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


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