Not a member? First the ASP.Net DropDownList will be referenced using JavaScript or jQuery on Client Side and then its SelectedIndexChanged event will be called by making use of the __doPostBack JavaScript function. For example, if I have a dropdownlist and in codebehind I change the selected index to a default with codebehind, I don't then want the the selectedindexchanged even to run for the dropdownlist. All public events are relayed using the jQuery event system, and they are triggered on the element that Select2 is attached to. New here? The last option other. The other difference is that the onchange event also works on elements. I have a drop down list with lets say city name. A simple method of making dropdown lists automatically navigate to a new page when a new selection is made. When the element is :checked (by clicking or using the keyboard) for and ;; When the user commits the change explicitly (e.g., by selecting a value from a 's dropdown with a mouse click, by … He's been programming since the 80's and has been, in various guides, an astrophysicist, bacyard mechanic, mathematician, physicist, breeder of carnivorous plants, hydrologist, geomorphologist, defence intelligence researcher and then, when all that got a bit rough on the nerves, a web developer. Sign Up. The difference is that the oninput event occurs immediately after the value of an element has changed, while onchange occurs when the element loses focus, after the content has been changed. You can attach to them using the .on method provided by jQuery: $('#mySelect2').on('select2:select', function (e) { … If you have any other ideas I'm all ears. I want to know if there's any way to cancel the autopostback using javascript? When other is selected then a new page/window opens up to allow the user to enter in their city. Change the selected value of a drop-down list with jQuery. 2. onselectedindexchange is a server side event that is y u r getting that error since asp.net cannot find the function that u specified there in the codebehind, "Metal" is right the onchange event will work. Cancel. Once they enter the city and click ok I add that city to a db. Thanks for the code, but alas it doesn't work. This provides a "refresh/reset" functionality without using any additional real estate. I'm having the same problem with radiobutton's with autopostback=true, I need confirm() from user before postback, and be able to abort postback if it's cancel. Nice, but what if I want to use an array to fill in the list portion of a drop-down box, like this: I use essentially the same technique in a self refering page to select criteria for displaying a database record. Because in the example given, the author uses the selection to change pages and I just want the value so that the user doesn't have to click on two buttons instead of one. Last post Mar 19, 2010 06:47 PM by MetalAsp.Net. Last post Feb 13, 2012 12:31 AM by vendan. If you've ever wondered how they do this then as you probably expected it's very simple. We often see a button next to the list that the user should press in order to actually activate there selection: The user selects the value from the dropdown, hits Go, and the choice is made. I want to know if there's any way to cancel the autopostback using javascript? For example, this can be useful when: Clicking on a "Submit" button, prevent it from submitting a form; Clicking on a link, prevent the link from following the URL; Note: Not all TAGs: ASP.Net, JavaScript… 848. When the dropdown element is clicked, it opens(if it is closed) or closes(if it is opened).

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