1.1与2.0异步调用Web服务简单示例

WebService代码：

using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service : System.Web.Services.WebService
{
    public Service () {

        //如果使用设计的组件，请取消注释以下行 
        //InitializeComponent(); 
    }

    [WebMethod]
    public string HelloWorld(string strName) {
        string strName1 = strName ?? "萝卜";
        return strName1 + " 你好";
    }
}

1.1异步调用：因为没有VS2003，用#develop写的。

using System;
using MyService = ServiceTest.Service;

namespace ServiceTest
{
    class MainClass
    {
        static IAsyncResult iresult;
        static MyService.Service service = new MyService.Service();
        
        public static void Main(string[] args)
        {
            //同步调用
            Console.WriteLine(service.HelloWorld(null));
            
            //异步调用
            AsyncCallback callback = new AsyncCallback(CallBack);
            
            iresult = service.BeginHelloWorld("萝卜青菜", callback, null);
            
            Console.Read();
        }
        
        static void CallBack(IAsyncResult iar)
        {
            if (object.Equals(null, iar))
            {
                Console.WriteLine("Null");
                return;
            }
            
            if (iar.IsCompleted)
            {
                Console.WriteLine(service.EndHelloWorld(iar));
            }
        }
    }
}

2.0异步调用：

using System;
using System.Collections.Generic;
using System.Text;

using myService = ServiceTest.FirstService;

namespace ServiceTest
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.ForegroundColor = ConsoleColor.Green;
            // 同步调用
            myService.Service service = new myService.Service();
            Console.WriteLine(service.HelloWorld(null));

            // 异步调用
            service.HelloWorldCompleted += delegate(object sender, myService.HelloWorldCompletedEventArgs e)
            {
                if (object.Equals(null, e.Error))
                {
                    Console.WriteLine(e.Result);
                }
                else
                {
                    Console.WriteLine(e.Error.Message);
                }
            };
            service.HelloWorldAsync("萝卜青菜");
            Console.Read();
        }
    }
}