Step by Step 创建一个 Web Service

    [Serializable]
    public class Contact
    {
        private string name;

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        private int age;

        public int Age
        {
            get { return age; }
            set { age = value; }
        }
    }

    /// <summary>
    /// Summary description for HelloWebService
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
    // [System.Web.Script.Services.ScriptService]
    public class HelloWebService : System.Web.Services.WebService
    {

        [WebMethod]
        public string GetMessage(string name)
        {
            return "Hello " + name;
        }

        [WebMethod]
        public Guid CreateContact(Contact c)
        {
            return Guid.NewGuid();
        }
    }

        protected void Button1_Click(object sender, EventArgs e)
        {
            HelloWebService.HelloWebServiceSoapClient client = new HelloWebService.HelloWebServiceSoapClient();
            Label1.Text = client.GetMessage(TextBox1.Text);
        }

        protected void Button2_Click(object sender, EventArgs e)
        {
            HelloWebService.HelloWebServiceSoapClient client = new HelloWebService.HelloWebServiceSoapClient();
            Label2.Text = client.CreateContact(new HelloWebService.Contact()).ToString();
        }