如何使用C＃获取XML文件中的节点值

Question

我有一个XML文件，在此XML中，您可以看到RESPONSE_DATA标记。 这个标签还有一些内部标签。 我需要获取PERSON_DATA标记内的所有值。 我还需要在下面的xml文件中获取所有其他值。

<?xml version=\"1.0\" encoding=\"utf-16\"?>\r\n
<HUMAN_VERIFICATION xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
                    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <RESPONSE_DATA>
      <RESPONSE_STATUS>
         <ERROR>100</ERROR>
         <MESSAGE>successful</MESSAGE>
      </RESPONSE_STATUS>
      <CONTACT_NUMBER>3120202456011</CONTACT_NUMBER>
      <PERSON_DATA>
         <NAME>Alex</NAME>
         <DATE_OF_BIRTH>10-9-1982</DATE_OF_BIRTH>
         <BIRTH_PLACE>Washington</BIRTH_PLACE>
         <EXPIRY>2020-12-15</EXPIRY>
      </PERSON_DATA>
      <CARD_TYPE>idcard</CARD_TYPE>
   </RESPONSE_DATA>
</HUMAN_VERIFICATION>

Answer 1

我更喜欢使用Linq而不是Xml 。

var results = doc.Descendants("PERSON_DATA")      // Flatten the hierarchy and look for PERSON_DATA                
    .Select(x=> new 
            {
                NAME = (string)x.Element("NAME"),
                DATE_OF_BIRTH = (string)x.Element("DATE_OF_BIRTH"),
                BIRTH_PLACE = (string)x.Element("BIRTH_PLACE"),
                EXPIRY = (string)x.Element("EXPIRY"),
            });

检查Demo

Answer 2

您可以尝试使用此代码，这可能对您有所帮助。

XmlDocument newdoc = new XmlDocument();
newdoc.InnerXml = " <?xml version=\"1.0\" encoding=\"utf-16\"?><HUMAN_VERIFICATION><RESPONSE_DATA><RESPONSE_STATUS><ERR>100</ERROR><MESSAGE>successful</MESSAGE></RESPONSE_STATUS><CONTACT_NUMBER>3120202456011</ CONTACT _NUMBER><PERSON_DATA><NAME>Alex</NAME><DATE_OF_BIRTH>10-9-1982</DATE_OF_BIRTH><BIRTH_PLACE>Washington</BIRTH_PLACE><EXPIRY>2020-12-15</EXPIRY></PERSON_DATA><CARD_TYPE>idcard</CARD_TYPE></RESPONSE_DATA></HUMAN_VERIFICATION>";

var selectnode = "HUMAN_VERIFICATION/RESPONSE_DATA/PERSON_DATA";
var nodes = newdoc.SelectNodes(selectnode);
foreach (XmlNode nod in nodes)
{
    string name   = nod["NAME"         ].InnerText;
    string dob    = nod["DATE_OF_BIRTH"].InnerText;
    string place  = nod["BIRTH_PLACE"  ].InnerText;
    string expiry = nod["EXPIRY"       ].InnerText;
    Console.WriteLine("Person: {0} {1} {2} {3}", name, dob, place, expiry);
}

Answer 3

使用System.Xml.Linq确实非常容易和直观。

var xml = "<?xml version=\"1.0\" encoding=\"utf-16\"?>\r\n<HUMAN_VERIFICATION xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">\r\n  <RESPONSE_DATA>\r\n    <RESPONSE_STATUS>\r\n      <ERROR>100</ERROR>\r\n      <MESSAGE>successful</MESSAGE>\r\n    </RESPONSE_STATUS>\r\n    <CONTACT_NUMBER>3120202456011</CONTACT_NUMBER>\r\n    <PERSON_DATA>\r\n      <NAME>Alex</NAME>\r\n     <DATE_OF_BIRTH>10-9-1982</DATE_OF_BIRTH>\r\n      <BIRTH_PLACE>Washington</BIRTH_PLACE>\r\n      <EXPIRY>2020-12-15</EXPIRY>\r\n    </PERSON_DATA>\r\n    <CARD_TYPE>idcard</CARD_TYPE>\r\n  </RESPONSE_DATA>\r\n</HUMAN_VERIFICATION>";
var document = XDocument.Parse(xml);
var name = document.Element("HUMAN_VERIFICATION").Element("RESPONSE_DATA").Element("PERSON_DATA").Element("NAME").Value;

要么

var personData = document.Element("HUMAN_VERIFICATION").Element("RESPONSE_DATA").Element("PERSON_DATA").Elements().ToDictionary(e => e.Name.ToString(), e => e.Value);