<4>HelloWorldService服務代碼。為了能使服務被asp.net ajax客戶端調用，必須給服務指明[ScriptService]屬性（為了使用這一屬性，需要引用Microsoft.Web.Script.Services命名空間）。
 1using System;
 2using System.Web.Services;
 3using System.Web.Services.Protocols;
 4using Microsoft.Web.Script.Services;
 5
 6[WebService(Namespace = "http://tempuri.org/")]
 7[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
 8[ScriptService]
 9public class HelloWorldService : System.Web.Services.WebService {
10
11    public HelloWorldService () {
12
13        //Uncomment the following line if using designed components
14        //InitializeComponent();
15    }
16
17    [WebMethod]
18    public string HelloWorld(string name) {
19        string hello = String.IsNullOrEmpty(name) ? "無名氏" : name;
20        hello += "你好,當前服務器時間是：";
21        hello += DateTime.Now.ToUniversalTime();
22        return hello;
23    }
24   
25}