XML查询问题

Question

我正在尝试从 C# 编码的 xml 文件中获取一些数据。

如果以下claim-ib-info节点不包含已撤回，如何获取claim节点的数据节点。

如果您不清楚我的问题，请告诉我。

我对 XML 不太了解，提前致谢。

<info>
    <claim kind="national" sequence="1">
        <country>UK</country>
        <number>66</number>
        <date>20080602</date>
    </claim>
    <claim-ib-info>
        <received-at>
            <date>20090610</date>
        </received-at>
    </claim-ib-info>


    <claim kind="national" sequence="2">
        <country>US</country>
        <number>125</number>
        <date>20080501</date>
    </claim>
    <claim-ib-info>
        <withdrawn>
            <date>20100721</date>
        </withdrawn>
    </claim-ib-info>


    <claim kind="national" sequence="3">
        <country>TH</country>
        <number>61</number>
        <date>20090316</date>
    </claim>
    <claim-ib-info>
        <received-at>
            <date>20090610</date>
        </received-at>
    </claim-ib-info>


    <claim kind="national" sequence="4">
        <country>MY</country>
        <number>66</number>
        <date>20090209</date>
    </claim>
    <claim-ib-info>
        <withdrawn>
            <date>20101221</date>
        </withdrawn>
    </claim-ib-info>
</info>

Answer 1

尝试学习和使用Linq to XML。

var list = from ele in XDocument.Load(@"c:\files.xml").Descendants("claim-ib-info")
                    where ele.Element("withdrawn")!=null
                   select ele.PreviousNode  ;

foreach (var t in list)
{
    Console.WriteLine(t);
}

Answer 2

我建议首先学习 XPath。 XPath（与 LINQ 不同）是一种开放技术；您可以在任何平台上使用任何支持 XML 的语言和库：

http: //msdn.microsoft.com/en-us/library/d271ytdx.aspx