method

check this sample to calculate age by passing the date of birth in textbox:


in aspx:

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




   


   

    Enter date of birth to calculate age:
    : Date in MM/DD/YYYY format
   

in .cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    public int Age(DateTime dt)
    {
        DateTime today = DateTime.Today;
        int age = today.Year - dt.Year;
        if (dt > today.AddYears(-age))
            age--;
        return age;
    }

    protected void TextBox1_TextChanged(object sender, EventArgs e)
    {
        int age = Age(Convert.ToDateTime(TextBox1.Text));
        Response.Write("Age:"+age);
    }
}