Web view// if node type is white space. if ... ("Total Elements: ... this.dgLateXmlBound.CaptionText = "Snow report on " + strCaption;}

//java2s.com

About Sample Example 1

In this sample example, I read an XML file using XmlTextReader and call Read method to read its node one by one until end of file and display the contents to the console output.

Sample Example 1.

using System;

using System.Xml;

namespace ReadXml1

{

class Class1

{

static void Main(string[] args)

{

// Create an isntance of XmlTextReader and call Read method to read the file

XmlTextReader textReader = new XmlTextReader("C:\\books.xml");

textReader.Read();

// If the node has value

while (textReader.Read())

{

// Move to fist element

textReader.MoveToElement();

Console.WriteLine("XmlTextReader Properties Test");

Console.WriteLine("===================");

// Read this element's properties and display them on console

Console.WriteLine("Name:" + textReader.Name);

Console.WriteLine("Base URI:" + textReader.BaseURI);

Console.WriteLine("Local Name:" + textReader.LocalName);

Console.WriteLine("Attribute Count:" + textReader.AttributeCount.ToString());

Console.WriteLine("Depth:" + textReader.Depth.ToString());

Console.WriteLine("Line Number:" + textReader.LineNumber.ToString());

Console.WriteLine("Node Type:" + textReader.NodeType.ToString());

Console.WriteLine("Attribute Count:" + textReader.Value.ToString());

}

}

}

}


In this sample example, I read an XML file using XmlTextReader and call Read method to read its node one by one until end of the file. After reading a node, I check its NodeType property to find the node and write node contents to the console and keep track of number of particular type of nodes. In the end, I display total number of different types of nodes in the document.

Sample Example 2.

using System;

using System.Xml;

namespace ReadingXML2

{

class Class1

{


{

int ws = 0;

int pi = 0;

int dc = 0;

int cc = 0;

int ac = 0;

int et = 0;

int el = 0;

int xd = 0;

// Read a document

XmlTextReader textReader = new XmlTextReader("C:\\books.xml");

// Read until end of file

while (textReader.Read())

{

XmlNodeType nType = textReader.NodeType;

// If node type us a declaration

if (nType == XmlNodeType.XmlDeclaration)

{

Console.WriteLine("Declaration:" + textReader.Name.ToString());

xd = xd + 1;

}

// if node type is a comment

if (nType == XmlNodeType.Comment)

{

Console.WriteLine("Comment:" + textReader.Name.ToString());

cc = cc + 1;

}

// if node type us an attribute

if (nType == XmlNodeType.Attribute)

{

Console.WriteLine("Attribute:" + textReader.Name.ToString());

ac = ac + 1;

}

// if node type is an element

if (nType == XmlNodeType.Element)

{

Console.WriteLine("Element:" + textReader.Name.ToString());

el = el + 1;

}

// if node type is an entity\

if (nType == XmlNodeType.Entity)

{

Console.WriteLine("Entity:" + textReader.Name.ToString());

et = et + 1;

}

// if node type is a Process Instruction

if (nType == XmlNodeType.Entity)

{

Console.WriteLine("Entity:" + textReader.Name.ToString());

pi = pi + 1;

}

// if node type a document

if (nType == XmlNodeType.DocumentType)

{

Console.WriteLine("Document:" + textReader.Name.ToString());

dc = dc + 1;

}

// if node type is white space

if (nType == XmlNodeType.Whitespace)

{

Console.WriteLine("WhiteSpace:" + textReader.Name.ToString());

ws = ws + 1;

}

}

// Write the summary

Console.WriteLine("Total Comments:" + cc.ToString());

Console.WriteLine("Total Attributes:" + ac.ToString());

Console.WriteLine("Total Elements:" + el.ToString());

Console.WriteLine("Total Entity:" + et.ToString());

Console.WriteLine("Total Process Instructions:" + pi.ToString());

Console.WriteLine("Total Declaration:" + xd.ToString());

Console.WriteLine("Total DocumentType:" + dc.ToString());

Console.WriteLine("Total WhiteSpaces:" + ws.ToString());

}

}

}

Writing XML Documents


In this sample example, I create a new file myxmlFile.xml using

XmlTextWriter and use its various write methods to write XML items.

