This documentation is archived and is not being maintained.

XmlNodeEventHandler Delegate

Represents the method that handles the UnknownNode event of an XmlSerializer.

Namespace:  System.Xml.Serialization
Assembly:  System.Xml (in System.Xml.dll)

public delegate void XmlNodeEventHandler(
	Object sender,
	XmlNodeEventArgs e


Type: System.Object
The source of the event.
Type: System.Xml.Serialization.XmlNodeEventArgs
An XmlNodeEventArgs that contains the event data.

When you create an XmlNodeEventHandler delegate, you identify the method that handles the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates.

The UnknownNode event occurs only when you call the Deserialize method.

The following example creates an XmlSerializer, adds an event handler for the UnknownNode event, and deserializes an object.

    private void DeserializeItem(string filename) {
        XmlSerializer mySerializer = 
            new XmlSerializer(typeof(ObjectToDeserialize));
        // Add an instance of the delegate to the event.
        mySerializer.UnknownNode += new XmlNodeEventHandler
        // A FileStream is needed to read the file to deserialize.
        FileStream fs = new FileStream(filename, FileMode.Open);
        ObjectToDeserialize o = (ObjectToDeserialize)mySerializer.Deserialize(fs);

    private void Serializer_UnknownNode
        (object sender, XmlNodeEventArgs e) {

        Console.WriteLine("UnknownNode Name: "
                          + e.Name);
        Console.WriteLine("UnknownNode LocalName: "
                          + e.LocalName);
        Console.WriteLine("UnknownNode Namespace URI: "
                          + e.NamespaceURI);
        Console.WriteLine("UnknownNode Text: "
                          + e.Text);

        object o = e.ObjectBeingDeserialized;
        Console.WriteLine("Object being deserialized " 
                          + o.ToString());

        XmlNodeType myNodeType = e.NodeType;

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.