[Jay V.]

I tried to execute a code that will display Book Titles in alphabetical order within a list box
and received an ArgumentNullException (Value cannot be null. Parameter name: item) error.

  Dim strBook As String

        Array.Sort(_strBookTitle)

        For Each strBook In _strBookTitle
            Me.lstDisplay.Items.Add(strBook)
        Next 

This post has been edited by Jay V.: 24 February 2010 - 01:19 AM

[Luc001]

Hi,

The ArgumentNullException means that it can't find the file.
_strBookTitle what is it and where is it.

Here's an example how you can do it with a textfile:

Dim a As String = My.Computer.FileSystem.ReadAllText("path and nameoftextfile.txt")        
Dim b As String() = a.Split(vbNewLine)        
ListBox1.Items.AddRange(B)/>

This post has been edited by Luc001: 24 February 2010 - 03:13 AM

[remorseless]

Actually, I believe the error is that one of the book title is null or empty. If you want a quick work around for that then try this code

Dim strBook As String

Array.Sort(_strBookTitle)

For Each strBook In _strBookTitle
        'The book title is not null or empty'
        If Not String.IsNullOrEmpty(strBook) Then
                Me.lstDisplay.Items.Add(strBook)
        End If
Next

Try that and see what happens. Forgive me if it doesn't work, I haven't used VB.Net in a while. Hope I helped

This post has been edited by remorseless: 24 February 2010 - 02:36 AM