XmlAttributeEventArgs Class

Definition

Fornece dados para o evento de UnknownAttribute .Provides data for the UnknownAttribute event.

public ref class XmlAttributeEventArgs : EventArgs
public class XmlAttributeEventArgs : EventArgs
type XmlAttributeEventArgs = class
    inherit EventArgs
Public Class XmlAttributeEventArgs
Inherits EventArgs
Inheritance
XmlAttributeEventArgs

Examples

O exemplo a seguir desserializa uma classe denominada Group de um arquivo chamado não conhecidoattributes. xml.The following example deserializes a class named Group from a file named UnknownAttributes.xml. Sempre que um elemento é encontrado no arquivo que não tem nenhum membro correspondente na classe, o evento UnknownAttribute ocorre.Whenever an element is found in the file that has no corresponding member in the class, the UnknownAttribute event occurs. Para testar o exemplo, Cole o código XML a seguir em um arquivo chamado UnknownAttributes. xml.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.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
{
public:
   static void main()
   {
      Test^ t = gcnew 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{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 ));
      fs->Close();
   }
};

int main()
{
   Test::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.
      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();
    }
}
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("UnknownAttributes.xml")
   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)
     fs.Close()
   End Sub
End Class

Remarks

Para obter mais informações sobre como manipular eventos, consulte visão geral de eventos.For more information about handling events, see Events Overview.

O evento UnknownAttribute ocorre somente quando você chama o método Deserialize.The UnknownAttribute event occurs only when you call the Deserialize method.

Properties

Attr

Obtém um objeto que representa o atributo XML desconhecido.Gets an object that represents the unknown XML attribute.

ExpectedAttributes

Obtém uma lista delimitada por vírgulas de nomes do atributo XML que deve estar em uma instância de documento XML.Gets a comma-delimited list of XML attribute names expected to be in an XML document instance.

LineNumber

Obtém o número de linha do atributo XML desconhecido.Gets the line number of the unknown XML attribute.

LinePosition

Obtém a posição na linha do atributo XML desconhecido.Gets the position in the line of the unknown XML attribute.

ObjectBeingDeserialized

Obtém o objeto que está sendo desserializado.Gets the object being deserialized.

Methods

Equals(Object)

Determina se o objeto especificado é igual ao objeto atual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
GetHashCode()

Serve como a função de hash padrão.Serves as the default hash function.

(Inherited from Object)
GetType()

Obtém o Type da instância atual.Gets the Type of the current instance.

(Inherited from Object)
MemberwiseClone()

Cria uma cópia superficial do Object atual.Creates a shallow copy of the current Object.

(Inherited from Object)
ToString()

Retorna uma cadeia de caracteres que representa o objeto atual.Returns a string that represents the current object.

(Inherited from Object)

Applies to

See also