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js webservice

WebServiceJavaScriptHTCSOAPWeb 
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1.  创建webservice，为了免于落俗我稍稍修改了创建webserice的默认webmethod。^_^
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 () {

        //Uncomment the following line if using designed components 
        //InitializeComponent(); 
    }

    [WebMethod]
    public string SayHelloTo(string Name) {
        return "Hello "+Name;
    }
    
}
还是俗了点。:)

2. js调用webservice+xmlhttp的实现部分。

<html>
<title>
Call webservice with javascript and xmlhttp.
</title>
<body>
<script language="javascript">

//Test function with get method.
function RequestByGet(data){

var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
//Webservice location.
var URL="http://localhost:1323/WebSite6/Service.asmx/SayHelloTo?Name=Zach";
xmlhttp.Open("GET",URL, false); 
xmlhttp.SetRequestHeader ("Content-Type","text/xml; charset=utf-8"); 
xmlhttp.SetRequestHeader ("SOAPAction","http://tempuri.org/SayHelloTo"); 
xmlhttp.Send(data); 
var result = xmlhttp.status; 
//OK
if(result==200) { 
document.write(xmlhttp.responseText); 
} 
xmlhttp = null; 
}

//Test function with post method
function RequestByPost(value)
{
var data;
data = '<?xml version="1.0" encoding="utf-8"?>'; 
data = data + '<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">'; 
data = data + '<soap:Body>'; 
data = data + '<SayHelloTo xmlns="http://tempuri.org/">'; 
data = data + '<Name>'+value+'</Name>'; 
data = data + '</SayHelloTo>'; 
data = data + '</soap:Body>'; 
data = data + '</soap:Envelope>';

var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); 
var URL="http://localhost:1323/WebSite6/Service.asmx";
xmlhttp.Open("POST",URL, false); 
xmlhttp.SetRequestHeader ("Content-Type","text/xml; charset=gb2312"); 
xmlhttp.SetRequestHeader ("SOAPAction","http://tempuri.org/SayHelloTo"); 
xmlhttp.Send(data); 
document.write( xmlhttp.responseText);

}

</Script>

<input type="button" value="CallWebserviceByGet" onClick="RequestByGet(null)">
<input type="button" value="CallWebserviceByPost" onClick="RequestByPost('Zach')">

</body>
</html>
对于使用post方法需要发送的那堆东东可以在webservice的测试页面中找到，自己拼凑加上对应的参数就可以。

我发现用post方法的时候响应很慢，是因为用Post方法时发送的数据多的原因吗？

 

.net 下用javascript调用webservice

.net 下用javascript调用webservice的话，要用到webservice behavior。下面以一个例子讲解之，比较简单

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wsdl
addservice.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 doesn't 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>

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