Hi there,
Check this out:
Say you have a page that perform simple calculation like below:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="BoxingUnBoxing.aspx.cs" Inherits="BoxingUnBoxing" %>
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>Boxing Unboxingtitle>head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtValue1" runat="server">asp:TextBox>
+
<asp:TextBox ID="txtValue2" runat="server">asp:TextBox>
=
<asp:TextBox ID="txtValue3" runat="server">asp:TextBox> <asp:Button ID="btnAdd"
runat="server" OnClick="btnAdd_Click" Text="Button" />div>
form>body>
html>
On your code behind you have function to perform calculation
protected void btnAdd_Click(object sender, EventArgs e){
int value1 = Convert.ToInt32(txtValue1.Text); // unboxing, convert reference type to value type
int value2 = Convert.ToInt32(txtValue2.Text); // unboxing, convert reference type to value type
int value3 = value1 + value2; // calculate here
txtValue3.Text = Convert.ToString(value3); // boxing, convert value type back to reference type
}
