在JavaScript中调用WebService

1． 在JavaScript中调用WebService

<script language="javascript">

function PostRequestData(URL,data){

var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

xmlhttp.Open("POST",URL, false);

xmlhttp.SetRequestHeader ("Content-Type","text/xml; charset=utf-8");

xmlhttp.SetRequestHeader ("SOAPAction","http://tempuri.org/myService/test/isNumner");



try {

xmlhttp.Send(data);

var result = xmlhttp.status;

}

catch(ex) {

return("0" + ex.description + "|" + ex.number);

}

if(result==200) {

return("1" + xmlhttp.responseText);

}

xmlhttp = null;

}



function loadit(value){

var url = 'http://localhost/myService/test.asmx';

var data ;

var r;



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 + '<isNumner xmlns="http://tempuri.org/myService/test">';

data = data + '<str>'+value+'</str>';

data = data + '</isNumner>';

data = data + '</soap:Body>';

data = data + '</soap:Envelope>';



r=PostRequestData(url,data);

document.write(r);

}

loadit('5');

</script>



还可以使用微软的htc组件来实现，可以到这里下载:

http://msdn.microsoft.com/workshop/author/webservice/webservice.htc


<script language="javascript">

function timer(){

service.useService("http://localhost/myService/test.asmx?WSDL","test");

service.test.callService(callback,"isNumner",'gdh');

}



function callback(res){

if (!res.error)

time.innerText=res.value;

}

</script>



<div id="service" style="behavior:url(webservice.htc)"></div>

<span id="time"></span>



2. 在Asp中

<%@LANGUAGE="VBSCRIPT" CODEPAGE="936"%>

<%

Dim strxml

Dim str



'定义soap消息

strxml = "<?xml version='1.0' encoding='tf-8'?>"

strxml = strxml & "<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/'>"

strxml = strxml & "<soap:Body> "

strxml = strxml & "<isNumner xmlns='http://tempuri.org/myService/test'>"

strxml = strxml & "<str>4</str>"

strxml = strxml & "</isNumner>"

strxml = strxml & "</soap:Body>"

strxml = strxml & "</soap:Envelope>"



'定义一个XML的文档对象，将手写的或者接受的XML内容转换成XML对象

'set x = createobject("Microsoft.DOMDocument")

'初始化XML对象

'将手写的SOAP字符串转换为XML对象

' x.loadXML strxml

'初始化http对象

Set h = createobject( "Microsoft.XMLHTTP")

'向指定的URL发送Post消息

h.open "POST", "http://localhost/myService/test.asmx", False

h.setRequestHeader "Content-Type", "text/xml"

h.setRequestHeader "SOAPAction", "http://tempuri.org/myService/test/isNumner"

h.send (strxml)

While h.readyState <> 4

Wend

'显示返回的XML信息

str = h.responseText

'将返回的XML信息解析并且显示返回值

'Set x = createobject("MSXML2.DOMDocument")

' x.loadXML str



'str = x.childNodes(1).Text



response.write(str)



%>



3．在.net中

在.net中调用WebService就方便多了，没有必要自己写soap消息了，以上都是用XMLHTTP来发送WebService请求的，在.net只要添加了web引用，会自动为你创建一个代理类。然后使用代理类就像用自己定义的类一样方便。