Read Write and Update XML using LINQ Queries

I am going to take a Simple XML data and will show how to read write and Update it using LINQ.

Sample XML File:

<?xml version="1.0" encoding="utf-8"?>
<LumiaMobiles>
  <LumiaMobile>
    <ModelId>lumia550</ModelId>
    <Height>136.1 mm</Height>
    <Width>67.8 mm</Width>
    <Thickness>9.9 mm</Thickness>
    <Weight>141.9 g</Weight>
  </LumiaMobile>
  <LumiaMobile>
    <ModelId>lumia950</ModelId>
    <Height>145 mm</Height>
    <Width>73.2 mm</Width>
    <Thickness>8.2 mm</Thickness>
    <Weight>150 g</Weight>
  </LumiaMobile>
</LumiaMobiles>

Corresponding class for XML Data:

public class LumiaMobile
{
   public string ModelId { get; set; }
   public string Height { get; set; }
   public string Width { get; set; }
   public string Thickness { get; set; }
   public string Weight { get; set; }
}

Code to Write XML File

private void WriteLumiaMobilesDetails(List<LumiaMobile> lstLumiaMobiles)
{
    using (XmlWriter writer = XmlWriter.Create("LumiaMobiles2.xml"))
    {
        writer.WriteStartDocument();
        writer.WriteStartElement("LumiaMobiles");
        foreach (var mobile in lstLumiaMobiles)
        {
            writer.WriteStartElement("LumiaMobile");
            writer.WriteElementString("ModelId", mobile.ModelId);
            writer.WriteElementString("Height", mobile.Height);
            writer.WriteElementString("Width", mobile.Width);
            writer.WriteElementString("Thickness", mobile.Thickness);
            writer.WriteElementString("Weight", mobile.Weight);
            writer.WriteEndElement();
        }

        writer.WriteEndElement();
        writer.WriteEndDocument();
    }
}

Calling Write XML Data Method:

static void Main(string[] args)
{
    Program p = new Program();
    List<LumiaMobile> lstLumiaMobiles = new List<LumiaMobile>();
    lstLumiaMobiles.Add(new LumiaMobile
    {
        ModelId = "lumia550",
        Height = "136.1 mm",
        Width = "67.8 mm",
        Thickness = "9.9 mm",
        Weight = "141.9 g"
    });

    lstLumiaMobiles.Add(new LumiaMobile
    {
        ModelId = "lumia950",
        Height = "145 mm",
        Width = "73.2 mm",
        Thickness = "8.2 mm",
        Weight = "150 g"
    });
    p.WriteLumiaMobilesDetails(lstLumiaMobiles);
}

Code to Read XML Data:

public List<LumiaMobile> ReadLumiaMobilesDetails()
{
    List<LumiaMobile> lstLumiaMobiles = new List<LumiaMobile>();
    try
    {
        using (XmlReader xr = XmlReader.Create(@"LumiaMobiles.xml"))
        {
            XDocument xdoc = XDocument.Load(xr);
            var LumiaMobiles = xdoc.Descendants("LumiaMobiles").Descendants("LumiaMobile");
            foreach (var mobile in LumiaMobiles)
            {
                lstLumiaMobiles.Add(new LumiaMobile
                {
                    ModelId = Convert.ToString(mobile.Descendants("ModelId").FirstOrDefault().Value),
                    Height = Convert.ToString(mobile.Descendants("Height").FirstOrDefault().Value),
                    Width = Convert.ToString(mobile.Descendants("Width").FirstOrDefault().Value),
                    Thickness = Convert.ToString(mobile.Descendants("Thickness").FirstOrDefault().Value),
                    Weight = Convert.ToString(mobile.Descendants("Weight").FirstOrDefault().Value)
                });
            }
        }
    }
    catch (Exception)
    {

    }
    return lstLumiaMobiles;
}

Calling Read XML Data Method:

static void Main(string[] args)
{
   Program p = new Program();
   p.ReadLumiaMobilesDetails();
}

Code to Update XML Data:

private void UpdateXmlElementforMobile(string ModelId, string element, string elementValue)
{

