Fire a server event on selected index changed

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I am creating a dropdown edit/search box for my asp.net/c# website, the code now works fine but I want that when the selected index gets changed it would fire an event

This is the code I have got now

ASP.NET

<form  runat="server" id="form1">
        <div class="ui-widget">
            <asp:DropDownList ID="combobox" runat="server" AutoPostBack="true">
                <asp:ListItem Value="White" Selected="True">White</asp:ListItem>
                <asp:ListItem Value="Black">Black</asp:ListItem>
                <asp:ListItem Value="Blue">Blue</asp:ListItem>
            </asp:DropDownList>
        </div>
    </form>

I have tried multiple things to get this working, one of it is adding this:

HTML

OnSelectedIndexChanged="combobox_SelectedIndexChanged1"

The event does not fire at all but sometimes only after hitting Enter, I need it to fire when the index gets changed.
I don't know if I am doing this wrong or if there just isn't a way..
Can some please help me to find a solution
Thank You,

EDIT:
I added the EnableViewState, I am not sure what that is meant to do, but after putting my break point.. i can clearly see that when I click on another item from the drop downlist it doesn't fire the event because it doesn't go into this onSelectedIndexChanged code block.. I am so confused to why this is not working

Posted 11-Nov-13 21:22pm

Member 10395722

Updated 11-Nov-13 22:19pm

v5

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Orcun Iyigun 12-Nov-13 3:51am

If you add that OnSelectedIndexChanged event to your dropdown it should work? Which browser are you trying it? IE?

Member 10395722 12-Nov-13 4:12am

I was trying this code in Chrome, the latest version

2 solutions

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**Orcun Iyigun** · Answer 1 · 2013-11-11T22:36:00

Well from your markup I see it is lacking the event:

C#

<asp:dropdownlist id="combobox" runat="server" autopostback="true" enableviewstate="true" onselectedindexchanged="combobox_SelectedIndexChanged" xmlns:asp="#unknown">
   <asp:listitem value="White" selected="True">White</asp:listitem>
   <asp:listitem value="Black">Black</asp:listitem>
   <asp:listitem value="Blue">Blue</asp:listitem>
</asp:dropdownlist>

In your code behind:

C#

protected void combobox_SelectedIndexChanged(object sender, EventArgs e)
{
   //Do stuff
}

This should work.

Good luck,
OI

Vishal Pand3y · Answer 2 · 2013-11-11T21:49:00

Solution 1

put Some break points on selected index changed code and see whether it is compiling or not ...

Posted 11-Nov-13 21:49pm

Vishal Pand3y

Updated 11-Nov-13 22:23pm

v2

Comments

Vishal Pand3y 12-Nov-13 4:28am

check combobox_SelectedIndexChanged1 and code on which you have put break points are same or not
i am saying that because 1 after name confused me