异步调用webservice返回responseXML为空的问题解决方法
2024-07-09 22:47:11
供稿:网友
先总结几个要领:
1)要熟悉javascript对XML文件的加载与操作;
DOM的XML操作可参考的示例:http://www.w3school.com.cn/xmldom/met_document_getelementsbytagname.asp
2)在IE下面还是要通过loadXML来转responseText;
3)xml加载后异步属性设置;
4)命名空间处理等问题;
下面上代码:
========ASPX前台代码========
代码如下:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div id="div1">
</div>
</form>
<p><input id="Button1" type="button" value="button" onclick="RequestWebService();" /></p>
<script type="text/javascript">
var sUsrAgent = navigator.userAgent;
var isIE = sUsrAgent.indexOf("MSIE") != -1;
var isIE6 = isIE && sUsrAgent.indexOf("MSIE 6.0") != -1;
var isIE7 = isIE && sUsrAgent.indexOf("MSIE 7.0") != -1;
var isFF = sUsrAgent.indexOf("Firefox") != -1;
var isOP = sUsrAgent.indexOf("Opera") != -1;
var isSF = sUsrAgent.indexOf("Safari") != -1 && sUsrAgent.indexOf("Chrome") == -1;
var isCH = sUsrAgent.indexOf("Chrome") != -1;
var xmlHttp;
function RequestWebService() {
//这是我们在第一步中创建的Web服务的地址
var URL = "http://localhost:3165/WebSite2/Service.asmx";
//在这处我们拼接
var data;
data = '<?xml version="1.0" encoding="utf-8"?>';
data = data + '<soap12:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://www.w3.org/2003/05/soap-envelope">';
data = data + '<soap12:Body>';
data = data + '<HelloWorld xmlns="http://tempuri.org/" />';
data = data + '</soap12:Body>';
data = data + '</soap12:Envelope>';
//创建异步对象
xmlHttp = GetXmlHttpObject();
xmlHttp.open("POST", URL, false);
if (xmlHttp.overrideMimeType) {
xmlHttp.overrideMimeType('text/xml');
}
xmlHttp.SetRequestHeader("Content-Type", "application/soap+xml");
xmlHttp.onreadystatechange = stateChanged;
xmlHttp.Send(data);
}
function stateChanged() {
if (xmlHttp.readyState == 4) {
if (xmlHttp.status == 200) {
alert(xmlHttp.getAllResponseHeaders());
alert(xmlHttp.responseText); // 这个有
//var xmlDoc = xmlHttp.responseXML; // 这个是空的,但下面会让它出来
var xmlDoc = loadXMLDoc();
xmlDoc.setProperty("SelectionNamespaces", 'xmlns:soap="http://www.w3.org/2003/05/soap-envelope" xmlns:ws="http://tempuri.org/" ');
// 这面这段是命名空间(包含显示与匿名的两种)处理方法,必须加上!
var node = xmlDoc.selectSingleNode("/soap:Envelope/soap:Body/ws:HelloWorldResponse/ws:HelloWorldResult"); //这边能有值就OK了,为了它前后消耗了1周时间!