Update Panel Demo

<form id=”form1″ runat=”server”>
        <asp:ScriptManager ID=”ScriptManager1″ runat=”server”>
        </asp:ScriptManager>
    <div>
        Label outside the Update Panel Refreshed at:
        <asp:Label ID=”Label2″ runat=”Server”></asp:Label>
        <br />
        <br />
        <asp:Button ID=”Button1″ runat=”Server” Text=”Refresh” OnClick=”Button1_Click” />
        <br />
        <br />
        <asp:UpdatePanel ID=”UpdatePanel1″ runat=”Server” UpdateMode=”conditional”>
        <ContentTemplate>
            Label within the Update Panel Refreshed at:
            <asp:Label ID=”Label1″ runat=”server”></asp:Label>       
        </ContentTemplate>
        <Triggers>
            <%–<asp: PostBackTrigger ControlID=”Button1″ />–%>
            <asp:AsyncPostBackTrigger ControlID=”Button1″ EventName=”Click” />
        </Triggers>      
        </asp:UpdatePanel>   
    </div>
    </form>

 

Code behind

 protected void Page_Load(object sender, EventArgs e)
    {
        Label1.Text = System.DateTime.Now.ToString();
        Label2.Text = System.DateTime.Now.ToString();
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
       
    }