从Xml文件中提取值

本文关键字:提取 文件 Xml | 更新日期: 2023-09-27 18:22:02

我正试图从xml文件中提取以下值:--xml文件表示如下:

 <ENVELOPE_CONTENT>
   <DOCUMENTS>
    <DOCUMENT>
      <IDX>1529</IDX> 
      <ENTITY_PRIORITY>5</ENTITY_PRIORITY> 
      <CLD_COD>MAGAZINE</CLD_COD> 
      <CLD_DESC>Revues, magazine</CLD_DESC> 
      <CATEGORY>OTHER</CATEGORY> 
      <TIF_FILENAME>revues, magazine_1529_si.tif</TIF_FILENAME> 
      <COMMENT /> 
      <REJECT_MESSAGES /> 
      <PAGES>
       <PAGE>
         <PAGIDX>3375</PAGIDX> 
         <POSITION>1</POSITION> 
         <TIFNAME>87771593-2FD4-4803-8736-E2C1A898A96B_002.tif</TIFNAME> 
         <JPEGNAME>87771593-2fd4-4803-8736-e2c1a898a96b_001.jpg</JPEGNAME> 
       </PAGE>
       <PAGE>
        <PAGIDX>3376</PAGIDX> 
        <POSITION>2</POSITION> 
        <TIFNAME>87771593-2FD4-4803-8736-E2C1A898A96B_004.tif</TIFNAME> 
        <JPEGNAME>87771593-2fd4-4803-8736-e2c1a898a96b_003.jpg</JPEGNAME> 
      </PAGE>
      <PAGE>
        <PAGIDX>3377</PAGIDX> 
        <POSITION>3</POSITION> 
        <TIFNAME>87771593-2FD4-4803-8736-E2C1A898A96B_006.tif</TIFNAME> 
        <JPEGNAME>87771593-2fd4-4803-8736-e2c1a898a96b_005.jpg</JPEGNAME> 
      </PAGE>
      <PAGE>
        <PAGIDX>3378</PAGIDX> 
        <POSITION>4</POSITION> 
        <TIFNAME>87771593-2FD4-4803-8736-E2C1A898A96B_008.tif</TIFNAME> 
        <JPEGNAME>87771593-2fd4-4803-8736-e2c1a898a96b_007.jpg</JPEGNAME> 
      </PAGE>
      </PAGES>
     </DOCUMENT>
    </DOCUMENTS>  </ENVELOPE_CONTENT>

我正在使用以下c#代码来提取值

string xmlText = File.ReadAllText(f);
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlText);
XmlNodeList parentNode = doc.GetElementsByTagName("DOCUMENT");
List<string> p = new List<string>();
string classe = "";
foreach (XmlNode childrenNode in parentNode)
{
     classe = childrenNode.SelectSingleNode("CLD_COD").InnerText;
 }//end foreach

我设法从CLD_COD中提取了值,但我无法在"TIFNAME"中提取值

如何迭代节点以提取它们?

谢谢。

从Xml文件中提取值

首先,使用较新的XML API Linq-2-XML(XLinq),这要容易得多。

var root = XElement.Parse(xmlText);  // or directly .Load(fileName)
List<string> tifNames = root.Descendants("TIFNAME").Select(e => e.Value);

您可以使用LINQ到XML:

XDocument xdoc = XDocument.Load(f);
var cldCod = (string)xdoc.Descendants("CLD_COD").FirstOrDefault();
var names = from p in xdoc.Descendants("PAGE")
            select (string)p.Element("TIFNAME");

另一个选项是XPath扩展。您可以指定元素的确切路径以避免整个xml查找:

var root = xdoc.Root;
var cldCod = (string)root.XPathSelectElement("DOCUMENTS/DOCUMENT/CLD_COD");
var names = from n in root.XPathSelectElements("DOCUMENTS/DOCUMENT/PAGES/PAGE/TIFNAME")
            select (string)n;

您也可以尝试

        string xmlText = File.ReadAllText("C:''Users''virens''Desktop''Testxml.xml");
        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xmlText);
        XmlNodeList parentNode = doc.GetElementsByTagName("DOCUMENT");
        IEnumerator testnodes = parentNode[0].ChildNodes.GetEnumerator();
        List<string> p = new List<string>();
        string classe = "";
        while (testnodes.MoveNext())
        {
            XmlNode node = (XmlNode)testnodes.Current;
            if (node.Name == "TIF_FILENAME")
            {
                Console.WriteLine("Yai I got it");
                Console.WriteLine(node.InnerText);
            }
        } 

如果你真的必须使用旧的XmlDocument,你可以尝试这样的方法:

XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlText);
XmlNodeList xn = doc.SelectNodes("/ENVELOPE_CONTENT/DOCUMENTS/DOCUMENT/PAGES/PAGE/TIFNAME");
foreach (XmlNode xnode in xn)
{                   
    //extract values here
    Console.WriteLine(xnode.InnerText);
}