XML Document Object Model (DOM)

 XML Document Object Model (DOM)

Develop a Windows Forms application that does following:

1.      Reads the sample .xml file (given above) and displays its contents in a Label control.

2.      Displays all the titles (for books) in a ListBox control.

 .      Deletes the book for the selected title from the ListBox. (use a delete button)

4.      Append a complete book element to the .xml file (use text boxes to enter values)

       Sample XML File

<?xml version="1.0"?>

  <bookstore>

    <book>

      <title>World History</title>

      <publisher>MSPress</publisher>

      <authors>

        <author>Carson</author>

      </authors>

    </book>

    <book>

      <title>C++ for Dummies</title>

      <publisher>Prentice Hall</publisher>

      <authors>

        <author>A. Levine</author>

        <author>B. Levine</author>

      </authors>

    </book>

    <book>

      <title>Cooking Tips</title>

      <publisher>Anaar Kali Publishers</publisher>

      <authors>

        <author>Shaista Alam</author>

      </authors>

    </book>

  </bookstore>

Code

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Xml;

namespace lab09vp

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        XmlDocument doc;

        XmlNodeList n_list;

        private void load()

        {

            tb_del.Items.Clear();

            doc = new XmlDocument();

            doc.Load("c:\\lab9.xml");

            string content = doc.OuterXml;

            content = content.Replace("><", ">\n<");

            lb_load.Text = content;

            n_list = doc.GetElementsByTagName("title");

            for (int i = 0; i < doc.DocumentElement.ChildNodes.Count; i++)

            {

                tb_del.Items.Add(n_list[i].InnerText);

            }

        }

        private void Form1_Load(object sender, EventArgs e)

        {

            load();

        }

        private void btn_del_Click(object sender, EventArgs e)

        {

            XmlNode node_to_del= n_list[tb_del.SelectedIndex].ParentNode;

            XmlNode root= doc.DocumentElement;

            root.RemoveChild(node_to_del);

            doc.Save("c:\\lab9.xml");

            load();

        }

        private void btn_append_Click(object sender, EventArgs e)

        {

            XmlElement add_element = doc.CreateElement("book");

            XmlElement ele_title = doc.CreateElement("title");

            ele_title.InnerText = textBox1.Text;

            XmlElement ele_publisher = doc.CreateElement("publisher");

            ele_publisher.InnerText = textBox2.Text;

            XmlElement ele_author = doc.CreateElement("author");

            ele_author.InnerText = textBox3.Text;

            XmlElement authors = doc.CreateElement("authors");

            authors.AppendChild(ele_author);

            add_element.AppendChild(ele_title);

            add_element.AppendChild(ele_publisher);

            add_element.AppendChild(authors);

            doc.DocumentElement.AppendChild(add_element);

            doc.Save("c:\\lab9.xml");

            load();

           

           

        }

    }

}

Screen Shot