Problem of Event of DropDownList in asp.net

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I was tried the above problem, I was done binding data to DropdownList. there not a problem, I wrote under SelectedIndexechanged event of DropDownList, When selecting the item in DropdownList , based on that display the data in different controls.
The problem is again we can select the same Item in DropDownList doen't go to the postback to server, we can select the another item, that will fire and also we select next the previous item is fire, The main problem is when we select the same item again and again doen't fire.I want fire the same item again and again of DropDownList.

for example: I can bind the Country names to dropdownList. I wrote code under dropdownList event. If we can select the India occurs the postback then related states coming. But here problem is again we can select same name like India. It doen't fire the event.

Posted 19-Jul-12 19:01pm

CH Guravaiah

Updated 19-Jul-12 19:56pm

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pradiprenushe 20-Jul-12 1:10am

SelectedIndexechanged Name itself suggesting too much that this will called after change. By the way why you are requiring this behavior?

Vani Kulkarni 20-Jul-12 1:15am

Agreed with Pradip. PLease let us know why do you need this behaviour?

Sandeep Mewara 20-Jul-12 1:37am

For FUN? :P

CH Guravaiah 20-Jul-12 1:49am

Oh,It not fun man. Why am asking is we wrote the code selectedIndexeChanged Event , When we select same Item or another item going to postback to server. My intension is What is reason, is there any reason for that event.

Sebastian T Xavier 20-Jul-12 1:10am

Your question is not clear.. try to add some code snippet , that will explain in a better way..

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Christian Graus · Answer 1 · 2012-07-19T19:37:00

Solution 1

Um, that's stupid. Why would you want an event to fire when your input has not changed ? It's called SELECTEDINDEXCHANGED, but you want it to fire when it's not changed ? It's working as advertised, and you're not going to be able to change it, because I don't think there's a browser level event for 'I dropped the drop down but didn't change the value'

Posted 19-Jul-12 19:37pm

Christian Graus

Comments

Ankur^\m/ 20-Jul-12 2:01am

Exactly, the requirement is weird.
I don't think there's a browser level event for 'I dropped the drop down but didn't change the value'
Well it can be done using jQuery - http://stackoverflow.com/questions/898463/fire-event-each-time-a-dropdownlist-item-is-selected-with-jquery

Christian Graus 20-Jul-12 2:02am

Really ? Wow.

CH Guravaiah 20-Jul-12 2:19am

Really i don't know Jquery. can send the link of javascript.

Christian Graus 20-Jul-12 2:23am

You're not a web programmer in 2012 if you don't know jquery. You're also not a programmer if your work consists of asking people for links and copying and pasting. According to the code linked to, it's the blur event that fires when the control loses focus, so you could handle that with pure javascript. I'm not giving you the code though, if you can't take the name of the event and find documentation on the web, then you're not interested in being a programmer, or in my help.

CH Guravaiah 20-Jul-12 3:13am

I am a learner not a programmer.can u help me

Christian Graus 20-Jul-12 17:46pm

Then you need to learn jquery. That's what 'learner' means. If that's too much for you to learn right now, then you need to scale back on what you're attempting. I still don't see why you need an event, will the states in india change, and need refreshing ? A refresh will lose the selected value in the next level down, and generally be bad. It sounds to me like you're working on a real world project despite not having any clue what you're doing. I have no interest in supporting that, it is immoral. If you want to learn, I am happy to provide direction that's at your level for learning. If you're trying to complete a paid project you're incapable of, I have no interest in doing the work for you.

Sandeep Mewara · Answer 2 · 2012-07-19T20:04:00

Why am asking is we wrote the code selectedIndexeChanged Event , When we select same Item or another item going to postback to server. My intension is What is reason, is there any reason for that event.
When we select same item, there will be no postback, as a matter of fact there is NO NEED of postback. Why would anything change at all if the same item is selected? Since there is no need to have anything different, nothing happens and thus it is designed as so.