Asp.net 2019 controls not working after adding ajaxtoolkit

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<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="WebApplication2.WebForm1" %>

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

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title></title>
</head>
<body>
  <form id="form1" runat="server">

    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <div>
      <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
          <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
          <ajaxToolkit:CalendarExtender runat="server" TargetControlID="TextBox1" Format="dd/MM/yyyy" ></ajaxToolkit:CalendarExtender>

<asp:Label runat="server" Text="Label"></asp:Label>

        </ContentTemplate>
      </asp:UpdatePanel>
    </div>
  </form>
</body>
</html>

What I have tried:

In the above code, you can see the Label control which I added, displays without "ID". If am adding ID manually in design view, then in code behind its not appearing to access. intellisense aslo not highlighting open and close html tags.

If I am removing ajaxtookit everything working normally.

Posted 13-Jun-21 20:24pm

manojkumarvat

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