-10 11:56am

i have personally used it many times, successfully.

drummerboy0511 8-Jul-10 16:43pm

Reason for my vote of 1
...

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alrosan · Accepted Answer · 2010-07-07T20:14:00

Module Module1
    Dim cnt As Integer
    Sub Main()
        cnt = 0
        Console.WriteLine(CountFiles())
        Console.Read()
    End Sub
    Function CountFiles(Optional ByVal dri As String = "C:\", Optional ByVal subDir As Boolean = True) As Integer
        On Error Resume Next
        For Each fo As String In System.IO.Directory.GetDirectories(dri)
            If subDir Then
                CountFiles(fo, True)
            End If
        Next
        For Each fi As String In System.IO.Directory.GetFiles(dri)
            cnt += 1
        Next
        Return cnt
    End Function
End Module

idenizeni · Accepted Answer · 2010-07-08T06:11:00

Solution 4

Ok, I found your solution, your drive string contains 'C:' you need to append the '\' to it.

VB

Dim drive As String = Path.GetPathRoot(System.Environment.ExpandEnvironmentVariables("%SystemDrive%")) & "\"
Dim counter3 As System.Collections.ObjectModel.ReadOnlyCollection(Of String)
counter3 = My.Computer.FileSystem.GetFiles(drive, FileIO.SearchOption.SearchAllSubDirectories, "*.tmp")
Label1.Text = (CStr(counter3.Count))

Posted 8-Jul-10 6:11am

idenizeni

Comments

William Winner 8-Jul-10 12:30pm

Actually, it works just fine without it. When I ran the code as the person had it, I ended up with an accessibility issue. It crapped out after like 5 minutes saying that a folder was inaccessible. So, at least for me, there was a security issue.

But, I just tried
Dim counter3 As System.Collections.ObjectModel.ReadOnlyCollection(Of String)
counter3 = My.Computer.FileSystem.GetFiles("C:", FileIO.SearchOption.SearchTopLevelOnly, "*.shp")

MessageBox.Show(counter3.Count)

and it worked fine for me.

idenizeni 8-Jul-10 12:40pm

Interesting, when I run the poster's version I end up searching the directory my project's exe is in. When I add the slash at the end I search the 'C:' directory. I'm using XP what OS are you using?

I too ran into a permission issue when it tried to access certain directories.

drummerboy0511 8-Jul-10 13:55pm

RLH68 - I'm using XP too... with the permission issues, run the app as an administrator. That's the best I can come up with there. What version are you using, William Winner?

drummerboy0511 8-Jul-10 13:56pm

I do have a piece of code where I can detect the operating system (XP, Vista, or 7) and then run a different piece of code for each system. Perhaps I can use that in this case.

idenizeni 8-Jul-10 14:20pm

Just append the slash to your drive variable. I don't think you need to worry about the OS. I only asked about the OS becuase I thought it may explain why William Winner had different results than me.

Again, with the slash appended I get the correct results everytime, without the slash appened the process ends up searching the current application's dirrectory and not the C: drive.

drummerboy0511 8-Jul-10 16:42pm

All right, @RLH68, I will look into it when I get to the development computer...

How do I find the number of files in a drive in Visual Basic 2008+ ?

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