Updatepaneltest. aspx
<% @ Page Language = "C #" autoeventwireup = "true" codefile = "updatepaneltest. aspx. cs" inherits = "updatepaneltest" %>
<% @ Register Assembly = "Microsoft. Web. Atlas" namespace = "Microsoft. Web. UI" tagprefix = "Atlas" %>
<! Doctype HTML public "-// W3C // dtd xhtml 1.0 transitional // en" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<HTML xmlns = "http://www.w3.org/1999/xhtml">
<Head runat = "server">
<Title> updatepaneltest </title>
</Head>
<Body>
<Form ID = "form1" runat = "server">
<Atlas: scriptmanager id = "scriptmanager1" runat = "server" enablepartialrendering = "true">
</Atlas: scriptmanager>
<Br/>
<Asp: dropdownlist id = "dropdownlist1" runat = "server" autopostback = "true" onselectedindexchanged = "dropdownlist1_selectedindexchanged">
<Asp: listitem> bad </ASP: listitem>
<Asp: listitem> good </ASP: listitem>
<Asp: listitem> Best </ASP: listitem>
</ASP: dropdownlist>
<Div>
& Nbsp; <Atlas: updatepanel runat = "server" id = "updatepanel1">
<Contenttemplate>
<Asp: Label id = "label1" runat = "server" text = "label"> </ASP: Label>
</Contenttemplate>
<Triggers>
<Atlas: controleventtrigger controlid = "dropdownlist1" eventname = "selectedindexchanged"/>
</Triggers>
</Atlas: updatepanel>
</Div>
</Form>
</Body>
</Html>
Updatepaneltest. aspx. CS
Using system;
Using system. Data;
Using system. configuration;
Using system. collections;
Using system. Web;
Using system. Web. Security;
Using system. Web. UI;
Using system. Web. UI. webcontrols;
Using system. Web. UI. webcontrols. webparts;
Using system. Web. UI. htmlcontrols;
Public partial class updatepaneltest: system. Web. UI. Page
{
Protected void page_load (Object sender, eventargs E)
{
}
Protected void dropdownlistincluselectedindexchanged (Object sender, eventargs E)
{
This. label1.text = "selected:" + this. dropdownlist1.selectedvalue;
}
}
ThanksTerrylee