Beginning Web Development, Silverlight, and ASP.NET AJAX

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CHAPTER 3 ■ WEB FORMS WITH ASP.NET
First Number          
Second Number   
Add
Subtract
The Result is:
You will now need to modify the Page_Load method once again to handle the text
boxes instead of the more general input fields. Because you’ll be using ASP.NET controls
that the server “sees” and can understand, you don’t need to pull the values to add and
subtract from the Request.Form array as you did previously. Instead, you simply access
each TextBox control’s Text property. You can see this in Listing 3-8.
Listing 3-8. Page_Load Modified for ASP.NET Text Boxes
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{