xml - linq xml选择节点

Question

我有xml文件：

<users>
        <user_tuple>
          <userid>U01</userid>
          <code>
            <name>Tom Jones</name>
          </code>
          <rating>B</rating>
        </user_tuple>
        <user_tuple>
          <userid>U02</userid>
          <code>
             <name>Mary Doe</name>
          </code>
          <rating>A</rating>
        </user_tuple>
        <user_tuple>
          <userid>U03</userid>
          <code>
            <name>Dee Linquent</name>
          </code>
         <rating>D</rating>
        </user_tuple>

如何仅选择 Element("userid").value=="U01" 和 Element("name").Value=="Tom Jones" 等的那些（以及所有子节点/元素），即我想要结果：

 <user_tuple>
      <userid>U01</userid>
      <code>
        <name>Tom Jones</name>
      </code>
      <rating>B</rating>
    </user_tuple>

我正在使用 C#

public void searchInfo(string rootNode, string Element1Name, string Element2Name,  string Element1Val, string Element2Val){ 

////// Select rootNode and all descend nodes

    var res = root.Elements("rootNode")
       .Where(
          x => 
             (string)x.Element(Element1Name) == Element1Val&&
             (string)x.Element(Element2Name) == Element2Val)
       ).ToList();
///////////    

foreach (var node in res){
 Debug.Writeline("Name {0} Value {1}", node.Name, node.Value)

}

例子：

searchInfo("rootNode","userid","code", "U01", "Tom Jones")

res =  <userid>U01</userid>
          <code>
            <name>Tom Jones</name>
          </code>
          <rating>B</rating>

and result:
userid U01
name Tom Jones 
rating B

那可能吗？

Answer 1

try this

var doc = XDocument.Parse(s);
var res = doc.Elements("users").Elements("user_tuple")
   .Where(
      x => 
         (string)x.Element("userid") == "U01" &&
         (string)x.Element("code").Element("name") == "TomJones")
   ).ToList();

Or use XPath:

var res = doc.XPathSelectElements("
                users/user_tuple[userid='U01' and code[name='TomJones']]
          ").ToList();