Solved

Selected Index Changed fires twice?

Posted on 2006-11-06
3
304 Views
Last Modified: 2008-03-04
Is it true that Selected Index Changed event ACTUALLY fires twice, once when you leave the row you are on, and once when you "highlight" the new row (the new row receives the focus) ?
0
Comment
Question by:knowlton
  • 2
3 Comments
 
LVL 17

Accepted Solution

by:
ZeonFlash earned 500 total points
ID: 17882426
What control are you referring to?  

I would rather seriously doubt that it does, in any case.  The change event is a single occurrence, much like a light bulb.  When you hit the switch, the bulb CHANGES from Off to On...it doesn't register a state of "in between".  So when, for example, a combobox has a selected index change, it's a single event going from Index A to Index B.  It doesn't go from Index A to Index NULL, then again from Index NULL to Index B.
0
 
LVL 5

Author Comment

by:knowlton
ID: 17894090
What about ListViews?
0
 
LVL 17

Expert Comment

by:ZeonFlash
ID: 17895392
For ListBoxes, the behavior is the same, and is extended by the SelectionMode:

One - SelectedIndexChanged is fire everytime an item is clicked.
MultiSimple - Fired everytime an item is selected OR de-selected.
MultiExtended - Fired everytime an individual item is clicked (selected or de-selected), but when holding the shift key and clicking, the event only fires once (even though multiple items may have been highlighted)
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Gridview selected row 9 49
Set value of dynamically created checkboxlist 2 42
Adding Existing Item to vb.net Project causes Errors 4 43
vb.net class 3 21
If you're writing a .NET application to connect to an Access .mdb database and use pre-existing queries that require parameters, you've come to the right place! Let's say the pre-existing query(qryCust) in Access takes a Date as a parameter and l…
Introduction As chip makers focus on adding processor cores over increasing clock speed, developers need to utilize the features of modern CPUs.  One of the ways we can do this is by implementing parallel algorithms in our software.   One recent…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…
In a recent question (https://www.experts-exchange.com/questions/29004105/Run-AutoHotkey-script-directly-from-Notepad.html) here at Experts Exchange, a member asked how to run an AutoHotkey script (.AHK) directly from Notepad++ (aka NPP). This video…

808 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