Data Controls :: Dropdownlist SelectedIndexChanged Getting Called On Button Click Event

Jan 7, 2013

I have a dropdownlisbox  , i am changing the selectedIndex by PageMethod(i.e it will change its  value and text on checkbox status). At that time it don't fire the selectedIndexchange method but when i click the button it fires(i.e on postback).

<td width="65%" align="left">
<asp:UpdatePanel ID="upPCountry" runat="server" UpdateMode="Conditional">
<ContentTemplate>
<asp:DropDownList ID="ddlCountry" runat="server" Width="125px"
AutoPostBack="true" onselectedindexchanged="ddlCountry_SelectedIndexChanged" >
<asp:ListItem Value="1">USA</asp:ListItem>
<asp:ListItem Value="2">Canada</asp:ListItem>

[Code] .....

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