JS操作XmlDocument 兼容操作 nsIDOMXPathEvaluator.createNS

分类：Javascript| 发布：camnprbubuol| 查看： | 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）

  [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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alert(this.xmlDoc.selectSingleNode("address").childNodes);

TypeError: this.xmlDoc.selectSingleNode is not a function

 

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SelectSingleNode: function (xmlDoc, elementPath) { 
        if (window.ActiveXObject) { 
            return xmlDoc.selectSingleNode(elementPath); 
        } 
        else { 
            var xpe = new XPathEvaluator(); 
            var nsResolver = xpe.createNSResolver(xmlDoc.ownerDocument == null ? xmlDoc.documentElement : xmlDoc.ownerDocument.documentElement);//报下边的错误 
            var results = xpe.evaluate(elementPath, xmlDoc, nsResolver, XPathResult.FIRST_ORDERED_NODE_TYPE, null); 
            return results.singleNodeValue; 
        } 
}

[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]

if (!window.ActiveXObject) { 

    Camnpr.ProvinceCityCountry.prototype.selectNodes = function (sXPath) { 

        var oEvaluator = new XPathEvaluator(); 

        var oResult = oEvaluator.evaluate(sXPath, this, null, XPathResult.ORDERED_NODE_ITERATOR_TYPE, null); 

        var aNodes = new Array(); 

        if (oResult != null) { 

            var oElement = oResult.iterateNext(); 

            while (oElement) { 

                aNodes.push(oElement); 

                oElement = oResult.iterateNext(); 

            } 

        } 

        return aNodes; 

    } 

    Camnpr.ProvinceCityCountry.prototype.selectSingleNode = function (sXPath) { 

        var oEvaluator = new XPathEvaluator(); 

        // FIRST_ORDERED_NODE_TYPE returns the first match to the xpath. 

        var oResult = oEvaluator.evaluate(sXPath, this, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null); 

        if (oResult != null) { 

            return oResult.singleNodeValue; 

        } else { 

            return null; 

        } 

    } 

}

//判断浏览器类型
    if (window.ActiveXObject) {    //在IE浏览器环境下
        xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
        xmlDoc.async = "false";
        xmlDoc.load(XMLPath);
        xmlNodes = xmlDoc.selectSingleNode("root").childNodes; 

        for (var i = 0; i < xmlNodes.length; i++) {
            var provinceNode = xmlNodes[i].getAttribute("name");
            var pOption = document.createElement("option");
            pOption.value = provinceNode;
            pOption.text = provinceNode;
            provinceDropDownList.add(pOption);
        } 

        InitCity();
    }
    else if (document.implementation && document.implementation.createDocument) {        //在非IE浏览器环境下
        xmlDoc = document.implementation.createDocument("", "", null);
        xmlDoc.load(XMLPath);
        xmlDoc.async = false; 

        xmlDoc.onload = function () {
            xmlNodes = xmlDoc.getElementsByTagName("province"); 

            for (var i = 0; i < xmlNodes.length; i++) {
                var provinceNode = xmlNodes[i].getAttribute("name");
                var pOption = document.createElement("option");
                pOption.innerHTML = provinceNode;
                pOption.setAttribute("value", provinceNode);
                provinceDropDownList.appendChild(pOption);
            } 

            /* 初始化下级列表的过程必须放在
            * XML文件的装载事件中，否则在初始化下
            * 级列表的函数中无法获取上级列表的值
            */
            InitCity();
        }
    }