在c#中检索xml片段

本文关键字：xml 片段 检索 | 更新日期: 2023-09-27 18:18:00

我要为HB_Base元素检索xml片段的字符串表示形式。有谁能指出最好的方法吗? 

<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
  <s:Header>
    <a:Action s:mustUnderstand="1">http://www.as.com/ver/ver.IClaimver/Car</a:Action>
    <a:MessageID>urn:uuid:b22149b6-2e70-46aa-8b01-c2841c70c1c7</a:MessageID>
    <ActivityId CorrelationId="16b385f3-34bd-45ff-ad13-8652baeaeb8a" xmlns="http://schemas.microsoft.com/2004/09/ServiceModel/Diagnostics">04eb5b59-cd42-47c6-a946-d840a6cde42b</ActivityId>
    <a:ReplyTo>
      <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
    </a:ReplyTo>
    <a:To s:mustUnderstand="1">http://localhost/ver.Web/ver2011.svc</a:To>
  </s:Header>
  <s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <Car xmlns="http://www.as.com/ver">
      <carApplication>
        <HB_Base xsi:type="HB" xmlns="urn:core">
          <Header>
            <Advisor>
              <AdvisorLocalAuthorityCode>11</AdvisorLocalAuthorityCode>
              <AdvisorType>1</AdvisorType>
            </Advisor>
          </Header>
          <General>
            <ApplyForHB>yes</ApplyForHB>
            <ApplyForCTB>yes</ApplyForCTB>
            <ApplyForFSL>yes</ApplyForFSL>
            <ConsentSupplied>no</ConsentSupplied>
            <SupportingDocumentsSupplied>no</SupportingDocumentsSupplied>
          </General>
        </HB_Base>
      </carApplication>
    </Car>
  </s:Body>
</s:Envelope>

如何使用使用XmlNamespaceManager的XmlDocument.SelectSingleNode()。因为使用"/Envelope/Body/Car/carApplication/HB_Base"

在c#中检索xml片段

这样的xpath可能更好

您需要指定名称空间，使用XLinq，我们将使用XNamespace来帮助创建引用元素的XName:

var xdoc = XDocument.Load(xmlFile); // or .Parse(@"....")
XNamespace ns = @"urn:core";
// This is where the magic happens: ns + "HB_Base"
var hbBase = xdoc.Root.Descendants(ns + "HB_Base")
                      .SingleOrDefault();
if (hbBase == null) throw new InvalidOperationException("No such element");
var xml = hbBase.ToString();

使用XmlDocument和XmlNamespaceManager代替:

var xmlDoc = new XmlDocument();
xmlDoc.Load(xmlFile);
var nsManager = new XmlNamespaceManager(xmlDoc.NameTable);
nsManager.AddNamespace("s", @"http://www.w3.org/2003/05/soap-envelope");
nsManager.AddNamespace("c", @"http://www.as.com/ver");
nsManager.AddNamespace("h", @"urn:core");
var hbBase = xmlDoc.SelectSingleNode(
    @"/s:Envelope/s:Body/c:Car/c:carApplication/h:HB_Base");
if (hbBase == null) throw new InvalidOperationException("No such element");
var xml = hbBase.OuterXml;

我的建议是使用LINQ to XML:

using System.Linq;
using System.Xml.Linq; // requires a reference to System.Xml.Linq.dll
// . . .
// Load the XML (in this example, we use a file)
XDocument document = XDocument.Load("yourfile.xml");
// Initialize the namespace for the target element
XNamespace coreNamespace = "urn:core";
// Choose the first element below the root matching our target element
// (or return null if there is none)
XElement chosenElement = document.Root.Descendants(coreNamespace + "HB_Base").FirstOrDefault();
string xmlString = null;
if (chosenElement != null)
{
    // We found it, now get the string representation of the XML
    xmlString = chosenElement.ToString();
}

您可以使用XmlNode。OuterXml财产。

将其加载到xml文档中并选择节点，然后检索文本。

XmlDocument doc = new XmlDocument();
doc.loadXml( theString );
doc.SelectSingleNode( "/Envelope/Body/Car/carApplication/HB_Base" ).OuterXml;
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