Timer In ASP.Net Using AJAX

With the help of AJAX we can postback an specific  part of a web part.
Normally when we click on a control which has capability to postback its load entire
page which time and data consuming both.You can save your time and data cost both
With Ajax
Controls..

• ScriptManager
• UpdatePanel
• Timer
• Label

ASP Source code *.aspx


<form id="form1" runat="server">
    <asp:ScriptManager ID="ScriptManager1" runat="server">
    </asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
            <asp:Timer ID="Timer1" runat="server" Interval="1000" ontick="Timer1_Tick">
            </asp:Timer>
        </ContentTemplate>
    </asp:UpdatePanel>
    </form>
Server side code *.aspx.cs


public partial class _Default : System.Web.UI.Page
{
    static int i;
    
    protected void Timer1_Tick(object sender, EventArgs e)
    {
        i++;
        Label1.Text = i.ToString();
    }
}