UpdatePanel control is defined dynamically but constructing the tree programmatically : UpdatePanel « ASP.net Controls « ASP.NET Tutorial

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ASP.NET Tutorial » ASP.net Controls » UpdatePanel 
3. 31. 2. UpdatePanel control is defined dynamically but constructing the tree programmatically
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" 
    Inherits="Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Building Regions Dynamically</title>
</head>
<body>
    <form id="form1" runat="server">
        <div runat="server" id="pageContent">
            <asp:ScriptManager ID="ScriptManager1" runat="server" />
        </div>
    </form>
</body>
</html>

File: Default.aspx.cs

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Drawing;
using System.Web.UI;
using System.Web.UI.WebControls;


public partial class Default : System.Web.UI.Page
{
    private Label Label1; 

    protected void Page_Load(object sender, EventArgs e)
    {
        UpdatePanel up1 = new UpdatePanel();
        up1.ID = "UpdatePanel1";
        
        Button button1 = new Button();
        button1.ID = "Button1";
        button1.Text = "What time is it?";
        button1.Click += new EventHandler(Button1_Click);

        LiteralControl lit = new LiteralControl("<br>");

        Label1 = new Label();
        Label1.ID = "Label1";
        Label1.Text = "[time]";
        
        up1.ContentTemplateContainer.Controls.Add(button1);
        up1.ContentTemplateContainer.Controls.Add(lit)
        up1.ContentTemplateContainer.Controls.Add(Label1);

        this.Form.FindControl("pageContent").Controls.Add(up1);

    }

    protected void Button1_Click(object sender, EventArgs e)
    {
        Label1.Text = DateTime.Now.ToLongTimeString()
    }
}
3. 31. UpdatePanel
3. 31. 1. Clock
3. 31. 2. UpdatePanel control is defined dynamically but constructing the tree programmatically
3. 31. 3. applying partial rendering to a sample ASP.NET form
3. 31. 4. RegisterAsyncPostBackControl method on the script manager class
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