.NET & XML

The .NET DOM Implementation

.NET implements only Levels 1 and 2 of the Core module of DOM. As such, the core DOM functionality is provided: standard node types and the object tree view of a document. .NET also provides some features specified in other modules that are not yet part of an official DOM level (such as loading and saving of a document, and document traversal via XPath). If these modules become official W3C Recommendations, it is expected that future .NET implementations will support them.

Example 5-1 lists a program you can run to demonstrate which features the .NET Framework’s DOM implementation supports.

Example 5-1. A program to report DOM module support

using System;

using System.Xml;

class DomFeatureChecker {

  private static readonly string [ ] versions = new string [ ] {
    "1.0", "2.0" };
  
  private static readonly string [ ] features = new string [ ] { 
    "Core", "XML", "HTML", "Views", "Stylesheets", "CSS", 
    "CSS2", "Events", "UIEvents", "MouseEvents", "MutationEvents", 
    "HTMLEvents", "Range", "Traversal" };

  public static void Main(string[ ] args) {
    XmlImplementation impl = new XmlImplementation( );
        
    foreach (string version in versions) {
      foreach (string feature in features) {
        Console.WriteLine("{0} {1}={2}", feature, version, 
          impl.HasFeature(feature, version));
      }
    }
  }
}

The HasFeature( ) method of the XmlImplementation class returns true if the given feature is implemented. If you run this program with the .NET Framework version 1.0 or 1.1, you’ll see the following output: ...