Question

I am using .NET 3.5 and building pages inside of the Community Server 2008 framework.

On one of the pages, I am trying to get an UpdatePanel working.

I took a sample straight from ASP.NET website, update a time in an UpdatePanel to current time by clicking a button, but for some reason when I try and perform the function the whole page refreshes.

Here is what I have:

protected void Button1_Click(object sender, EventArgs e) {     Label1.Text = 'Panel refreshed at ' + DateTime.Now.ToString();     Label2.Text = 'Panel refreshed at ' + DateTime.Now.ToString(); } 

<asp:ScriptManager ID='ScriptManager1' runat='server'/>  <asp:UpdatePanel ID='UpdatePanel1' runat='server'>     <ContentTemplate>         <fieldset>             <legend>UpdatePanel</legend>             <asp:Label ID='Label1' runat='server' Text='Panel created.'></asp:Label><br />             <asp:Button ID='Button1' runat='server' OnClick='Button1_Click' Text='Button' />         </fieldset>     </ContentTemplate> </asp:UpdatePanel> 

Whenever I click the button, sure the panel updates – but the whole page posts back! I can see the whole page flashing. What the heck am I doing wrong?

I am inside of a nested Masterpage, but I’m not sure if this is a problem. Could there be something in this Community Server framework that I’m using that causes all events to postback?

Answer 1

Did you try setting Button1 as an AsyncPostBackTrigger in the Triggers section? Set the ChildrenAsTriggers property to true and the UpdateMode property to Conditional.

protected void Button1_Click(object sender, EventArgs e) {         Label1.Text = 'Panel refreshed at ' + DateTime.Now.ToString();         UpdatePanel1.Update(); }     

<asp:ScriptManager ID='ScriptManager1' runat='server'/> <asp:UpdatePanel ID='UpdatePanel1' runat='server' ChildrenAsTriggers='true' UpdateMode='Conditional'>     <Triggers>                 <asp:AsyncPostBackTrigger ControlID='Button1' EventName='Click' />         </Triggers>         <ContentTemplate>                 <fieldset>                         <legend>UpdatePanel</legend>                         <asp:Label ID='Label1' runat='server' Text='Panel created.'></asp:Label><br />                         <asp:Button ID='Button1' runat='server' OnClick='Button1_Click' Text='Button' />                 </fieldset>         </ContentTemplate> </asp:UpdatePanel>