XmlAttributes.XmlArray Propiedad

Referencia

Definición

Espacio de nombres:: System.Xml.Serialization

Ensamblado:: System.Xml.XmlSerializer.dll

Ensamblado:: System.Xml.dll

Ensamblado:: netstandard.dll

Importante

Parte de la información hace referencia a la versión preliminar del producto, que puede haberse modificado sustancialmente antes de lanzar la versión definitiva. Microsoft no otorga ninguna garantía, explícita o implícita, con respecto a la información proporcionada aquí.

Obtiene o establece un objeto que especifica el modo en que XmlSerializer serializa un campo público o una propiedad pública de lectura/escritura que devuelve una matriz.

public:
 property System::Xml::Serialization::XmlArrayAttribute ^ XmlArray { System::Xml::Serialization::XmlArrayAttribute ^ get(); void set(System::Xml::Serialization::XmlArrayAttribute ^ value); };

public System.Xml.Serialization.XmlArrayAttribute XmlArray { get; set; }

public System.Xml.Serialization.XmlArrayAttribute? XmlArray { get; set; }

member this.XmlArray : System.Xml.Serialization.XmlArrayAttribute with get, set

Public Property XmlArray As XmlArrayAttribute

Valor de propiedad

XmlArrayAttribute

XmlArrayAttribute que especifica el modo en que XmlSerializer serializa un campo público o una propiedad pública de lectura/escritura que devuelve una matriz.

Ejemplos

En el ejemplo siguiente se serializa una clase que contiene un campo denominado Members que devuelve una matriz de objetos . XmlArrayAttribute se usa para invalidar la serialización del campo y cambiar el nombre del elemento a Staff.

#using <System.Xml.dll>
#using <System.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public ref class Member
{
public:
   String^ MemberName;
};


// This is the class that will be serialized.
public ref class Group
{
public:

   // This field will be overridden.
   array<Member^>^Members;
};


// Return an XmlSerializer used for overriding. 
XmlSerializer^ CreateOverrider()
{
   // Creating XmlAttributeOverrides and XmlAttributes objects.
   XmlAttributeOverrides^ xOver = gcnew XmlAttributeOverrides;
   XmlAttributes^ xAttrs = gcnew XmlAttributes;

   // Add an override for the XmlArray.    
   XmlArrayAttribute^ xArray = gcnew XmlArrayAttribute( "Staff" );
   xArray->Namespace = "http://www.cpandl.com";
   xAttrs->XmlArray = xArray;
   xOver->Add( Group::typeid, "Members", xAttrs );

   // Create the XmlSerializer and return it.
   return gcnew XmlSerializer( Group::typeid,xOver );
}

void SerializeObject( String^ filename )
{
   // Create an instance of the XmlSerializer class.
   XmlSerializer^ mySerializer = CreateOverrider();

   // Writing the file requires a TextWriter.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Create an instance of the class that will be serialized.
   Group^ myGroup = gcnew Group;

   // Set the object properties.
   Member^ m = gcnew Member;
   m->MemberName = "Paul";
   array<Member^>^temp = {m};
   myGroup->Members = temp;

   // Serialize the class, and close the TextWriter.
   mySerializer->Serialize( writer, myGroup );
   writer->Close();
}

void DeserializeObject( String^ filename )
{
   XmlSerializer^ mySerializer = CreateOverrider();
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Group^ myGroup = dynamic_cast<Group^>(mySerializer->Deserialize( fs ));
   System::Collections::IEnumerator^ myEnum = myGroup->Members->GetEnumerator();
   while ( myEnum->MoveNext() )
   {
      Member^ m = safe_cast<Member^>(myEnum->Current);
      Console::WriteLine( m->MemberName );
   }
}

int main()
{
   SerializeObject( "OverrideArray.xml" );
   DeserializeObject( "OverrideArray.xml" );
}

using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;

