XPath tutorial

count() function

Function count() counts the number of selected elements

Example 1

XPath Expression: Select elements which have two children BBB
//*[count(BBB)=2]
XML:
<?xml version="1.0">
     <AAA>
          <CCC>
               <BBB/>
               <BBB/>
               <BBB/>
          </CCC>
          <DDD>
               <BBB/>
               <BBB/>
          </DDD>
          <EEE>
               <CCC/>
               <DDD/>
          </EEE>
     </AAA>

Example 2

XPath Expression: Select elements which have 2 children

//*[count(*)=2]
XML:
<?xml version="1.0">
     <AAA>
          <CCC>
               <BBB/>
               <BBB/>
               <BBB/>
          </CCC>
          <DDD>
               <BBB/>
               <BBB/>
          </DDD>
          <EEE>
               <CCC/>
               <DDD/>
          </EEE>
     </AAA>

Example 3

XPath Expression: Select elements which have 3 children

//*[count(*)=3]
XML:
<?xml version="1.0">
     <AAA>
          <CCC>
               <BBB/>
               <BBB/>
               <BBB/>
          </CCC>
          <DDD>
               <BBB/>
               <BBB/>
          </DDD>
          <EEE>
               <CCC/>
               <DDD/>
          </EEE>
     </AAA>
C# code:
// BasicSyntax - /xpath/basicsyntax.cs
// Copyright 2003 by Johannes Roith

using System;
using System.Xml.XPath;

class BasicSyntax {
        static void Main() {
                
        }

}