小于、大于、等于在 XPath 中没有按预期工作 [英] Less than, greater than, equal to not working as expected in XPath
问题描述
这是我的 xml 文件:-
<产品><product_id value="1"><tab_id value="351"><tab_name value="test1"/><dist_map value="5"/></tab_id></product_id><product_id value="2"><tab_id value="352"><tab_name value="test2"/><dist_map value="3"/></tab_id></product_id></产品>这是我的 xpath:-
var xPath = '//*[local-name() = "'+elName+'" and '+value+' and '+ value +' '+ls+' contains(concat(@value,","),"'+value+',") 和 '+' translate(@value," -:","")]'+'/../../@value';我有三个按钮和两个文本框，代码是:
<头><script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script><脚本>var xml;$.get("xml_converted.xml",空值，功能(数据){xml = 数据；},xml");函数 get_node(ls){var elName = $('#select').val();var value = $('#value').val();var xPath = '///*[local-name() = "'+elName+'" and '+value+' and '+ value +' '+ls+' contains(concat(@value,","),"'+value+',") 和 '+' translate(@value," -:","")]'+'/../../@value';var iterator = xml.evaluate(xPath, xml.documentElement, null,XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null);var thisNode = iterator.iterateNext();var str = '';而(这个节点){如果(字符串){str += ', ';}str += thisNode.textContent;thisNode = iterator.iterateNext();}$("#result").text(str);}<身体><input type="text" id="select"><input type="text" id="value"><input type="button" name="button" value="小于" onclick="get_node('<')"></input><input type="button" name="button" value="Grater than" onclick="get_node('>')"></input><input type="button" name="button" value="Equal" onclick="get_node('=')"></input><div id="结果"></html>
使用此代码 o/p 是:-
我在第一个文本框中输入 dist_map
在第二个文本框 3(它的 dist_map 属性值)
然后点击小于按钮它不给出任何输出
如果单击大于按钮，则它会同时显示 1,2(其 product_id 属性值)
这不完美吗.
这里 o/p 只有 1(它的 product_id 属性值) bcoz 3 小于 5
如果单击等于按钮，则可以完美运行 2(其 product_id 属性值)b'coz 两个文本框值在 xml 文件中都匹配
这里只有在我的 xpath 或参数传递中的问题，例如 (<, >)
请检查我的这个问题并帮助我解决这个问题...
谢谢
我真的不明白你试图通过调用 contains、concat 来达到什么目的和 translate 在您的 XPath 表达式中.但是，如果您只是想列出 dist_map 值小于、等于或大于给定值的产品，则应使用以下方法:
var xPath = '//*[local-name() = "' + elName + '" and @value ' + ls + ' ' + value+ ']/../../@value';这将创建如下表达式:
//*[local-name() = "dist_map" and @value >3]/../../@value'请注意，这不会验证输入.因此，例如，如果输入的值不是数字，则可能会导致无效的 XPath 表达式.
this is my xml file:-
<products>
<product_id value="1">
<tab_id value="351">
<tab_name value="test1"/>
<dist_map value="5"/>
</tab_id>
</product_id>
<product_id value="2">
<tab_id value="352">
<tab_name value="test2"/>
<dist_map value="3"/>
</tab_id>
</product_id>
</products>
this is my xpath:-
var xPath = '//*[local-name() = "'+elName+'" and '+value+' and '+ value +' '+ls
+' contains(concat(@value,","),"'+value+',")and '+
' translate(@value," -:","")]'+'/../../@value';
i have three buttons and two text-boxes, code is:
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script>
var xml;
$.get(
"xml_converted.xml",
null,
function (data) {
xml = data;
},
"xml"
);
function get_node(ls)
{
var elName = $('#select').val();
var value = $('#value').val();
var xPath = '//*[local-name() = "'+elName+'" and '+value+' and '+ value +' '+ls
+' contains(concat(@value,","),"'+value+',")and '+
' translate(@value," -:","")]'+'/../../@value';
var iterator = xml.evaluate(xPath, xml.documentElement, null,
XPathResult.UNORDERED_NODE_ITERATOR_TYPE, null);
var thisNode = iterator.iterateNext();
var str = '';
while (thisNode) {
if (str) {
str += ', ';
}
str += thisNode.textContent;
thisNode = iterator.iterateNext();
}
$("#result").text(str);
}
</script>
</head>
<body>
<input type="text" id="select">
<input type="text" id="value">
<input type="button" name="button" value="Less than" onclick="get_node('<')"></input>
<input type="button" name="button" value="Grater than" onclick="get_node('>')"></input>
<input type="button" name="button" value="Equal" onclick="get_node('=')"></input>
<div id="result">
</div>
</body>
</html>
with this code o/p is:-
i am enter in first textbox dist_map
in second textbox 3(its dist_map attribute value)
then click on less-than button its not give any output
if click on grater-than button then its display both 1,2(its product_id attribute value)
is this not perfect o/p.
here o/p is only 1(its product_id attribute value) bcoz 3 is less than to 5
and if click on equal to button then work perfect 2(its product_id attribute value)b'coz both textbox value is match in xml file
here only problem with in my xpath or argument pass in button like (<, >)
please check my this question and help to solve me this...
thanks
I don't really understand what you are trying to achieve with the calls to contains, concat and translate in your XPath expression. But if you simply want to list products whose dist_map value is less than, equal, or greater than a given value, the following should work:
var xPath = '//*[local-name() = "' + elName + '" and @value ' + ls + ' ' + value
+ ']/../../@value';
This will create expressions like:
//*[local-name() = "dist_map" and @value > 3]/../../@value'
Note that this doesn't validate the input. So it may result in an invalid XPath expression if, for example, the entered value isn't a number.
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