1 、首先，要创建一个webservice，比如
<%@ webservice language="c#" class=mymath %> using system; using system.web.services; public class mymath { [webmethod] public int add(int a, int b) { return a + b; } [webmethod] public int subtract(int a, int b) { return a - b; } }
然后发布，先得到其wsdl。
2、首先，我们要下载webbehavior.htc这个文件（可以到http://msdn.microsoft.com/downloads/samples/internet/behaviors/library/webservice/default.asp.）
去下载，然后放到你的web当前目录下
然后在要调用webserice的页面中，修改如下
<body>
<div id="addservice" style="behavior:url(webservice.htc)"></div>
</body>
这里我们将div id命名为有意义的名称，并且指定style为 webservice行为。接着，我们要书写javascript来调用webserice了：
首先，我们在javascript中，调用其wsdladdservice.useservice("http://localhost/services/math.asmx?wsdl","mymath");
使用id.useservice(wsdll路径,简单的命名方式）;
我们之前设定的id是addservice，而为了给客户端调用方便，我们这里起了名称，叫mymath。而为了保证能正确调用webserice,必须在body里的onload事件里，马上加载处理webservice调用的javascript,如下
<script language="javascript"> function init() { addservice.useservice("http://localhost/services/math.asmx?wsdl","mymath"); } </script> <body onload="init()"> <div id="service" style="behavior:url(webservice.htc)"> </div> </body>
在上面，我们通过webservice行为，首先得到了返回webservice的wsdl,接下来我们要进行调用了，调用的格式如下： icallid = id.friendlyname.callservice([callbackhandler,] "methodname", param1, param2, ...);
这里id是我们在div里设置的id,而fridndbyname是我们刚才为方面而起的命，这里就是mymath了，而callbackhandler是使用回调函数的过程名，如果无设置的话，则默认是使用onresult所调用的方法来进行处理，下文会讲到，而param1,,param2等则是说传入的参数了，如：
<script language="javascript"> // all these variables must be global, // because they are used in both init() and onresult(). var icallid = 0; var inta = 5; var intb = 6; function init() { // establish the friendly name "mymath" for the webserviceurl service.useservice("/services/math.asmx?wsdl","mymath"); // the following method doesnt specify a callback handler, so onwsresult() is used icallid = service.mymath.callservice("add", inta, intb); } function onwsresult() { // if there is an error, and the call came from the call() in init() if((event.result.error)&&(icallid==event.result.id)) { // pull the error information from the event.result.errordetail properties var xfaultcode = event.result.errordetail.code; var xfaultstring = event.result.errordetail.string; var xfaultsoap = event.result.errordetail.raw; // add code to handle specific error codes here } // if there was no error, and the call came from the call() in init() else if((!event.result.error) && (icallid == event.result.id)) { // show the arithmetic! alert(inta + + + intb + = + event.result.value); } else { alert("something else fired the event!"); } } </script> <body onload="init()"> <div id="service" style="behavior:url(webservice.htc)" onresult="onwsresult()"> </div> </body>
注意，用onresult方式返回的话，要在div部分的onresult中指定处理的方法，这里是用onwsresult()方法，其中根据返回的信息来判断是否出错，出错的话则显示。
如果用回调的话，则如下处理
<script language="javascript"> // all these variables must be global, // because they are used in both init() and onresult(). var icallid = 0; var inta = 5; var intb = 6; function init() { // establish the friendly name "mymath" for the webserviceurl service.useservice("/services/math.asmx?wsdl","mymath"); // the following uses a callback handler named "mathresults" icallid = service.mymath.callservice(mathresults, "add", inta, intb); } function mathresults(result) { // if there is an error, and the call came from the call() in init() if(result.error) { // pull the error information from the event.result.errordetail properties var xfaultcode = result.errordetail.code; var xfaultstring = result.errordetail.string; var xfaultsoap = result.errordetail.raw; // add code to handle specific error codes here } // if there was no error else { // show the arithmetic alert(inta + + + intb + " = " + result.value); } } </script> <body onload="init()"> <div id="service" style="behavior:url(webservice.htc)"> </div> </body>