    XDocument xdoc = XDocument.Load("LumiaMobiles.xml");
    var LumiaMobiles = xdoc.Descendants("LumiaMobile");
    foreach (var mobile in LumiaMobiles)
    {
        if (mobile.Descendants("ModelId").Any())
        {
            if (Convert.ToString(mobile.Descendants("ModelId").FirstOrDefault().Value) == ModelId)
            {
                mobile.Descendants(element).FirstOrDefault().Value = elementValue;
                xdoc.Save("LumiaMobiles.xml");
            }
        }
    }
}

Calling Update XML Data Method:

static void Main(string[] args)
{
   Program p = new Program();
   p.UpdateXmlElementforMobile("lumia950", "Height", "145.0 mm");
}

Complete Code is:

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

namespace XMLtoLINQ
{
    class Program
    {
        static void Main(string[] args)
        {
            Program p = new Program();
            p.ReadLumiaMobilesDetails();
            List<LumiaMobile> lstLumiaMobiles = new List<LumiaMobile>();
            lstLumiaMobiles.Add(new LumiaMobile
            {
                ModelId = "lumia550",
                Height = "136.1 mm",
                Width = "67.8 mm",
                Thickness = "9.9 mm",
                Weight = "141.9 g"
            });

            lstLumiaMobiles.Add(new LumiaMobile
            {
                ModelId = "lumia950",
                Height = "145 mm",
                Width = "73.2 mm",
                Thickness = "8.2 mm",
                Weight = "150 g"
            });

            p.WriteLumiaMobilesDetails(lstLumiaMobiles);

            p.UpdateXmlElementforMobile("lumia950", "Height", "145.0 mm");
        }

        private void UpdateXmlElementforMobile(string ModelId, string element, string elementValue)
        {

            XDocument xdoc = XDocument.Load("LumiaMobiles.xml");
            var LumiaMobiles = xdoc.Descendants("LumiaMobile");
            foreach (var mobile in LumiaMobiles)
            {
                if (mobile.Descendants("ModelId").Any())
                {
                    if (Convert.ToString(mobile.Descendants("ModelId").FirstOrDefault().Value) == ModelId)
                    {
                        mobile.Descendants(element).FirstOrDefault().Value = elementValue;
                        xdoc.Save("LumiaMobiles.xml");
                    }
                }
            }
        }

        private void WriteLumiaMobilesDetails(List<LumiaMobile> lstLumiaMobiles)
        {
            using (XmlWriter writer = XmlWriter.Create("LumiaMobiles2.xml"))
            {
                writer.WriteStartDocument();
                writer.WriteStartElement("LumiaMobiles");
                foreach (var mobile in lstLumiaMobiles)
                {
                    writer.WriteStartElement("LumiaMobile");
                    writer.WriteElementString("ModelId", mobile.ModelId);
                    writer.WriteElementString("Height", mobile.Height);
                    writer.WriteElementString("Width", mobile.Width);
                    writer.WriteElementString("Thickness", mobile.Thickness);
                    writer.WriteElementString("Weight", mobile.Weight);
                    writer.WriteEndElement();
                }

                writer.WriteEndElement();
                writer.WriteEndDocument();
            }
        }

        public List<LumiaMobile> ReadLumiaMobilesDetails()
        {
            List<LumiaMobile> lstLumiaMobiles = new List<LumiaMobile>();
            try
            {
                using (XmlReader xr = XmlReader.Create(@"LumiaMobiles.xml"))
                {
                    XDocument xdoc = XDocument.Load(xr);
                    var LumiaMobiles = xdoc.Descendants("LumiaMobiles").Descendants("LumiaMobile");
                    foreach (var mobile in LumiaMobiles)
                    {
                        lstLumiaMobiles.Add(new LumiaMobile
                        {
                            ModelId = Convert.ToString(mobile.Descendants("ModelId").FirstOrDefault().Value),
                            Height = Convert.ToString(mobile.Descendants("Height").FirstOrDefault().Value),
                            Width = Convert.ToString(mobile.Descendants("Width").FirstOrDefault().Value),
                            Thickness = Convert.ToString(mobile.Descendants("Thickness").FirstOrDefault().Value),
                            Weight = Convert.ToString(mobile.Descendants("Weight").FirstOrDefault().Value)
                        });
                    }
                }
            }
            catch (Exception)
            {

            }
            return lstLumiaMobiles;
        }
    }

    public class LumiaMobile
    {
        public string ModelId { get; set; }
        public string Height { get; set; }
        public string Width { get; set; }
        public string Thickness { get; set; }
        public string Weight { get; set; }
    }
}