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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

        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))
                End If
            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))
                End If
            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

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

so do you have any idea how i can fix this problem
Posted 20-Feb-13 5:54am
Updated 20-Feb-13 7:47am
Mike Meinz26.7K
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
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||20-2-2013 19:30:40
so it does contain the right characters

1 solution

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Solution 1

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

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