Sample Example 3.

using System;

using System.Xml;


{

class Class1

{


{

// Create a new file in C:\\ dir

XmlTextWriter textWriter = new XmlTextWriter("C:\\myXmFile.xml", null);

// Opens the document

textWriter.WriteStartDocument();

// Write comments

textWriter.WriteComment("First Comment XmlTextWriter Sample Example");

textWriter.WriteComment("myXmlFile.xml in root dir");

// Write first element

textWriter.WriteStartElement("Student");

textWriter.WriteStartElement("r", "RECORD", "urn:record");

// Write next element

textWriter.WriteStartElement("Name", "");

textWriter.WriteString("Student");

textWriter.WriteEndElement();

// Write one more element

textWriter.WriteStartElement("Address", ""); textWriter.WriteString("Colony");


// WriteChars

char[] ch = new char[3];

ch[0] = 'a';

ch[1] = 'r';

ch[2] = 'c';

textWriter.WriteStartElement("Char");

textWriter.WriteChars(ch, 0, ch.Length);


// Ends the document.

textWriter.WriteEndDocument();

// close writer

textWriter.Close();

}

}

}

Writing Data from a database(SQL) to an XML Document

Sample Example 4.

using System;

using System.Xml;

using System.Data;

using System.Data.SqlClient;


{

class Class1

{


{

// create a connection

SqlConnection con = new SqlConnection();

con.ConnectionString = @"server = turgaypc\sqlexpress;integrated security = true;database = northwind";

// create a data adapter

SqlDataAdapter da = new SqlDataAdapter("Select * from Customers", con);

// create a new dataset

DataSet ds = new DataSet();

// fill dataset

da.Fill(ds, "Customers");

// write dataset contents to an xml file by calling WriteXml method

ds.WriteXml("g:\\OutputXML.xml");

}

}

}

//Example 5

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.Data.OleDb;

using System.Xml;

public class DataGridXML : System.Windows.Forms.Form

{

private System.Windows.Forms.DataGrid dataGrid1;

public DataGridXML()

{

this.dataGrid1 = new System.Windows.Forms.DataGrid();

this.dataGrid1.DataMember = "";

this.dataGrid1.Location = new System.Drawing.Point(8, 16);

this.dataGrid1.Name = "dataGrid1";

this.dataGrid1.Size = new System.Drawing.Size(264, 232);

this.dataGrid1.TabIndex = 0;

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(292, 273);

this.Controls.AddRange(new System.Windows.Forms.Control[] { this.dataGrid1 });

((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();

this.ResumeLayout(false);

XmlDataDocument xmlDatadoc = new XmlDataDocument();

xmlDatadoc.DataSet.ReadXml("G:\\books.xml");

DataSet ds = new DataSet("Books DataSet");

ds = xmlDatadoc.DataSet;

dataGrid1.DataSource = ds.DefaultViewManager;

}

static void Main()

{

Application.Run(new DataGridXML());

}

}

//Example 6

using System;

using System.Drawing;

using System.Collections;

using System.ComponentModel;

using System.Windows.Forms;

using System.Data;

using System.IO;

using System.Xml;

public class XmlDataGridForm : System.Windows.Forms.Form

{

private System.Windows.Forms.DataGrid dgLateXmlBound;

private System.Windows.Forms.Button cmdLoad;

private System.Windows.Forms.Button cmdSave;

private XmlDataDocument xdocSnowReports;

private System.Windows.Forms.DataGridTableStyle dgsResorts;

private System.Windows.Forms.DataGridTextBoxColumn tbcResort;

private System.Windows.Forms.DataGridTextBoxColumn tbcSnowMin;

private System.Windows.Forms.DataGridTextBoxColumn tbcSnowHigh;

public XmlDataGridForm()

{

this.dgLateXmlBound = new System.Windows.Forms.DataGrid();

this.cmdLoad = new System.Windows.Forms.Button();

this.cmdSave = new System.Windows.Forms.Button();

this.dgsResorts = new System.Windows.Forms.DataGridTableStyle();

this.tbcResort = new System.Windows.Forms.DataGridTextBoxColumn();

this.tbcSnowMin = new System.Windows.Forms.DataGridTextBoxColumn();

this.tbcSnowHigh = new System.Windows.Forms.DataGridTextBoxColumn();

((System.ComponentModel.ISupportInitialize)(this.dgLateXmlBound)).BeginInit();

this.SuspendLayout();

