Dropdown SelectedIndexChanged event is not firing

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Hi,

I have dropdown in my page which is having requiredfield validator. If I select an item from that dropdown selectedindexchanged event is firing. If i wont select anything from that dropdown message from requiredfieldvalidator will be shown. Now,
If I select an item selectedindexchanged event is not firing. Below is my code.

<asp:DropDownList ID="ddlCampuses"; runat="server"; OnSelectedIndexChanged="ddlCampuses_SelectedIndexChanged"; AutoPostBack="True" AppendDataBoundItems="True">/asp:DropDownList>

Posted 27-Apr-11 0:43am

dhilip mca

Updated 27-Apr-11 14:54pm

raju melveetilpurayil

v2

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raju melveetilpurayil 27-Apr-11 20:54pm

[edit] edited for more readability[/edit]

2 solutions

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Shahriar Iqbal Chowdhury/Galib · Answer 1 · 2011-04-27T10:27:00

Hi,
Make sure you do not manipulate DropDownList on server side code (.aspx.cs) again. Though you didnt post the full code snippet which is very helpful to find the actual problem, I think the code should be like this.

XML

<asp:DropDownList ID="ddlCampuses" runat="server" OnSelectedIndexChanged="ddlCampuses_SelectedIndexChanged" AutoPostBack="True" AppendDataBoundItems="True">
<asp:ListItem Value="-1" Selected="True">Select</asp:ListItem>
</asp:DropDownList>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="* required" ControlToValidate="ddlCampuses" InitialValue="-1"></asp:RequiredFieldValidator>

Hope this will help.

Pratik Bhesaniya · Answer 2 · 2011-04-27T00:53:00

Solution 1

Try to place your DropeDown into UpdatePanel..

<asp:UpdatePanel ID="upDivision" runat="server">
 <ContentTemplate>

place your dropeDown With requiredfield validator.

</ContentTemplate>

 <Triggers>
 <asp:AsyncPostBackTrigger ControlID="Your DropDown ID" EventName="SelectedIndexChanged" />

   </asp:UpdatePanel>

i hope it will help you...

Posted 27-Apr-11 0:53am

Pratik Bhesaniya

Comments

dhilip mca 27-Apr-11 7:10am

Thanks pratik. I tried your solution. But, Itdint work for me.