Page Load Event

Question

I want to use DropDownList selectedIndexChanged event without auto postback. Can I?

Vikram Agrawal · Answer

Hi Tin Gyi There is many way to solve any problem and one of them is following you can do it with the help of javascript also you can write it on onchange event of DropDownList see the following example ...... HTML: asp : DropDownList ID =DropDownList1 runat =server onchange =display('DropDownList1');> asp : ListItem Value =Item1> asp : ListItem > asp : ListItem Value =Item2> asp : ListItem > asp : ListItem Value =Item3> asp : ListItem > asp : ListItem Value =Item4> asp : ListItem > asp : ListItem Value =Item5> asp : ListItem > asp : DropDownList > asp : Label ID =Label1 runat =server Text => asp : Label > JavaScript: script type =text/javascript> function display(id) { var ddl = document.getElementById(id); var label = document.getElementById( 'Label1' ); label.innerHTML = 'You have selected : ' + ddl.value; } script > please mark it as accepted if it is helpful to you ...

Joginder Banger · Answer

you can use the ajax update panel In Ajax panel halt your page post back. ScriptManager1 runat= server /> UpdatePanel1 UpdateMode= Conditional runat= server > UpdatePanel content you drop downlist here

Munesh Sharma · Answer

You could put the DropDownList into an and set AutoPostBack=true on the DropDownList. You have to set the trigger to the SelectedIndexChanged event. Something like this (don't forget the script manager) ID = ScriptManager1 runat = server /> ID = UpdatePanel1 runat = server > ID = drop1 runat = server /> ControlID = drop1 EventName = SelectedIndexChanged />