System.IO Directory - Xtreme Visual Basic Talk

01-23-2004, 06:48 AM

byon

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Join Date: Aug 2003

Location: Singapore

Posts: 21

System.IO Directory

Hi

I'm new to vb.net and i just read up on system.io namespace, directory. my mind just generated an idea on creating a application that 'Create', 'Delete', 'Refresh' Directories. but currently my listbox1 is giving me errors...
Argument not specified for parameter 'item' of 'public function....

i inserted the following code into a button/form both generated the same error message.

Code:

Dim str() As String, intx As Integer
        str = Directory.GetLogicalDrives
        For intx = 1 To UBound(str)
            ListBox1.Items.Add = str(intx)
        Next

thanks in advance.

01-23-2004, 07:48 AM

AFterlife

Contributor

Join Date: Dec 2003

Location: Mi

Posts: 654

TRY THIS:

Code:

Dim str As String(), intx As Integer, i As Integer
        str = Directory.GetLogicalDrives
        intx = Directory.GetLogicalDrives.Length - 1
        For i = 0 To intx
            ListBox1.Items.Add(str(i))
        Next

Last edited by Wamphyri; 01-23-2004 at 08:24 AM. Reason: erased quote of previous post

01-23-2004, 11:22 AM

Csharp

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* Expert *

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Location: Ashby, Leicestershire.

Posts: 967

you dont need to loop through the drive letters though

in one easy line ...

Code:

ListBox1.Items.AddRange(IO.Directory.GetLogicalDrives)
'/// add the array of drive letters in one go.

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01-23-2004, 12:38 PM

byon

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Join Date: Aug 2003

Location: Singapore

Posts: 21

Thanks!
can i know why it doesn't work?

i had a friend who prefers using UBound(Arry) over Arry.Length - 1

but why?

01-23-2004, 12:42 PM

byon

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Join Date: Aug 2003

Location: Singapore

Posts: 21

THis one is really nifty...
woo!
thanks!

01-23-2004, 01:42 PM

Iceplug

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Posts: 16,583

Since you are using .NET, use the array's .GetUpperBound() method to get the UBound instead.

And i.ToString() instead of the str() function, which is outdated even in Legacy VB.

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01-23-2004, 08:25 PM

AFterlife

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Location: Mi

Posts: 654

Cool. Ill remember that addrange one.

01-24-2004, 03:51 AM

byon

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Join Date: Aug 2003

Location: Singapore

Posts: 21

Quote:
Originally Posted by Iceplug
Since you are using .NET, use the array's .GetUpperBound() method to get the UBound instead.
And i.ToString() instead of the str() function, which is outdated even in Legacy VB.

a reply to the above...
How do i use Str() Function in the following code?

Code:

Dim str As String(), intx As Integer, i As Integer
        str = Directory.GetLogicalDrives
        intx = Directory.GetLogicalDrives.Length - 1
        For i = 0 To intx
            ListBox1.Items.Add(str(i))
        Next

i tried changing to

Code:

ListBox1.Items.Add(i.ToString(str))

but it does not work

01-24-2004, 05:01 AM

Csharp

Senior Contributor

* Expert *

Join Date: Jul 2003

Location: Ashby, Leicestershire.

Posts: 967

firstly you shouldnt declare a string with the name Str , as Str is a function.
if you wish to add each item through a loop, do either of these ...

Code:

Dim drives As String() = IO.Directory.GetLogicalDrives
        Dim x As Integer

        For x = drives.GetLowerBound(0) To drives.GetUpperBound(0)
            ListBox1.Items.Add(drives(x))
        Next

or ..

Code:

Dim drives As String() = IO.Directory.GetLogicalDrives
        Dim drive As String
        For Each drive In drives
            ListBox1.Items.Add(drive)
        Next

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