ASP.NET AJAX入门系列（8）：使用ScriptManager控件

看一个简单的调用WebService的例子：

WebService如下，注意在WebServiceSample上加ScriptService特性：页面：

[ScriptService]

public   class  WebServiceSample : System.Web.Services.WebService  {

    public WebServiceSample()

    {

        //Uncomment the following line if using designed components 

        //InitializeComponent(); 

    }


    [WebMethod]

    public string EchoString(String s)

    {
        return "Hello " + s;
    }

}

ASPX

<% @ Page Language="C#" AutoEventWireup="true" CodeFile="Default3.aspx.cs" Inherits="Default3"  %>

< html  xmlns ="http://www.w3.org/1999/xhtml"   >

< head  runat ="server" >

     < title > Untitled Page </ title >

</ head >

< script  type ="text/javascript"  language ="JavaScript" >

    function OnbuttonGo_click() 

    {
        requestSimpleService = WebServiceSample.EchoString(

            document.getElementById('inputName').value,       //params

            OnRequestComplete    //Complete event

            );

        return false;
    }

    function OnRequestComplete(result) 

    {
        alert(result);
    }

</ script >

< body >

     < form  id ="form1"  runat ="server" >

     < asp:ScriptManager  ID ="ScriptManager1"  runat ="server" >

         < Services >

             < asp:ServiceReference  Path ="WebServiceSample.asmx" />

         </ Services >

     </ asp:ScriptManager >

     < div >

         < input  type ="text"  id ="inputName"  size =20 />

         < input  id ="button"  type ="button"  value ="调 用"  onclick ="return OnbuttonGo_click()"   /></ div >

     </ form >

</ body >

</ html >