XmlElementEventArgs.Element Property
Definition
Important
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Gets the object that represents the unknown XML element.
public:
property System::Xml::XmlElement ^ Element { System::Xml::XmlElement ^ get(); };
public System.Xml.XmlElement Element { get; }
member this.Element : System.Xml.XmlElement
Public ReadOnly Property Element As XmlElement
Property Value
The object that represents the unknown XML element.
Examples
The following example deserializes a class named Group
from a file named UnknownElements.xml. Whenever an element is found in the file that has no corresponding member in the class, the UnknownElement event occurs. To try the example, paste the following XML code into a file named UnknownElements.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">
<GroupName>MyGroup</GroupName>
<GroupSize>Large</GroupSize>
<GroupNumber>444</GroupNumber>
<GroupBase>West</GroupBase>
</Group>
#using <System.Xml.dll>
#using <System.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml::Serialization;
using namespace System::Xml;
using namespace System::Xml::Schema;
public ref class Group
{
public:
String^ GroupName;
};
public ref class Test
{
private:
void Serializer_UnknownElement( Object^ sender, XmlElementEventArgs^ e )
{
Console::WriteLine( "Unknown Element" );
Console::Write( "\t {0}", e->Element->Name );
Console::WriteLine( " {0}", e->Element->InnerXml );
Console::WriteLine( "\t LineNumber: {0}", e->LineNumber );
Console::WriteLine( "\t LinePosition: {0}", e->LinePosition );
Group^ x = dynamic_cast<Group^>(e->ObjectBeingDeserialized);
Console::WriteLine( x->GroupName );
Console::WriteLine( sender );
}
public:
void DeserializeObject( String^ filename )
{
XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid );
// Add a delegate to handle unknown element events.
ser->UnknownElement += gcnew XmlElementEventHandler( this, &Test::Serializer_UnknownElement );
// A FileStream is needed to read the XML document.
FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
Group^ g = dynamic_cast<Group^>(ser->Deserialize( fs ));
fs->Close();
}
};
int main()
{
Test^ t = gcnew Test;
// Deserialize the file containing unknown elements.
t->DeserializeObject( "UnknownElements.xml" );
}
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("UnknownElements.xml");
}
private void Serializer_UnknownElement(object sender, XmlElementEventArgs e){
Console.WriteLine("Unknown Element");
Console.WriteLine("\t" + e.Element.Name + " " + e.Element.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.UnknownElement+=new XmlElementEventHandler(Serializer_UnknownElement);
// A FileStream is needed to read the XML document.
FileStream fs = new FileStream(filename, FileMode.Open);
Group g = (Group) ser.Deserialize(fs);
fs.Close();
}
}
Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml
Imports System.Xml.Schema
Public Class Group
Public GroupName As String
End Class
Public Class Test
Shared Sub Main()
Dim t As Test = new Test()
' Deserialize the file containing unknown elements.
t.DeserializeObject("UnknownElements.xml")
End Sub
Private Sub Serializer_UnknownElement _
(sender As Object , e As XmlElementEventArgs)
Console.WriteLine("Unknown Element")
Console.WriteLine(ControlChars.Tab & e.Element.Name + " " & e.Element.InnerXml)
Console.WriteLine(ControlChars.Tab & e.LineNumber & ":" & e.LineNumber)
Console.WriteLine(ControlChars.Tab & e.LinePosition & ":" & e.LinePosition)
Dim x As Group = CType( e.ObjectBeingDeserialized, Group)
Console.WriteLine (x.GroupName)
Console.WriteLine (sender.ToString())
End Sub
Private Sub DeserializeObject(filename As String)
Dim ser As XmlSerializer = new XmlSerializer(GetType(Group))
' Add a delegate to handle unknown element events.
AddHandler ser.UnknownElement, _
AddressOf Serializer_UnknownElement
' A FileStream is needed to read the XML document.
Dim fs As FileStream = new FileStream(filename, FileMode.Open)
Dim g As Group = CType(ser.Deserialize(fs),Group)
fs.Close()
End Sub
End Class
Applies to
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