DropDownlist event is not firing

Question

Hi I am relatively new to .NET framework but I've overall 3 years of web development experience using Java and php technology. I am right now using VS.NET 2002 with .NET version 1.0 to develop my application. I've a dropdown list server control which gets automatically populater from the database. I want to do so addition  subtraction and lil bit manipulations on the page itself when somebody selects an item from the drop down list. I tried to use selectedindexchanged event handler and by keeping autopostback=true but it doesn't seem to work. Even i kept a break point but the event doesn't get fire at all. Even i tried to use onselectedindexchange method but it also doesn't work. So Please help me out guys. I read almost everything related to dropdownlist alreayd but nothing seems to help me. Thanks in advance

send2manivannan · Answer

Hi We also faced the Same Prob. Finally we identifed that for each page load it bind with the Dataset so Remove the Dropdown Databinding on Postback. ex if(!IsPostBack) { drpdwnNames.DataSource=dt; drpdwnNames.DataTextField =Name; drpdwnNames.DataValueField =Id; drpdwnNames.DataBind(); }

jinwolf · Answer

In the properties window click the Events button (the button that looks like a bolt of lightning) double click the SelectedIndexChanged event and it should then fire it and add the method. If this was already assigned. Delete it and then re-assign it.

sofialimohd · Answer

Hi Be sure the selectedindexchanged event has event handler associated with it as.... Private sub dropdownlist_selectedindexchanged( sender as object e as eventargs) handles dropdownlist.selectedindexchanged Thanks

nick 0 · Answer

You might be experiencing what I would consider a BUG in visual studio. I have had pages for what seems to be no particular reason ignore my event wireup in the interface. It looks like it did it but no code was added web form designer generated code section. Please verify that the code is in there some like this.mydropdownlist.SelectedIndexChanged += new System.EventHandler(this.mydropdownlist_SelectedIndexChanged);