ListView and DisplayIndex

[Ken]

I am adding items to a listview and I get an exception that seems to be
random.

"500 is not a valid value for displayindex"

I have searched the web looking for others with this problem and have found
a few. The problem is: I've found no real explanation/solution to the
problem - yet.

Someone has to know what this is - and how to handle it.

Is it a bug in vb.net?
Can it be swatted?

Thanks, Ken

[Armin Zingler]

Re: ListView and DisplayIndex

"Ken" <ks3ss@s32443t. com> schrieb[color=blue]
>I am adding items to a listview and I get an exception that seems to
> be
> random.
>
> "500 is not a valid value for displayindex"
>
> I have searched the web looking for others with this problem and have
> found a few. The problem is: I've found no real explanation/solution
> to the problem - yet.
>
> Someone has to know what this is - and how to handle it.
>
> Is it a bug in vb.net?
> Can it be swatted?[/color]

How many items are in the list? The index is 0-based. With 500 items, the
maximum index is 499.

Armin

[Ken]

Re: ListView and DisplayIndex

Yes. The number of items in the list is 500 when I get the count. However,
the max index is 499 since it is 0-based. This has been tested and is
accurate. The problem still remains

Ken

"Armin Zingler" <az.nospam@free net.de> wrote in message
news:eFoNDziWFH A.3996@TK2MSFTN GP09.phx.gbl...[color=blue]
> "Ken" <ks3ss@s32443t. com> schrieb[color=green]
> >I am adding items to a listview and I get an exception that seems to
> > be
> > random.
> >
> > "500 is not a valid value for displayindex"
> >
> > I have searched the web looking for others with this problem and have
> > found a few. The problem is: I've found no real explanation/solution
> > to the problem - yet.
> >
> > Someone has to know what this is - and how to handle it.
> >
> > Is it a bug in vb.net?
> > Can it be swatted?[/color]
>
> How many items are in the list? The index is 0-based. With 500 items, the
> maximum index is 499.
>
> Armin[/color]

[Herfried K. Wagner [MVP]]

Re: ListView and DisplayIndex

"Ken" <ks3ss@s32443t. com> schrieb:[color=blue]
> Yes. The number of items in the list is 500 when I get the count. However,
> the max index is 499 since it is 0-based. This has been tested and is
> accurate. The problem still remains[/color]

Please post relevant parts of the code.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Ken]

Re: ListView and DisplayIndex

I think you are talking about the code below. It is executed after each
addition to the listview.

If frmComm1.ListVi ew1.Items.Count > 500 Then
frmComm1.ListVi ew1.Items.Remov eAt(500)

I do not get the error every time 500 items are in the listview, the error
occurs randomly. The program could run for hours, even days before an error
occurs.

I found something here that seems to be the same type of problem.

http://service1.symantec.com/SUPPORT/powerquest.nsf/76b08a3dd4dc166e88256e970047cea9/51caa0e9822e270388256e93007c1af0?OpenDocument&prod=Drive%20Image&ver=7.x&src=sg&pcode=dimage&svy=&csm=no

Thanks for your help, this has been haunting me for a couple of months now.

Ken

"Herfried K. Wagner [MVP]" <hirf-spam-me-here@gmx.at> wrote in message
news:O9vNcCjWFH A.2572@TK2MSFTN GP14.phx.gbl...[color=blue]
> "Ken" <ks3ss@s32443t. com> schrieb:[color=green]
> > Yes. The number of items in the list is 500 when I get the count.[/color][/color]
However,[color=blue][color=green]
> > the max index is 499 since it is 0-based. This has been tested and is
> > accurate. The problem still remains[/color]
>
> Please post relevant parts of the code.
>
> --
> M S Herfried K. Wagner
> M V P <URL:http://dotnet.mvps.org/>
> V B <URL:http://classicvb.org/petition/>
>[/color]