Correct This Error-"InvalidArgument=Value of '0' is not valid for 'index'. Parameter name: index"

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VB

Private Sub lvdisplay_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles lvdisplay.SelectedIndexChanged
       Dim sno As String
       TripSheet.Show()
       TripSheet.MdiParent = Home
       sno = lvdisplay.SelectedItems(0).SubItems(0).Text
       TripSheet.cb_Sno.Text = sno
       Call TripSheet.display()
       TripSheet.cb_Sno.Focus()
   End Sub

I used this code for select the item from the list view and display the corresponding records in the form.

First i choose the item from the list view means it displays correctly... Next i choose another item from the list view means i got this error...

Give idea to rectify this..................................

Posted 7-Jun-12 18:19pm

PunithaSabareeswari

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Sandeep Mewara 8-Jun-12 2:26am

Which line? What you say is little difficult to follow, yet check for list or combobox value assignement wherever you have done.

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Bernhard Hiller · Accepted Answer · 2012-06-07T20:25:00

As usual: changing the selection causes TWO (in numbers: 2) SelectedIndexChanged events. The first event is fired when the old selection was undone, and no item is selected - lvdisplay.SelectedItems does not contain any elements at this moment, and lvdisplay.SelectedItems(0) does not exist! The second event is fired when the new item is selected.
Your error occurs because your code is executed with the first event, whilst you assume you are at the second event.
Simply check:
if (lvdisplay.SelectedItems.Count > 0)