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error when trying to get information out of listview box

Posted on 2007-11-22
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Last Modified: 2010-04-23
First part of the code is where i get my error:

Argument out of range exception was unhandled - Invalid argument value=0 is invalid for a index

This is very weird, since i have used the same code several other places without no problem.

Il post the code for the listview. (i have values in this listview too, so there should be values to get out)
private sub button click
 
Me.listviewordre.Clear()
        Dim ordrenr As String = Me.listviewordre.SelectedItems(0).Text  <------- ERROR LINE
        MsgBox(ordrenr)
        Exit Sub
 
 
        Me.kjorInsert("DELETE Ordreinfo WHERE ordre_nr = " & ordrenr)
 
        Me.kjorInsert("DELETE Ordre WHERE ordre_nr = " & ordrenr)
 
        Call Me.Oppdaterlistviewordre()
 
end sub
 
 
------------------------------------------------------------------------------------------
 
 
Listview code:
 
Me.listviewordre.Clear()
        Dim forbindelse1 As New System.Data.OracleClient.OracleConnection
 
        forbindelse1.ConnectionString = "user id=****;password=***;data source=***"
        forbindelse1.Open()
 
        Dim kommando As New System.Data.OracleClient.OracleCommand("SELECT o.ordre_nr, oi.vare_nr, oi.vare_antall, oi.salgs_dato, oi.knd_nr, v.vare_navn, v.vare_type, v.vare_pris, k.knd_fornavn, k.knd_etternavn, k.knd_adresse, k.post_nr, s.poststed, oi.ans_nr, o.fullført FROM Ordre o, Ordreinfo oi, Vare v, Kunde k, Sted s WHERE oi.ordre_nr = o.ordre_nr AND oi.vare_nr = v.vare_nr AND k.knd_nr = oi.knd_nr AND s.post_nr = k.post_nr AND o.fullført = 'nei'", forbindelse1)
        Dim dataleser As OracleClient.OracleDataReader
        dataleser = kommando.ExecuteReader()
 
        With Me.listviewordre
            .GridLines = True
            .MultiSelect = False
            .FullRowSelect = True
            .View = View.Details
            .HideSelection = False
            .Columns.Add("O. nr", 35, HorizontalAlignment.Center)
            .Columns.Add("V. nr", 35, HorizontalAlignment.Center)
            .Columns.Add("Ant.", 35, HorizontalAlignment.Center)
            .Columns.Add("Salgsdato", 68, HorizontalAlignment.Center)
            '.Columns.Add("Kundenr", 45, HorizontalAlignment.Center)
            .Columns.Add("Varenavn", 111, HorizontalAlignment.Center)
            '.Columns.Add("Varetype", 65, HorizontalAlignment.Center)
            .Columns.Add("Pris", 50, HorizontalAlignment.Center)
            .Columns.Add("Kundenavn", 100, HorizontalAlignment.Center)
            .Columns.Add("Adresse", 185, HorizontalAlignment.Center)
            '.Columns.Add("Postnummer", 65, HorizontalAlignment.Center)
            '.Columns.Add("Poststed", 65, HorizontalAlignment.Center)
            .Columns.Add("Ansatt", 45, HorizontalAlignment.Center)
            '.Columns.Add("Fullført", 55, HorizontalAlignment.Center)
 
 
 
        End With
 
        Dim lstItem As ListViewItem
        While dataleser.Read()
            lstItem = New ListViewItem()
            lstItem.Text = dataleser.GetInt32(0)
            lstItem.SubItems.Add(dataleser.GetInt32(1))
            lstItem.SubItems.Add(dataleser.GetInt32(2))
            lstItem.SubItems.Add(dataleser.GetOracleDateTime(3))
            'lstItem.SubItems.Add(dataleser.GetInt32(4))
            lstItem.SubItems.Add(dataleser.GetString(5))
            'lstItem.SubItems.Add(dataleser.GetString(6))
            lstItem.SubItems.Add(dataleser.GetInt32(7))
            lstItem.SubItems.Add(dataleser.GetString(8) & " " & dataleser.GetString(9))
            lstItem.SubItems.Add(dataleser.GetString(10) & " " & dataleser.GetString(11) & " " & dataleser.GetString(12))
            'lstItem.SubItems.Add(dataleser.GetString(11))
            'lstItem.SubItems.Add(dataleser.GetString(12))
            lstItem.SubItems.Add(dataleser.GetInt32(13))
            'lstItem.SubItems.Add(dataleser.GetString(14))
 
            Me.listviewordre.Items.Add(lstItem)
 
 
        End While
 
        dataleser.Close()
        forbindelse1.Close()

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Question by:leeds2000
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LVL 38

Accepted Solution

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PaulHews earned 500 total points
ID: 20336290
When you call
Me.listviewordre.Clear()

You are clearing the listview, so there are no items to select.
0
 
LVL 55

Expert Comment

by:Jaime Olivares
ID: 20336305
I guess you need something like this:
 
if Me.listviewordre.SelectedItems.Count > 0 Then
        Dim ordrenr As String = Me.listviewordre.SelectedItems(0).Text  <------- ERROR LINE
        MsgBox(ordrenr)
else
        MsgBox("List is empty")
end if

Me.listviewordre.Clear()
 
 
 
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LVL 3

Author Comment

by:leeds2000
ID: 20336323
i have the same code on another listview, there it works perfectly, the clear listview is after the selected item, and i DO select a value then press the button, this would make it have a value before the clear listview right?

Il try and insert the IF sentence, but i dont think it would solve my problem.

I know it has values before the listview gets cleared, i just dont understand :/
0
 
LVL 3

Author Comment

by:leeds2000
ID: 20336342
OHHHHHHHHHHHHHH

yes i see now, i have a listview.clear on top of my button!! this was not suppose to be there :D

THANKS :)
0
 
LVL 38

Expert Comment

by:PaulHews
ID: 20336470
Hey, I've had days like that too.  :)  Glad you got it working.
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