How ways we can work with xml documents?

In .net we can work with xml files(documents) in 2 ways.

1.       Stream Model

2.       DOM Model(Documents Object model)

Stream Model:

In order to work with stream model we have to import a namespace

using System.Xml;

XmlReader,xmlWrtier are base classes to with xml files.and perform the the basic operations also.

Base Classes

XmlReader----xmlTextReader

XmlWriter----xmlTextWriter are derived classes.to read and write xml documents.

How to Read an xml file in .net?

using System.Xml;

we have an xml file in our drive as a physically like c:\\jobs.xml

Now I want to read that xml file so we have to use object of xmlTextReader.

EX:

Under ButtonClick:

XmlReader/XmlTextReader xtr = new XmlTextReader("C:\\jobs.xml");

while(xtr.Read())

{

if (xtr.NodeType == XmlNodeType.Element && xtr.Name == "job_desc")

{

xtr.Read();

ListBox1.Items.Add(xtr.Value.ToString());

}

}

How to Write an xml doucment to Physically?

Take Controls: TextBox1,TextBox2,CheckBox1,Button1 controls

Under the ButtonClick

XmlWriter/XmlTextWriter xmlw= new XmlTextWriter(@"c:\status.xml", null);

            xmlw.WriteStartDocument();

            xmlw.WriteStartElement("Roots");

            xmlw.WriteStartElement("tasks");

            xmlw.WriteElementString("programmid", TextBox1.Text);

            xmlw.WriteElementString("task", TextBox2.Text);

   if (CheckBox1.Checked)

   {

                xmlw.WriteElementString("status", "completed");

   }

  else

   xmlw.WriteElementString("status", "incompleted");

        //    xmlw.WriteEndElement();

//  buffer is fill automatically data moves to physical file             

         

  xmlw.WriteEndElement();

  xmlw.Flush();

  xmlw.Close();           

  Label1.Text = "Data is saved Succefully...";