Create and Update XML File

Introduction:

Xml stands for Extensible Markup Language. All the Tags/Elements of Xml are user defined that’s why it is Easy to Create and understand.

Important:

To Create XML we have used following Class and Methods. XmlDocumant class is present under System.Xml namespace.

Classes:

• XmlDocument
• XmlDeclaration
• XmlElement

Methods:

• CreateElement()
• AppendChild()
  

Example:

In Example, we have Created XML having 2 Element Id & Name using Windows Application.

Open Visual Studio and Design a form like this:



Add Following Codes on “Save” Button_click :

namespace Xml_Proc
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private XmlElement root;
        public string path = @"C:\Users\kundan\Desktop\Sample.xml";
        XmlDocument doc = new XmlDocument();

        private void button1_Click(object sender, EventArgs e)
        {
            if (!File.Exists(path))
            {
                XmlDeclaration declaration = doc.CreateXmlDeclaration("1.0", "UTF-8", "yes");
                root = doc.CreateElement("Employee");
                XmlElement Emp = doc.CreateElement("Emp");
                XmlElement ID = doc.CreateElement("ID");
                XmlElement NAME = doc.CreateElement("NAME");

                ID.InnerText = textBox1.Text;
                NAME.InnerText = textBox2.Text;

                doc.AppendChild(declaration);
                doc.AppendChild(root);
                root.AppendChild(Emp);
                Emp.AppendChild(ID);
                Emp.AppendChild(NAME);

                doc.Save(path);

                MessageBox.Show("XML Created && Data has been Inserted");
            }
            else
            {
                doc = new XmlDocument();
                doc.Load(path);
                root = doc.DocumentElement;
                XmlElement Emp = doc.CreateElement("Emp");
                XmlElement ID = doc.CreateElement("ID");
                XmlElement NAME = doc.CreateElement("NAME");
                ID.InnerText = textBox1.Text;
                NAME.InnerText = textBox2.Text;
                Emp.AppendChild(ID);
                Emp.AppendChild(NAME);
                root.AppendChild(Emp);
                doc.Save(path);
                MessageBox.Show("XML Updated");
            }
        }
    }
}

Output will look like: