I've nearly completed the migration of my first ListBox control to a
ListView in detail view, and I'm only experiencing one problem:
My ListBox.Selecte dIndexChanged procedure began as follows:
NextPointID = ListBox_Points. SelectedIndex + 1
The equivalent of that command for a ListView would seem to be:
NextPointID = ListView_Points .SelectedIndice s(0) + 1
Since my ListView doesn't allow multiselect, the first (0th) SelectedIndex
in the collection would always be the only member, correct?
A single execution of that line of code works perfectly, but if I attempt
to choose another index, it returns the following error:
---
An unhandled exception of type 'System.Argumen tOutOfRangeExce ption'
occurred in system.windows. forms.dll
Additional information: Specified argument was out of the range of valid
values.
---
So, what's the sitch? What'd I do wrong?
Thanks in advance for any assistance,
The Confessor 4 1540
You said the answer yourself - you don't allow multi-select, so you
can't use a different index.
Tom
The Confessor wrote: I've nearly completed the migration of my first ListBox control to a ListView in detail view, and I'm only experiencing one problem:
My ListBox.Selecte dIndexChanged procedure began as follows:
NextPointID = ListBox_Points. SelectedIndex + 1
The equivalent of that command for a ListView would seem to be:
NextPointID = ListView_Points .SelectedIndice s(0) + 1
Since my ListView doesn't allow multiselect, the first (0th) SelectedIndex in the collection would always be the only member, correct?
A single execution of that line of code works perfectly, but if I attempt to choose another index, it returns the following error:
---
An unhandled exception of type 'System.Argumen tOutOfRangeExce ption' occurred in system.windows. forms.dll
Additional information: Specified argument was out of the range of valid values.
---
So, what's the sitch? What'd I do wrong?
Thanks in advance for any assistance,
The Confessor
tomb <to**@technetce nter.com> wrote in
news:v8******** ***********@big news5.bellsouth .net: You said the answer yourself - you don't allow multi-select, so you can't use a different index.
Tom
Are you certain you understood the question I was asking? I've
intentionally set MultiSelect to false.
What I want is a way to pass the index of the sole selected item + 1 to the
NextPointID variable.
My current code will do this only once, crashing *on that line* on the
second iteration.
"The Confessor" <in*****@reply. to.group> schrieb I've nearly completed the migration of my first ListBox control to a ListView in detail view, and I'm only experiencing one problem:
My ListBox.Selecte dIndexChanged procedure began as follows:
NextPointID = ListBox_Points. SelectedIndex + 1
The equivalent of that command for a ListView would seem to be:
NextPointID = ListView_Points .SelectedIndice s(0) + 1
Since my ListView doesn't allow multiselect, the first (0th) SelectedIndex in the collection would always be the only member, correct?
A single execution of that line of code works perfectly, but if I attempt to choose another index, it returns the following error:
---
An unhandled exception of type 'System.Argumen tOutOfRangeExce ption' occurred in system.windows. forms.dll
Additional information: Specified argument was out of the range of valid values.
---
So, what's the sitch? What'd I do wrong?
Add this as the first line in SelectedIndexCh anged:
if listbox_points. selectedindices .count = 0 then return
Reason: If you select another item, the previous item is un-selected and
SelectedIndexCh anged is raised. Count = 0 in this case.
Armin
"Armin Zingler" <az*******@free net.de> wrote in news:O75zwxGGGH A.2300
@TK2MSFTNGP15.p hx.gbl: Add this as the first line in SelectedIndexCh anged:
if listbox_points. selectedindices .count = 0 then return
Reason: If you select another item, the previous item is un-selected and SelectedIndexCh anged is raised. Count = 0 in this case.
Armin
!
Took me a few minutes to see what you were saying:
Whereas selecting a different ListBox entry raises the SelectedIndexCh anged
event only once, selecting a different ListView entry raises it twice. Once
for the de-selection of the previous index, and one for the selection of
the new.
This requires a bail-out statement in case of the former prior to any tests
of SelectedIndice content.
A hellishly devious change.
I am in your debt, Armin.
The Confessor This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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