如何使用C#来使用XPath返回元素值?

时间:2012-11-14 16:11:11

标签: c# xpath

我有一个xml文件的片段,如下所示:

    <?xml version="1.0" encoding="utf-8" standalone="yes"?>
<?xml-stylesheet type="text/xsl" href="wa_xml2html.xsl"?>
<computeraudit>
    <title>Computer Audit :: 11/13/2012 10:43:22 AM</title>
    <category title="Loaded Modules">
        <subcategory title="">
            <recordset title="">
                <fieldname>Name</fieldname>
                <fieldname>Version</fieldname>
                <fieldname>Modified</fieldname>
                <fieldname>Manufacturer</fieldname>
                <datarow>
                    <fieldvalue>XmlLite.dll</fieldvalue>
                    <fieldvalue>1.3.1000.0</fieldvalue>
                    <fieldvalue>7/13/2009 8:16:21 PM</fieldvalue>
                    <fieldvalue>Microsoft Corporation</fieldvalue>
                </datarow>              
                <datarow>
                    <fieldvalue>zip.dll</fieldvalue>
                    <fieldvalue>6.0.250.6</fieldvalue>
                    <fieldvalue>5/25/2011 8:30:12 AM</fieldvalue>
                    <fieldvalue>Sun Microsystems, Inc.</fieldvalue>
                </datarow>                      
            </recordset>
        </subcategory>
    </category>         
</computeraudit>    

我正在尝试使用C#XPath解析它并获取每个fieldvalue元素值。

c#代码如下所示:

        XPathNavigator nav;
        XPathDocument docNav;
        XPathNodeIterator NodeIter;
        String strExpression;
        docNav = new XPathDocument(@"C:\TEMP\WinAudit\test.xml");

        nav = docNav.CreateNavigator();

        strExpression = "/computeraudit/category[@title=\"Loaded Modules\"]/subcategory/recordset/datarow";

        NodeIter = nav.Select(strExpression);

        while (NodeIter.MoveNext())
        {
            Console.WriteLine(NodeIter.Current.Value);
        }
        Console.ReadLine();

它为每个数据行节点返回一行,并将所有fieldvalue元素值连接在一起。

如何返回每个fieldvalue元素的每个不同值?

2 个答案:

答案 0 :(得分:1)

您的选择器仅选择数据行元素。

尝试strExpression = "/computeraudit/category[@title=\"Loaded Modules\"]/subcategory/recordset/datarow/fieldvalue";

答案 1 :(得分:1)

将您的XPath表达式更改为:

"/computeraudit/category[@title=\"Loaded Modules\"]/subcategory/recordset/datarow/fieldvalue"