Solved

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

Posted on 2008-06-24
4
494 Views
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?
0
Comment
Question by:htabbach
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
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 :)
0
 

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
0
 
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?
0
 

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?
0

Featured Post

Technology Partners: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
Problem Hi all,    While many today have fast Internet connection, there are many still who do not, or are connecting through devices with a slower connect, so light web pages and fast load times are still popular.    If your ASP.NET page …
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question