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SelectedIndex always returning -1 for a ListView (ASP.NET 3.5 and VB.NET)

Posted on 2008-06-24
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Last Modified: 2013-11-26
Hello,

I have a listView with a select button, when I click on the select button the SelectedIndexChanged fires up but when I do ;

Dim i as integer
i = lvOffers.selectedIndex it always returns -1

any ideas why?
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Question by:htabbach
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4 Comments
 
LVL 8

Expert Comment

by:Chumad
ID: 21858143
Do you populate the listView in the page_load event? If so, you are probably losing the selection. In most cases, you only need to re-load the listView when page.IsPostback = false..

hope this helps :)
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Author Comment

by:htabbach
ID: 21858182
No, I populate the list from OnSelectedIndexChanged event of a DataGrid control, so it only populates if the user click on the select button of the DataGrid
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LVL 8

Accepted Solution

by:
Chumad earned 500 total points
ID: 21858222
My guess is that it's still being reset or re-populated somehow. If you put a break point into the very first line of your page_load event and check what SelectedIndex is (when it breaks after clicking the select button), do you still see -1 or does it have a value?
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Author Comment

by:htabbach
ID: 21858314
I debuged the app and it only populates once and still returns -1. Do I have to have a selectedItemtemplate for it to return the selectedindex?
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