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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
)
/** @delegate */
public delegate void XmlNodeEventHandler (
	Object sender, 
	XmlNodeEventArgs e
)
JScript supports the use of delegates, but not the declaration of new ones.

Parameters

sender

The source of the event.

e

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
        (Serializer_UnknownNode);
    // 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;
    Console.WriteLine(myNodeType);
}


private void DeserializeItem(String fileName)
{
    XmlSerializer mySerializer =
        new XmlSerializer(ObjectToDeserialize.class.ToType());

    // Add an instance of the delegate to the event.
    mySerializer.add_UnknownNode(
        new XmlNodeEventHandler(Serializer_UnknownNode));

    // A FileStream is needed to read the file to deserialize.
    FileStream fs = new FileStream(fileName, FileMode.Open);
    ObjectToDeserialize o =
        (ObjectToDeserialize)mySerializer.Deserialize(fs);
} //DeserializeItem

protected void Serializer_UnknownNode(Object sender, XmlNodeEventArgs e)
{
    Console.WriteLine("UnknownNode Name: " + e.get_Name());
    Console.WriteLine("UnknownNode LocalName: " + e.get_LocalName());
    Console.WriteLine("UnknownNode Namespace URI: " + e.get_NamespaceURI());
    Console.WriteLine("UnknownNode Text: " + e.get_Text());

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

    XmlNodeType myNodeType = e.get_NodeType();
    Console.WriteLine(myNodeType);
} //Serializer_UnknownNode

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0
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