Csharp/C Sharp by API/System.Xml/XmlDocument

new XmlDocument()

  
using System;
using System.Collections;
using System.Data;
using System.Xml;
public class MainClass {
   public static void Main() {
      XmlDocument doc = new XmlDocument();
      XmlElement root = doc.CreateElement( "books" );
      doc.AppendChild( root );
      XmlElement eltBook = doc.CreateElement( "book" );
      root.AppendChild( eltBook );
      XmlElement eltTitle = doc.CreateElement( "title" );
      eltTitle.AppendChild( doc.CreateTextNode( "myTitle" ) );
      eltBook.AppendChild( eltTitle );
      XmlElement eltAuthor = doc.CreateElement( "author" );
      eltAuthor.AppendChild( doc.CreateTextNode(  "myAuthor" ) );
      eltBook.AppendChild( eltAuthor );
      XmlElement eltPrice = doc.CreateElement( "price" );
      eltPrice.AppendChild( doc.CreateTextNode(  "10.0" ) );
      eltBook.AppendChild( eltPrice );
      Console.WriteLine( doc.OuterXml );
   }
}

XmlDocument.AppendChild(XmlNode docNode)

  
    
    
using System;
using System.Xml;
public class MainClass
{
  [STAThread]
  private static void Main(string[] args)
  {
    // Create the basic document.
    XmlDocument doc = new XmlDocument();
    XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
    doc.AppendChild(docNode);
    XmlNode productsNode = doc.CreateElement("products");
    doc.AppendChild(productsNode);
    // Add two products.
    XmlNode productNode = AddElement("product", null, productsNode);
    AddAttribute("id", "1001", productNode);
    AddElement("productName", "Coffee", productNode);
    AddElement("productPrice", "0.99", productNode);
    
    doc.Save(Console.Out);
  }
  public static XmlNode AddElement(string tagName, string textContent, XmlNode parent)
  {
    XmlNode node = parent.OwnerDocument.CreateElement(tagName);
    parent.AppendChild(node);
    if (textContent != null)
    {
      XmlNode content = parent.OwnerDocument.CreateTextNode(textContent);
      node.AppendChild(content);
    }
    return node;
  }
  public static XmlNode AddAttribute(string attributeName, string textContent, XmlNode parent)
  {
    XmlAttribute attribute = parent.OwnerDocument.CreateAttribute(attributeName);
    attribute.Value = textContent;
    parent.Attributes.Append(attribute);
    return attribute;
  }
}

XmlDocument.CreateComment(String comments)

  
using System;
using System.Xml;
class MainClass
{
  static void Main(string[] args)
  {
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml("<Record> Some Value </Record>");
        XmlNode node1 = xmlDoc.CreateComment("DOM Testing Sample");
    xmlDoc.AppendChild( node1);
    node1 = xmlDoc.CreateElement("FirstName");
    node1.InnerText = "M";
    xmlDoc.DocumentElement.AppendChild(node1);
    xmlDoc.Save(Console.Out);
  }    
}

XmlDocument.CreateElement

  

using System;
using System.Xml;
public class MainClass
{
  [STAThread]
  private static void Main(string[] args)
  {
    XmlDocument doc = new XmlDocument();
    XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
    doc.AppendChild(docNode);
    XmlNode productsNode = doc.CreateElement("products");
    doc.AppendChild(productsNode);
    XmlNode productNode = doc.CreateElement("product");
    XmlAttribute productAttribute = doc.CreateAttribute("id");
    productAttribute.Value = "1001";
    productNode.Attributes.Append(productAttribute);
        productsNode.AppendChild(productNode);
    productNode = doc.CreateElement("product");
    productAttribute = doc.CreateAttribute("id");
    productAttribute.Value = "1002";
    productNode.Attributes.Append(productAttribute);
    productsNode.AppendChild(productNode);
    XmlNode nameNode = doc.CreateElement("productName");
    nameNode.AppendChild(doc.CreateTextNode("Pot"));
    productNode.AppendChild(nameNode);
    XmlNode priceNode = doc.CreateElement("productPrice");
    priceNode.AppendChild(doc.CreateTextNode("102.99"));
    productNode.AppendChild(priceNode);

      // Save the document (to the Console window rather than a file).
    doc.Save(Console.Out);
  }
}

XmlDocument.CreateXmlDeclaration

  
using System;
using System.Xml;
public class MainClass
{
  [STAThread]
  private static void Main(string[] args)
  {
    XmlDocument doc = new XmlDocument();
    XmlNode docNode = doc.CreateXmlDeclaration("1.0", "UTF-8", null);
    doc.AppendChild(docNode);
    XmlNode productsNode = doc.CreateElement("products");
    doc.AppendChild(productsNode);
    XmlNode productNode = doc.CreateElement("product");
    XmlAttribute productAttribute = doc.CreateAttribute("id");
    productAttribute.Value = "1001";
    productNode.Attributes.Append(productAttribute);
        productsNode.AppendChild(productNode);
    XmlNode nameNode = doc.CreateElement("productName");
    nameNode.AppendChild(doc.CreateTextNode("Gourmet Coffee"));
    productNode.AppendChild(nameNode);
    XmlNode priceNode = doc.CreateElement("productPrice");
    priceNode.AppendChild(doc.CreateTextNode("0.99"));
    productNode.AppendChild(priceNode);

      // Save the document (to the Console window rather than a file).
    doc.Save(Console.Out);
  }
}

XmlDocument.LoadXml(String xmlString)

  
using System;
using System.Xml;
class MainClass
{
  static void Main(string[] args)
  {
    XmlDocument xmlDoc = new XmlDocument();    
    xmlDoc.LoadXml("<Record> write something</Record>");
        xmlDoc.Save(Console.Out);
  }    
 
}

XmlDocument.Save()

  
using System;
using System.Xml;
class MainClass
{
  static void Main(string[] args)
  {
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.LoadXml("<Record> Some Value </Record>");
        XmlNode node1 = xmlDoc.CreateComment("DOM Testing Sample");
    xmlDoc.AppendChild( node1);
    node1 = xmlDoc.CreateElement("FirstName");
    node1.InnerText = "M";
    xmlDoc.DocumentElement.AppendChild(node1);
    xmlDoc.Save(Console.Out);
  }    
}

XmlDocument.SelectNodes

 
using System;
using System.Xml;
public class XPathSelectNodes {
    private static void Main() {
        // Load the document.
        XmlDocument doc = new XmlDocument();
        doc.Load("books.xml");
        XmlNodeList nodes = doc.SelectNodes("/books/A/B");
            
        foreach (XmlNode node in nodes) {
            Console.WriteLine(node.InnerText);
        }
    }
}

XmlDocument.SelectSingleNode

 
using System;
using System.Xml;
using System.Xml.XPath;
public class XPathQuery {
  public static void Main(string [] args) {
    string filename = "inventory.xml";
    string xpathExpression = "//inventory/items";
    XmlDocument document = new XmlDocument( );
    document.Load(filename);
    XmlTextWriter writer = new XmlTextWriter(Console.Out);
    writer.Formatting = Formatting.Indented;
    XmlNode node = document.SelectSingleNode(xpathExpression);
    node.WriteTo(writer);
    writer.Close( );
  }
}