JS操作XmlDocument 兼容操作 nsIDOMXPathEvaluator.createNS

分类：Javascript| 发布：camnprbubuol| 查看：1619 | 发表时间：2010/12/29

javascript在读取xml文档，并解析时，存在浏览器不兼容现象，下边就来看一下会出现什么错误，以及解决兼容的问题。（重点兼容FF）

`1`	`[Exception... "Not enough arguments [nsIDOMWindowInternal.alert]" nsresult: "0x80570001 (NS_ERROR_XPC_NOT_ENOUGH_ARGS)" location: "JS frame :: {$->>repath}WebUi/3Linkage/Area.js :: anonymous :: line 93" data: no]`

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1alert(this.xmlDoc.selectSingleNode("address").childNodes);
2 
3TypeError: this.xmlDoc.selectSingleNode is not a function

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01SelectSingleNode: function (xmlDoc, elementPath) { 
02        if (window.ActiveXObject) { 
03            return xmlDoc.selectSingleNode(elementPath); 
04        } 
05        else { 
06            var xpe = new XPathEvaluator(); 
07            var nsResolver = xpe.createNSResolver(xmlDoc.ownerDocument == null ? xmlDoc.documentElement : xmlDoc.ownerDocument.documentElement);//报下边的错误 
08            var results = xpe.evaluate(elementPath, xmlDoc, nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null); 
09            return results.singleNodeValue; 
10        } 
11}

`1`	`[Exception... "Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsIDOMXPathEvaluator.createNSResolver]" nsresult: "0x80070057 (NS_ERROR_ILLEGAL_VALUE)" location: "JS frame :: http://192.168.2.10/WebUi/3Linkage/Area.js :: anonymous :: line 80" data: no]`

01if (!window.ActiveXObject) { 
02 
03    Camnpr.ProvinceCityCountry.prototype.selectNodes = function (sXPath) { 
04 
05        var oEvaluator = new XPathEvaluator(); 
06 
07        var oResult = oEvaluator.evaluate(sXPath, this, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null); 
08 
09        var aNodes = new Array(); 
10 
11        if (oResult != null) { 
12 
13            var oElement = oResult.iterateNext(); 
14 
15            while (oElement) { 
16 
17                aNodes.push(oElement); 
18 
19                oElement = oResult.iterateNext(); 
20 
21            } 
22 
23        } 
24 
25        return aNodes; 
26 
27    } 
28 
29    Camnpr.ProvinceCityCountry.prototype.selectSingleNode = function (sXPath) { 
30 
31        var oEvaluator = new XPathEvaluator(); 
32 
33        // FIRST_ORDERED_NODE_TYPE returns the first match to the xpath. 
34 
35        var oResult = oEvaluator.evaluate(sXPath, this, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null); 
36 
37        if (oResult != null) { 
38 
39            return oResult.singleNodeValue; 
40 
41        } else { 
42 
43            return null; 
44 
45        } 
46 
47    } 
48 
49}

01//判断浏览器类型
02    if (window.ActiveXObject) {    //在IE浏览器环境下
03        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
04        xmlDoc.async = "false";
05        xmlDoc.load(XMLPath);
06        xmlNodes = xmlDoc.selectSingleNode("root").childNodes; 
07 
08        for (var i = 0; i < xmlNodes.length; i++) {
09            var provinceNode = xmlNodes[i].getAttribute("name");
10            var pOption = document.createElement("option");
11            pOption.value = provinceNode;
12            pOption.text = provinceNode;
13            provinceDropDownList.add(pOption);
14        } 
15 
16        InitCity();
17    }
18    else if (document.implementation && document.implementation.createDocument) {        //在非IE浏览器环境下
19        xmlDoc = document.implementation.createDocument("", "", null);
20        xmlDoc.load(XMLPath);
21        xmlDoc.async = false; 
22 
23        xmlDoc.onload = function () {
24            xmlNodes = xmlDoc.getElementsByTagName("province"); 
25 
26            for (var i = 0; i < xmlNodes.length; i++) {
27                var provinceNode = xmlNodes[i].getAttribute("name");
28                var pOption = document.createElement("option");
29                pOption.innerHTML = provinceNode;
30                pOption.setAttribute("value", provinceNode);
31                provinceDropDownList.appendChild(pOption);
32            } 
33 
34            /* 初始化下级列表的过程必须放在
35            * XML文件的装载事件中，否则在初始化下
36            * 级列表的函数中无法获取上级列表的值
37            */
38            InitCity();
39        }
40    }