【图】.Net FrameWork SDK文档的例子演示

XmlDocument.CreateAttribute 效果演示

using System;
using System.IO;
using System.Xml;

namespace CreateAttribute
{
/// <summary
/// Class1 的摘要说明。
/// </summary
class Class1
{
  /// <summary
  /// 应用程序的主入口点。
  /// </summary
  [STAThread]
  static void Main(string[] args)
  {
   //
   // TODO: 在此处添加代码以启动应用程序
   //
   XmlDocument doc = new XmlDocument();
   doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'" +
    "<titlePride And Prejudice</title" +
    "</book");

   //Create an attribute.
   XmlAttribute attr = doc.CreateAttribute("publisher");
   attr.Value = "WorldWide Publishing";

   //Add the new node to the document.
   doc.DocumentElement.SetAttributeNode(attr);

   Console.WriteLine("Display the modified XML...");
   doc.Save(Console.Out);
  }
}
}

效果如下：
Display the modified XML...
<?xml version="1.0" encoding="gb2312"?
<book genre="novel" ISBN="1-861001-57-5" publisher="WorldWide Publishing"
<titlePride And Prejudice</title
</bookPress any key to continue

XmlDocument.CreateNode 方法效果演示

using System;
using System.Xml;

namespace CreateNode
{
/// <summary
/// Class1 的摘要说明。
/// </summary
class Class1
{
  /// <summary
  /// 应用程序的主入口点。
  /// </summary
  [STAThread]
  static void Main(string[] args)
  {
   //
   // TODO: 在此处添加代码以启动应用程序
   //
   XmlDocument doc = new XmlDocument();
   doc.LoadXml("<book" +
    " <titleOberon's Legacy</title" +
    " <price5.95</price" +
    "</book");

   // Create a new element node.
   XmlNode newElem;
   newElem = doc.CreateNode(XmlNodeType.Element, "pages", "");
   newElem.InnerText = "290";

   Console.WriteLine("Add the new element to the document...");
   XmlElement root = doc.DocumentElement;
   root.AppendChild(newElem);

   Console.WriteLine("Display the modified XML document...");
   Console.WriteLine(doc.OuterXml);
  }
}
}

效果：
Add the new element to the document...
Display the modified XML document...
<book<titleOberon's Legacy</title<price5.95</price<pages290</pages</book