我想优化我的javascript但是我遇到了一些麻烦。我正在使用XSLT转换,其基本思想是获取XML的一部分并将其子查询,以便调用更快,更便宜。这是XML的一部分:
<suite>
<table id="spis" runat="client">
<rows>
<row id="spis_1">
<dispatch>'2008', '288627'</dispatch>
<data col="urGod">
<title>2008</title>
<description>Ur. god.</description>
</data>
<data col="rbr">
<title>288627</title>
<description>Rbr.</description>
</data>
...
</rows>
</table>
</suite>
在页面中,这是适用于此的javascript:
// this is my global variable for getting the elements so I just get the most
// I can in one call
elemCollection = iDom3.Table.all["spis"].XML.DOM.selectNodes("/suite/table/rows/row").context;
//then I have the method that uses this by getting the subresults from elemCollection
//rest of the method isn't interesting, only the selectNodes call
_buildResults = function (){
var _RowList = elemCollection.selectNodes("/data[@col = 'urGod']/title");
var tmpResult = [''];
var substringResult="";
for (i=0; i<_RowList.length; i++) {
tmpResult.push(_RowList[i].text,iDom3.Global.Delimiter);
}
...
//this variant works
elemCollection = iDom3.Table.all["spis"].XML.DOM
_buildResults = function (){
var _RowList = elemCollection.selectNodes("/suite/table/rows/row/data[@col = 'urGod']/title");
var tmpResult = [''];
var substringResult="";
for (i=0; i<_RowList.length; i++) {
tmpResult.push(_RowList[i].text,iDom3.Global.Delimiter);
}
...
问题是,我找不到使用子结果来获得我需要的方法。
答案 0 :(得分:2)
您正尝试从集合中选择节点(NodeList)。
elemCollection.selectNodes("/data[@col = 'urGod']/title");
尝试从集合中选择单个项目(Node)中的节点,例如:
elemCollection[i].selectSingleNode("/data[@col = 'urGod']/title")
添加到您的代码中(没有数据验证,并假设我们想要col属性的第一个匹配项):
_buildResults = function (){
var tmpResult = [''];
var substringResult="";
for (i=0; i<elemCollection.length; i++) {
tmpResult.push(elemCollection[i].selectSingleNode("/data[@col = 'urGod']/title").text,iDom3.Global.Delimiter);
}
答案 1 :(得分:1)
您需要迭代elemCollection列表,然后执行以下查询:
./data[@col = 'urGod']/title