IT-Stuffs

For using simple update panel in asp.net first need add the Script Manager, after that add the Update Panel control and add the <ContentTemplate> </ContentTemplate>, <Triggers>, </Triggers> tags.

- Inside the Content template please add the list of controls.
- Inside the Triggers add asp:AsyncPostBackTrigger for the event capture for the which controls event need to use the update panel.

The following codes are easy understand the AJAX Update panel control

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>


    

    

        

            
                Working with AJAX Update Panel With Script Manager
        

        
        
        
            
                
                

                

                Enter Your Name:
                
                


                Enter Your DOB :
            
            
                
            
        
    

    

The C# code behide is looks like :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
// Working with Ajax Update Panel
public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        lblAge.Visible = false;
    }    
    // When the txtDOB text change event fired we need to calculate the 
    //Age of the Give Person and display Age in Years with Days
    protected void txtDOB_TextChanged(object sender, EventArgs e)
    {
        // TimeSpan class is used to find the time differnece and stored result  temp
        TimeSpan tsp=TimeSpan.MinValue;
        try
        {
            DateTime dtDOB = Convert.ToDateTime(txtDOB.Text.Trim());
            tsp = DateTime.Now - dtDOB;
        }
        catch (Exception ex)
        {
            lblAge.Visible = true;
           lblAge.Text=ex.Message.Trim();
        }
        lblAge.Visible = true;
        lblAge.Text = "Hi Mr/Ms." + TextBox1.Text.Trim() + ",
 Your AGE:" + (tsp.Days / 365).ToString() + " Years " + (tsp.Days % 365).ToString() + " Days";
    }
}