今天采用Xpath讀取Xml節(jié)點(diǎn)，怎么都讀不出。

問(wèn)題分析：

錯(cuò)誤代碼如下：

      XmlDocument xmlD = new XmlDocument();
      xmlD.PreserveWhitespace = true;
      xmlD.LoadXml(xStr);
      xmlD.SelectNodes(@"job-scheduling-data/schedule/job");

經(jīng)排查 dotnet 文檔，發(fā)現(xiàn)代碼編寫(xiě)沒(méi)有問(wèn)題。文檔描述如下：

文檔示例如下：
示例代碼：

using System;
using System.IO;
using System.Xml;

public class Sample
{
  public static void Main()
  {

      XmlDocument doc = new XmlDocument();
      doc.Load("booksort.xml");

      //Create an XmlNamespaceManager for resolving namespaces.
      XmlNamespaceManager nsmgr = new XmlNamespaceManager(doc.NameTable);
      nsmgr.AddNamespace("bk", "urn:samples");

      //Select and display the value of all the ISBN attributes.
      XmlNodeList nodeList;
      XmlElement root = doc.DocumentElement;
      nodeList = root.SelectNodes("/bookstore/book/@bk:ISBN", nsmgr);
      foreach (XmlNode isbn in nodeList){
        Console.WriteLine(isbn.Value);
      }
   }
}

示例XML：

<?xml version="1.0"?>
<!-- A fragment of a book store inventory database -->
<bookstore xmlns:bk="urn:samples">
  <book genre="novel" publicationdate="1997" bk:ISBN="1-861001-57-8">
    <title>Pride And Prejudice</title>
    <author>
      <first-name>Jane</first-name>
      <last-name>Austen</last-name>
    </author>
    <price>24.95</price>
  </book>
  <book genre="novel" publicationdate="1992" bk:ISBN="1-861002-30-1">
    <title>The Handmaid's Tale</title>
    <author>
      <first-name>Margaret</first-name>
      <last-name>Atwood</last-name>
    </author>
    <price>29.95</price>
  </book>
  <book genre="novel" publicationdate="1991" bk:ISBN="1-861001-57-6">
    <title>Emma</title>
    <author>
      <first-name>Jane</first-name>
      <last-name>Austen</last-name>
    </author>
    <price>19.95</price>
  </book>
  <book genre="novel" publicationdate="1982" bk:ISBN="1-861001-45-3">
    <title>Sense and Sensibility</title>
    <author>
      <first-name>Jane</first-name>
      <last-name>Austen</last-name>
    </author>
    <price>19.95</price>
  </book>
</bookstore>

自己程序采用Xml：
文章來(lái)源地址http://www.zghlxwxcb.cn/news/detail-691316.html

結(jié)論：?jiǎn)栴}原因：最后用文檔示例與自己代碼比較發(fā)現(xiàn)上命名空間導(dǎo)致**

修改后正確代碼

     string xStr = File.ReadAllText(path.Trim());
                xStr = xStr.Replace("<?xml version=\"1.0\" encoding=\"utf-8\"?>", "");
                xStr = xStr.Replace("xmlns=\"http://quartznet.sourceforge.net/JobSchedulingData\"", "");
                xStr = xStr.Replace("xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\"", "");
                XmlDocument xmlD = new XmlDocument();
                xmlD.PreserveWhitespace = true;
                xmlD.LoadXml(xStr);
                XmlNodeList jobNodeList = xmlD.SelectNodes(@"job-scheduling-data/schedule/job");

到了這里，關(guān)于XmlDocument.SelectNodes 不起作用的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！