Need to add new items under the existing XML file using C#

Question

I need to add new items in the existing file using C#, Could any please provide best logic to do it in using C#. Below is my XML File (Input)=

<?xml version="1.0" encoding="UTF-8"?>
<FileSetting xmlns="http://ltsc.ieee.org/xsd/LOM" xmlns:xs="http://www.M1.org/2001/XMLSchema">
   <Files>
      <File Section="Section 1" Method="Complete" Location="Total 1">
         <Columns>
            <Profile Method="DataCollection" Item="All" />
         </Columns>
      </File>
      <!--  <File Section="Section 2" Method="Complete" Location="Total 2">
    <Columns>
      <Profile Method= "DataCollection" Item="All"/>
     </Columns>
  </File> -->
      <File Section="Section 3" Method="Complete" Location="Main">
         <Columns>
            <Profile Method="DataCollection" Item="All" />
         </Columns>
      </File>
   </Files>
</FileSetting>

Here in my existing XML file I want to add new File item under the Files, so I am expecting output as=

<?xml version="1.0" encoding="UTF-8"?>
<FileSetting xmlns="http://ltsc.ieee.org/xsd/LOM" xmlns:xs="http://www.M1.org/2001/XMLSchema">
   <Files>
      <File Section="Section 1" Method="Complete" Location="Total 1">
         <Columns>
            <Profile Method="DataCollection" Item="All" />
         </Columns>
      </File>
      <!--  <File Section="Section 2" Method="Complete" Location="Total 2">
    <Columns>
      <Profile Method= "DataCollection" Item="All"/>
     </Columns>
  </File> -->
      <File Section="Section 3" Method="Complete" Location="Main">
         <Columns>
            <Profile Method="DataCollection" Item="All" />
         </Columns>
      </File>
      <File Section="Section 4" Method="NotComplete" Location="Test5">
         <Columns>
            <Profile Method="DataCollecter" Item="Partial" />
         </Columns>
      </File>
   </Files>
</FileSetting>

Could anyone please provide the best logic to do it in C#?

Thanks in Advance

Answer 1

Use 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);
            XNamespace ns = doc.Root.GetDefaultNamespace();

            XElement files = doc.Descendants(ns + "Files").FirstOrDefault();

            XElement newFile = new XElement(ns + "File", new object[] {
                new XAttribute("Section", "Section 4"),
                new XAttribute("Method", "NotComplete"),
                new XAttribute("Location", "Test5"),
                new XElement(ns + "Columns", new object[] {
                    new XElement("Profile", new object[] {
                        new XAttribute("Method", "DataCollecter"),
                        new XAttribute("Item", "Partial")
                    })
                })
            });

            files.Add(newFile);
        }
    }
}