ASP.Net Ajax Update Panel Sample

<'asp:UpdatePanel runat="server" id="UpdatePanel" updatemode="Conditional"'>
<'Triggers>
<'asp:AsyncPostBackTrigger controlid="UpdateButton2" eventname="Click" /'>
<'/Triggers'>
<'ContentTemplate>
<'asp:Label runat="server" id="DateTimeLabel1" /'>
<'asp:Button runat="server" id="UpdateButton1" onclick="UpdateButton_Click" text="Update" /'>
<'/ContentTemplate'>
<'/asp:UpdatePanel'>
<'asp:UpdatePanel runat="server" id="UpdatePanel1" updatemode="Conditional">
<'ContentTemplate'>
<'asp:Label runat="server" id="DateTimeLabel2" /'>
<'asp:Button runat="server" id="UpdateButton2" onclick="UpdateButton_Click" text="Update" /'>
<'/ContentTemplate'>
<'/asp:UpdatePanel'>



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Code Behind
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protected void UpdateButton_Click(object sender, EventArgs e)
{
DateTimeLabel1.Text = DateTime.Now.ToString();
DateTimeLabel2.Text = DateTime.Now.ToString();
System.Threading.Thread.Sleep(5000);

}