Ajax simple Example

ASPX page

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="asp" %>


<asp:ToolkitScriptManager ID="kbk" runat="server"></asp:ToolkitScriptManager>
    <asp:TextBox ID="txt" runat="server"></asp:TextBox>
    <asp:CalendarExtender ID="CalendarExtender1" runat="server" PopupButtonID="txt" TargetControlID="txt">
</asp:CalendarExtender>