//

// dgLateXmlBound

//

this.dgLateXmlBound.DataMember = "";

this.dgLateXmlBound.HeaderForeColor = System.Drawing.SystemColors.ControlText;

this.dgLateXmlBound.Name = "dgLateXmlBound";

this.dgLateXmlBound.Size = new System.Drawing.Size(432, 264);

this.dgLateXmlBound.TabIndex = 0;

this.dgLateXmlBound.TableStyles.AddRange(new System.Windows.Forms.DataGridTableStyle[] {

this.dgsResorts});

//

// cmdLoad

//

this.cmdLoad.Location = new System.Drawing.Point(8, 280);

this.cmdLoad.Name = "cmdLoad";

this.cmdLoad.TabIndex = 1;

this.cmdLoad.Text = "load";

this.cmdLoad.Click += new System.EventHandler(this.cmdLoad_Click);

//

// cmdSave

//

this.cmdSave.Location = new System.Drawing.Point(96, 280);

this.cmdSave.Name = "cmdSave";

this.cmdSave.TabIndex = 2;

this.cmdSave.Text = "save";

this.cmdSave.Click += new System.EventHandler(this.cmdSave_Click);

//

// dgsResorts

//

this.dgsResorts.DataGrid = this.dgLateXmlBound;

this.dgsResorts.GridColumnStyles.AddRange(new System.Windows.Forms.DataGridColumnStyle[] {

this.tbcResort,

this.tbcSnowMin,

this.tbcSnowHigh});

this.dgsResorts.HeaderForeColor = System.Drawing.SystemColors.ControlText;

this.dgsResorts.MappingName = "Resort";

//

// tbcResort

//

this.tbcResort.Format = "";

this.tbcResort.FormatInfo = null;

this.tbcResort.HeaderText = "Resort name";

this.tbcResort.MappingName = "Name";

this.tbcResort.Width = 75;

//

// tbcSnowMin

//

this.tbcSnowMin.Format = "";

this.tbcSnowMin.FormatInfo = null;

this.tbcSnowMin.HeaderText = "Min snow";

this.tbcSnowMin.MappingName = "SnowLow";

this.tbcSnowMin.Width = 75;

//

// tbcSnowHigh

//

this.tbcSnowHigh.Format = "";

this.tbcSnowHigh.FormatInfo = null;

this.tbcSnowHigh.HeaderText = "Max snow";

this.tbcSnowHigh.MappingName = "SnowHigh";

this.tbcSnowHigh.Width = 75;

//

// XmlDataGridForm

//

this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);

this.ClientSize = new System.Drawing.Size(432, 309);

this.Controls.AddRange(new System.Windows.Forms.Control[] {

this.cmdSave,

this.cmdLoad,

this.dgLateXmlBound});

this.Name = "XmlDataGridForm";

this.Text = "XML in DataGrid";

((System.ComponentModel.ISupportInitialize)(this.dgLateXmlBound)).EndInit();

this.ResumeLayout(false);

xdocSnowReports = new XmlDataDocument();

}

static void Main()

{

Application.Run(new XmlDataGridForm());

}

private void cmdLoad_Click(object sender, System.EventArgs e)

{

xdocSnowReports.DataSet.ReadXml(new StreamReader("G:\\Books.xml"), XmlReadMode.InferSchema);

dgLateXmlBound.SetDataBinding(xdocSnowReports.DataSet, "Book");

DataRow dr = xdocSnowReports.DataSet.Tables["Book"].Rows[0];

string strCaption = dr["Title"].ToString();

this.dgLateXmlBound.CaptionText = "Snow report on " + strCaption;

}

private void cmdSave_Click(object sender, System.EventArgs e)

{

xdocSnowReports.DataSet.WriteXml("g:\\hardcodedfilename.xml");

}

}

Example 7

//Select nodes in RSS

using System;

using System.Collections.Generic;

using System.Text;

using System.Xml;

using System.Net;

class MainClass

{


{

WebClient client = new WebClient();

string rssFeed = client.DownloadString("http://blogs.apress.com/wp-rss2.php");

XmlDocument doc = new XmlDocument();

doc.LoadXml(rssFeed);

XmlNodeList nodes = doc.SelectNodes("rss/channel/item/title");

foreach (XmlNode node in nodes)

{

Console.WriteLine(node.InnerText);

}

}

}