sort objects in XML and write back into new XML file using C#, LINQ

Question

I have below XML file, and want to order the objects based on Revision Node and then write ordered objects back into XML file. I have tried LINQ but no luck

 <?xml version="1.0" encoding="utf-8"?>
<v1:VNETList xmlns="http://www.xxxxxx.com/NET/eeim" xmlns:v1="http://www.xxxxxx.com/NET/List">
    <Objects> 
         <ID>00-0000-PPP-0001 Template</ID>
        <Object>
          <ID>00-0000-PPP-0001</ID>
           <Revision>2.0</Revision>
          <Name>600-0000-PPP-0001</Name>
          <ClassID>CL_Diagram</ClassID>
          <Association type="is fulfilled by">
            <Object>
              <ID>aae9d_application/pdf</ID>
              <Revision>2.0</Revision>
              <ClassID>FILE</ClassID>
              <Characteristic>
                <Name>InfoType</Name>
                <Value>pdf</Value>
              </Characteristic>                   
            </Object>
          </Association>
          <Characteristic>
            <Name>Status</Name>
            <Value>Historic</Value>
          </Characteristic>
        </Object>
        <Object>
          <ID>00-0000-PPP-0001</ID>
           <Revision>3.0</Revision>
          <Name>00-0000-PPP-0001</Name>
          <ClassID>CL_Diagram</ClassID>
          <Association type="is fulfilled by">
            <Object>
              <ID>090aaead_application/pdf</ID>
              <Revision>3.0</Revision>
              <ClassID>FILE</ClassID>                 
            </Object>
          </Association>
          <Characteristic>
            <Name>Transmittal Number</Name>
            <Value>111111</Value>
          </Characteristic>
          <Characteristic>
            <Name>Is PSI</Name>
            <Value>yes</Value>
          </Characteristic>         
        </Object>
        <Object>
          <ID>00-0000-PPP-0001</ID>          
          <Revision>1.0</Revision>
          <Name>00-0000-PPP-0001</Name>
          <ClassID>CL_Diagram</ClassID>
          <Characteristic>
            <Name>Is Confidential?</Name>
            <Value>False</Value>
          </Characteristic>
          <Characteristic>
            <Name>Is PSI</Name>
            <Value>yes</Value>
          </Characteristic>
        </Object>
    </Objects>

I want to order so revision 1 will come first, then 2 and the last will be three. Any help will be appreciated.

Answer 1

Try xml linq :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.Xml.Linq;

namespace ConsoleApplication1
{
    class Program
    {
        const string FILENAME = @"c:\temp\test.xml";
        static void Main(string[] args)
        {
            XDocument doc = XDocument.Load(FILENAME);

            XElement objects = doc.Descendants().Where(x => x.Name.LocalName == "Objects").FirstOrDefault();

            XElement firstObject = objects.Elements().Where(x => x.Name.LocalName == "Object").FirstOrDefault();
            XNamespace ns = firstObject.GetDefaultNamespace();

            List<XElement> sortedObjects = objects.Elements(ns + "Object")
                .OrderBy(x => (string)x.Descendants(ns + "Revision").FirstOrDefault())
                .ToList();

            objects.Elements(ns + "Object").Remove();

            objects.Add(sortedObjects);

            doc.Save(FILENAME);

        }
    }

}

Answer 2

you can sort the XML using LINQ

XDocument inputxml = XDocument.Load(inputfile);
XDocument outputxml = new XDocument(
                new XElement("Objects.Object",
                    from node in inputxml .Root.Elements()
                    orderby node.Element("Revision").Value
                    select node));
outputxml.Save(outputfile);