Services用来管理对WebService的调用，通过<asp:ServiceReference>标签可以在Services中注册一个WebService，在运行时ScriptManager将为每一个ServiceReference对象生成一个客户端代理，<asp:ServiceReference>标签一个很重要的属性是Path，用来指定WebService的路径，如下所示：
<
asp:ScriptManager?
ID
="SM1"
?runat
="server"
>
????
Services
????????
asp:ServiceReference?
Path
="Service.asmx"
/>
</
asp:ScriptManager
>
看一个简单的调用WebService的例子：
WebService如下，注意在WebServiceSample上加ScriptService特性：
[ScriptService]
public
?
class
?WebServiceSample?:?System.Web.Services.WebService?
{
????public?WebServiceSample()
????
{
????????//Uncomment?the?following?line?if?using?designed?components?
????????InitializeComponent();?
????}
????[WebMethod]
?????string?EchoString(String?s)
????
{
????????return"Hello?+?s;
????}
}
ASPX页面：
<%
@?Page?Language="C#?AutoEventWireuptrue?CodeFileDefault3.aspx.cs?InheritsDefault3?
%>
html?
xmlns
="http://www.w3.org/1999/xhtml"
head?
runat
title
Untitled?Page
head
script?
type
="text/javascript"
?language
="JavaScript"
>
????function?OnbuttonGo_click()?
????
{
????????requestSimpleService??WebServiceSample.EchoString(
????????????document.getElementById('inputName').value,???????//params
????????????OnRequestComplete????Complete?event
????????????);
????????return?false;
????}?OnRequestComplete(result)?
????
{
????????alert(result);
????}
script
body
form?
id
="form1"
="ScriptManager1"
????????????
="WebServiceSample.asmx"
div
input?
="text"
?id
="inputName"
?size
=20
="button"
?type
?value
="调?用"
?onclick
="return?OnbuttonGo_click()"
/></
form
html
>
运行后效果如下：
当然了也可以在运行时动态的在Services中加入ServiceReference，下面看一个运行时动态加入ServiceReference的例子：
>
void?Page_Load(object?sender,?EventArgs?e)
????
{
????????ServiceReference?sr?new?ServiceReference();
????????sr.Path?WebServiceSample.asmx;
????????ScriptManager1.Services.Add(sr);
????}
>
?OnbuttonGo_click()?
????
{
????????requestSimpleService?;
????}
?
?????OnRequestComplete(result)?
????
{
????????alert(result);
????}
?
????
????
>
可以看到运行后和在ScriptManager中直接加入的效果是一样的。
