Ajax C#

• Visual Studio 2010/Solution Explorer
• Solution.Add New Project.Visual C#.Web.ASP_NET Empty Web Application
• Project.Add New Item.Visual C#.Generic Handler

aj.ashx

<%@ WebHandler Language="C#" Class="Aj" %>
using System;
using System.IO;
using System.Web;
public class Aj : IHttpHandler {
    public void ProcessRequest (HttpContext context) {
        Stream stIn = context.Request.InputStream;
        int nLen = (int)stIn.Length;
        byte[] aIn = new byte[nLen];
        stIn.Read(aIn, 0, nLen);
        System.Text.UTF8Encoding enc = new System.Text.UTF8Encoding();
        string sData = enc.GetString(aIn);

        string[] aData = sData.Split();
        int nA = Convert.ToInt32(aData[2]);
        int nB = Convert.ToInt32(aData[3]);
        int nResult = nA + nB;  
        context.Response.CacheControl = "no-cache";
        context.Response.ContentType = "application/javascript";
        context.Response.Write("["+nResult.ToString()+"]");
    }
     public bool IsReusable {get {return false;}}
}