XmlAttributeEventArgs Class
Assembly: System.Xml (in system.xml.dll)
For more information about handling events, see Events Overview (Windows Forms).
The UnknownAttribute event occurs only when you call the Deserialize method.
The following example deserializes a class named Group from a file named UnknownAttributes.xml. Whenever an element is found in the file that has no corresponding member in the class, the UnknownAttribute event occurs. To try the example, paste the following XML code into a file named UnknownAttributes.xml.
<?xml version="1.0" encoding="utf-8"?> <Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" GroupType = 'Technical' GroupNumber = '42' GroupBase = 'Red'> <GroupName>MyGroup</GroupName> </Group>
using System; using System.IO; using System.Xml.Serialization; using System.Xml; using System.Xml.Schema; public class Group{ public string GroupName; } public class Test{ static void Main(){ Test t = new Test(); // Deserialize the file containing unknown elements. t.DeserializeObject("UnknownAttributes.xml"); } private void Serializer_UnknownAttribute(object sender, XmlAttributeEventArgs e){ Console.WriteLine("Unknown Attribute"); Console.WriteLine("\t" + e.Attr.Name + " " + e.Attr.InnerXml); Console.WriteLine("\t LineNumber: " + e.LineNumber); Console.WriteLine("\t LinePosition: " + e.LinePosition); Group x = (Group) e.ObjectBeingDeserialized; Console.WriteLine (x.GroupName); Console.WriteLine (sender.ToString()); } private void DeserializeObject(string filename){ XmlSerializer ser = new XmlSerializer(typeof(Group)); // Add a delegate to handle unknown element events. ser.UnknownAttribute+=new XmlAttributeEventHandler(Serializer_UnknownAttribute); // A FileStream is needed to read the XML document. FileStream fs = new FileStream(filename, FileMode.Open); Group g = (Group) ser.Deserialize(fs); fs.Close(); } }
import System.*;
import System.IO.*;
import System.Xml.Serialization.*;
import System.Xml.*;
import System.Xml.Schema.*;
public class Group
{
public String groupName;
} //Group
public class Test
{
public static void main(String[] args)
{
Test t = new Test();
// Deserialize the file containing unknown elements.
t.DeserializeObject("UnknownAttributes.xml");
} //main
private void Serializer_UnknownAttribute(Object sender,
XmlAttributeEventArgs e)
{
Console.WriteLine("Unknown Attribute");
Console.WriteLine("\t" + e.get_Attr().get_Name() + " "
+ e.get_Attr().get_InnerXml());
Console.WriteLine("\t LineNumber: " + e.get_LineNumber());
Console.WriteLine("\t LinePosition: " + e.get_LinePosition());
Group x = (Group)e.get_ObjectBeingDeserialized();
Console.WriteLine(x.groupName);
Console.WriteLine(sender.ToString());
} //Serializer_UnknownAttribute
private void DeserializeObject(String filename)
{
XmlSerializer ser = new XmlSerializer(Group.class.ToType());
// Add a delegate to handle unknown element events.
ser.add_UnknownAttribute(new XmlAttributeEventHandler
(Serializer_UnknownAttribute));
// A FileStream is needed to read the XML document.
FileStream fs = new FileStream(filename, FileMode.Open);
Group g = (Group)ser.Deserialize(fs);
fs.Close();
} //DeserializeObject
} //Test
Windows 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.