Listviewitem with multiple subitems?

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hello

I'm making a webbrowser but i want to add history and downloads
and their data is in a listbox
so the listview for the downloads contains the filename as a listviewitem and the date and url as subitems and the history listview contains the document title as listviewitem and url and date as subitems

i tried to manage that with this code

VB

If My.Settings.Downloads IsNot Nothing Then
    For Each downloaditm As String In My.Settings.Downloads
        If Not String.IsNullOrWhiteSpace(downloaditm) Then
            Dim downloaditm_Array() As String = downloaditm.Split("|"c)
            Dim listViewItem As New ListViewItem(downloaditm_Array(0))
            listViewItem.SubItems.Add(downloaditm_Array(1))
            listViewItem.SubItems.Add(downloaditm_Array(2))
            ListView1.Items.Add(listViewItem)
        End If
    Next
Else
    My.Settings.Downloads = New Specialized.StringCollection
End If

If My.Settings.History IsNot Nothing Then
    For Each hisitm As String In My.Settings.History
        If Not String.IsNullOrWhiteSpace(hisitm) Then
            Dim hisitm_Array() As String = hisitm.Split("|"c)
            Dim listViewItem As New ListViewItem(hisitm_Array(0))
            listViewItem.SubItems.Add(hisitm_Array(1))
            listViewItem.SubItems.Add(hisitm_Array(2))
            ListView2.Items.Add(listViewItem)
        End If
    Next
Else
    My.Settings.History = New Specialized.StringCollection
End If

which is in the load event of my form but i gives me an index out of range exeption

but the one when i downloaded something or visited a link it works fine

code:

VB

'History
Dim newItem As New ListViewItem(DirectCast(sender, WebKitBrowser).DocumentTitle)
newItem.SubItems.Add(DirectCast(sender, WebKitBrowser).Url.ToString)
newItem.SubItems.Add(DateAndTime.Now)
ListView2.Items.Add(newItem)
My.Settings.Downloads.Add(DirectCast(sender, WebKitBrowser).DocumentTitle + "|" + e.Url.ToString + "|" + DateAndTime.Now)
My.Settings.Save()

'Downloads
Dim newItem As New ListViewItem(e.SuggestedFileName)
newItem.SubItems.Add(e.Url.ToString)
newItem.SubItems.Add(DateAndTime.Now)
ListView1.Items.Add(newItem)
My.Settings.Downloads.Add(e.SuggestedFileName + "|" + e.Url.ToString + "|" + DateAndTime.Now)
My.Settings.Save()

so do you have any idea how i can fix this problem

Posted 20-Feb-13 5:54am

Bart de Lange

Updated 20-Feb-13 7:47am

Mike Meinz

v3

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Comments

Richard MacCutchan 20-Feb-13 13:29pm

You need to use your debugger to step through the code and check why the index is not valid.

Bart de Lange 20-Feb-13 13:38pm

this line
listViewItem.SubItems.Add(hisitm_Array(2))
but if i replace it with this
listViewItem.SubItems.Add("hello CodeProject")
it works just fine

Mike Meinz 20-Feb-13 13:40pm

Please use the Visual Studio Debugger to step through the code and let us know the line of code that gets the error and the values of the pertinent variables.

My guess is that either downloaditm or hisitm does not contain three tokens to be split into the associated array. Your code does not check the length of the associated array after the Split.

Bart de Lange 20-Feb-13 13:49pm

ive added an example string which is: Google|www.google.com|20-2-2013 19:30:40
so it does contain the right characters

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Mike Meinz · Answer 1 · 2013-02-20T07:35:00

I suggest that you wrap the Form Load Event code in an If Not Me.DesignMode block so that it will only get executed when you are running the program.

Suggested Change

Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not Me.DesignMode then 

    ... Form Load Event code goes here ...

End If
End Sub