XmlSerializer.UnknownAttribute XmlSerializer.UnknownAttribute XmlSerializer.UnknownAttribute XmlSerializer.UnknownAttribute Event


逆シリアル化時に XmlSerializer が不明な型の XML 属性を認識した場合に発生します。Occurs when the XmlSerializer encounters an XML attribute of unknown type during deserialization.

 event System::Xml::Serialization::XmlAttributeEventHandler ^ UnknownAttribute;
public event System.Xml.Serialization.XmlAttributeEventHandler UnknownAttribute;
member this.UnknownAttribute : System.Xml.Serialization.XmlAttributeEventHandler 
Public Custom Event UnknownAttribute As XmlAttributeEventHandler 

次の例では、XML ドキュメントを逆シリアル化中に検出された不明な属性に関する情報を出力します。The following example prints information about any unknown attributes encountered while deserializing an XML document.

#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
   String^ GroupName;

public ref class Test
   static void main()
      Test^ t = gcnew Test;
      // Deserialize the file containing unknown elements.
      t->DeserializeObject( "UnknownAttributes.xml" );

   void Serializer_UnknownAttribute( Object^ sender, XmlAttributeEventArgs^ e )
      Console::WriteLine( "Unknown Attribute" );
      Console::WriteLine( "\t{0} {1}", e->Attr->Name, e->Attr->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 );

   void DeserializeObject( String^ filename )
      XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid );

      // Add a delegate to handle unknown element events.
      ser->UnknownAttribute += gcnew XmlAttributeEventHandler( this, &Test::Serializer_UnknownAttribute );

      // A FileStream is needed to read the XML document.
      FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
      Group^ g = dynamic_cast<Group^>(ser->Deserialize( fs ));

int main()
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.
   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);
Imports System
Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml
Imports System.Xml.Schema
Imports Microsoft.VisualBasic

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.
   End Sub

   Private Sub Serializer_UnknownAttribute _
   (sender As Object , e As XmlAttributeEventArgs)
      Console.WriteLine("Unknown Attribute")
      Console.WriteLine(ControlChars.Tab & e.Attr.Name + " " & e.Attr.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.UnknownAttribute, _
      AddressOf Serializer_UnknownAttribute 
      ' 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)
   End Sub
End Class


既定では、呼び出した後、Deserializeメソッド、XmlSerializer不明な種類の XML 属性を無視します。By default, after calling the Deserialize method, the XmlSerializer ignores XML attributes of unknown types. ただし、このイベントを使用すると、このようなノード型を処理します。However, you can use this event to handle such node types.

逆シリアル化されるクラスのインスタンスの配列を返すフィールドに含まれる場合XmlAttributeオブジェクトとXmlAnyAttributeAttribute、フィールドに適用されて、UnknownAttributeイベントは発生しません。If the instance of the class being deserialized contains a field that returns an array of XmlAttribute objects and an XmlAnyAttributeAttribute has been applied to the field, the UnknownAttribute event does not occur. 代わりに、すべての不明な XML 属性は、配列に収集されます。Instead, all unknown XML attributes are collected into the array.