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XML Document Loading

Posted on 2006-06-11
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Last Modified: 2010-04-16
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using MSXML2;

namespace ManipulateXML
{
    public partial class Form1 : Form
    {
        private DOMDocument40 doc;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string search = listBox1.SelectedItem.ToString();
            IXMLDOMNode nd = doc.selectSingleNode("bookstore/book[@ISBN=' " + search + " ' ]");
            MessageBox.Show(nd.text);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            doc = new DOMDocument40();
            doc.load("books.xml");
            IXMLDOMNodeList nodes;
            nodes = doc.selectNodes("bookstore/book");
            IXMLDOMNode node = nodes.nextNode();

            while (node != null)
            {
                listBox1.Items.Add(node.attributes.getNamedItem("ISBN").text);
                node = nodes.nextNode();
            }
        }
    }
}

this is a pretty simple code to understand. Button click loads an XML document called books.xml and I try to get information about the ISBN of all book nodes.
I compile and it compiles but on button click nothing happens. When i ran debugger I saw that 'while (node != null ' is a false statement. Please help
0
Comment
Question by:deersuper
  • 2
4 Comments
 
LVL 13

Expert Comment

by:dungla
ID: 16883089
Please paste your xml file here
0
 
LVL 13

Expert Comment

by:dungla
ID: 16883093
And you can use System.XML instead of MSXML2 if no special purpose.
0
 
LVL 2

Author Comment

by:deersuper
ID: 16883580
<?xml version="1.0" encoding="utf-8" ?>
<bookstore>
  <book genre="autobiography" publicationdate="1981" ISBN="1-816003-11-0">
    <title>title 1</title>
    <author>
      <first-name>ben </first-name>
      <last-name>franklin</last-name>
    </author>
    <price>899</price>
  </book>

  <book genre="novel" publicationdate="1967" ISBN="1-768503-11-0">
    <title>title 2</title>
    <author>
      <first-name>usman </first-name>
      <last-name>lakjai</last-name>
    </author>
    <price>299</price>
  </book>

  <book genre="sex" publicationdate="1381" ISBN="1-300618-11-0">
    <title>chudai</title>
    <author>
      <first-name>azam </first-name>
      <last-name>franklin</last-name>
    </author>
    <price>999</price>
  </book>
</bookstore>

the code book i am using specifically asks for using msxml2. thats why I used it !!!!!! thanks
0
 
LVL 52

Accepted Solution

by:
Carl Tawn earned 1000 total points
ID: 16883983
As mentioned earlier, you'd be better off simply including the System.Xml namespace rather than using the older MSXML2.

Then you can use something more like:

        private void button1_Click(object sender, EventArgs e)
        {
            doc = new XmlDocument();
            doc.Load("C:\\Test.xml");

            XmlNodeList nodes = doc.SelectNodes("bookstore/book");

            foreach (XmlNode node in nodes)
                listBox1.Items.Add(node.Attributes["ISBN"].InnerText);
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            string search = ((ListBox)sender).SelectedItem.ToString();
            XmlNode nd = doc.SelectSingleNode("bookstore/book[@ISBN='" + search + "']");

            MessageBox.Show(nd.InnerText);
        }
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