Solved

Databound Listbox - Item Selection Problem

Posted on 2014-02-17
6
764 Views
Last Modified: 2014-02-17
I have a winform with a listbox databound to a single column (EmailName) of an Access table via a tableadapter. The listbox SelectionMode is set to MultiSimple and the ValueMember is set to "EmailName". The listbox fills correctly and I have coded (lboxEmailName.ClearSelected()) so no items are selected on form load .

The problem - When I select an item that is not the first item on the list, the first item changes to the item selected.

For example: There are three names in the listbox in the following order; Moe, Larry, Curly. If I select Larry, then first name on the list (Moe), changes to Larry. Also, I can't deselect the first name on the list as long as another name is selected.

I have no experience with listboxes, I just need to have a listbox that will allow the user to make a single or multiple selection from a short list of names.

Can someone help?
0
Comment
Question by:Tim313
[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
  • 3
  • 3
6 Comments
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 39864948
Do you mean you have two rows showing Larry ?

eg.
Larry
Larry
Curly
0
 

Author Comment

by:Tim313
ID: 39864953
That's correct...
0
 
LVL 44

Accepted Solution

by:
AndyAinscow earned 500 total points
ID: 39864986
This almost sounds like it is updating (modifying) the underlying data source to the list box.
Do you have any code responding to events raised by the listbox ?
0
More Than Just A Video Library

Train for your certification. Learn the latest DevOps tools. Grow your skillset to do better work.

At Linux Academy, we release new training modules every week so you'll always be up to date on the latest tech.

 

Author Comment

by:Tim313
ID: 39865054
No events raised by the listbox. Once the form loads, no code runs until a button (btnSend) is clicked. The changes (Moe, Larry, Curly to Larry, Larry, Curly) due to user selection occurs before the button click.
0
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 39865090
Hmmm, I don't immediately see what is going wrong.
0
 

Author Comment

by:Tim313
ID: 39865165
I found the problem, actually your "updating (modifying) the underlying data source" comment sent me to look at the Properties;(DataBindings);SelectedValue... I had that set to my tableadapter bindingsource AND the DataSource Property set to my tableadapter binding source along with the DisplayMember set to EmailName.

I cleared the Properties;(DataBindings);SelectedValue and left the DataSouce and DisplayMember as is and this seems to have cleared the conflict.

Too many late nights at the keyboard...

Thanks for you help!
0

Featured Post

Tutorials alone can't teach real engineering

So we built better training tools.

-Hands-on Labs
-Instructor Mentoring
-Scenario-Based Tests
-Dedicated Cloud Servers

All at your fingertips. What are you waiting for?

Question has a verified solution.

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

Wouldn’t it be nice if you could test whether an element is contained in an array by using a Contains method just like the one available on List objects? Wouldn’t it be good if you could write code like this? (CODE) In .NET 3.5, this is possible…
Today I had a very interesting conundrum that had to get solved quickly. Needless to say, it wasn't resolved quickly because when we needed it we were very rushed, but as soon as the conference call was over and I took a step back I saw the correct …
In this video, viewers are given an introduction to using the Windows 10 Snipping Tool, how to quickly locate it when it's needed and also how make it always available with a single click of a mouse button, by pinning it to the Desktop Task Bar. Int…
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …

726 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