// This is the class that will be serialized.
public class Group
{
   // This field will be overridden.
   public Member [] Members;
}

public class Member
{
   public string MemberName;
}

public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.SerializeObject("OverrideArray.xml");
      test.DeserializeObject("OverrideArray.xml");
   }
   // Return an XmlSerializer used for overriding.
   public XmlSerializer CreateOverrider()
   {
      // Creating XmlAttributeOverrides and XmlAttributes objects.
      XmlAttributeOverrides xOver = new XmlAttributeOverrides();
      XmlAttributes xAttrs = new XmlAttributes();

      // Add an override for the XmlArray.
      XmlArrayAttribute xArray = new XmlArrayAttribute("Staff");
      xArray.Namespace = "http://www.cpandl.com";
      xAttrs.XmlArray = xArray;
      xOver.Add(typeof(Group), "Members", xAttrs);

      // Create the XmlSerializer and return it.
      return new XmlSerializer(typeof(Group), xOver);
   }

   public void SerializeObject(string filename)
   {
      // Create an instance of the XmlSerializer class.
      XmlSerializer mySerializer =  CreateOverrider();
      // Writing the file requires a TextWriter.
      TextWriter writer = new StreamWriter(filename);

      // Create an instance of the class that will be serialized.
      Group myGroup = new Group();

      // Set the object properties.
      Member m = new Member();
      m.MemberName = "Paul";
      myGroup.Members = new Member[1] {m};

      // Serialize the class, and close the TextWriter.
      mySerializer.Serialize(writer, myGroup);
      writer.Close();
   }

   public void DeserializeObject(string filename)
   {
      XmlSerializer mySerializer = CreateOverrider();
      FileStream fs = new FileStream(filename, FileMode.Open);
      Group myGroup = (Group)
      mySerializer.Deserialize(fs);
      foreach(Member m in myGroup.Members)
      {
         Console.WriteLine(m.MemberName);
      }
   }
}

Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization


' This is the class that will be serialized.
Public Class Group
    ' This field will be overridden.
    Public Members() As Member
End Class

Public Class Member
    Public MemberName As String
End Class

Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("OverrideArray.xml")
        test.DeserializeObject("OverrideArray.xml")
    End Sub
    
    ' Return an XmlSerializer used for overriding. 
    Public Function CreateOverrider() As XmlSerializer
        ' Creating XmlAttributeOverrides and XmlAttributes objects.
        Dim xOver As New XmlAttributeOverrides()
        Dim xAttrs As New XmlAttributes()
        
        ' Add an override for the XmlArray.    
        Dim xArray As New XmlArrayAttribute("Staff")
        xArray.Namespace = "http://www.cpandl.com"
        xAttrs.XmlArray = xArray
        xOver.Add(GetType(Group), "Members", xAttrs)
        
        ' Create the XmlSerializer and return it.
        Return New XmlSerializer(GetType(Group), xOver)
    End Function
    
    Public Sub SerializeObject(ByVal filename As String)
        ' Create an instance of the XmlSerializer class.
        Dim mySerializer As XmlSerializer = CreateOverrider()
        ' Writing the file requires a TextWriter.
        Dim writer As New StreamWriter(filename)
        
        ' Create an instance of the class that will be serialized.
        Dim myGroup As New Group()
        
        ' Set the object properties.
        Dim m As New Member()
        m.MemberName = "Paul"
        myGroup.Members = New Member(0) {m}
        
        ' Serialize the class, and close the TextWriter.
        mySerializer.Serialize(writer, myGroup)
        writer.Close()
    End Sub    
    
    Public Sub DeserializeObject(ByVal filename As String)
        Dim mySerializer As XmlSerializer = CreateOverrider()
        Dim fs As New FileStream(filename, FileMode.Open)
        Dim myGroup As Group = CType(mySerializer.Deserialize(fs), Group)
        Dim m As Member
        For Each m In  myGroup.Members
            Console.WriteLine(m.MemberName)
        Next m
    End Sub
End Class

Comentarios

Hay dos maneras en que un campo público o una propiedad pública de lectura y escritura que devuelve una matriz se serializa mediante : XmlSerializerla serialización predeterminada y la serialización controlada.

En la serialización predeterminada, no se aplica ningún atributo al miembro. Cuando se serializa, la matriz se serializa como una secuencia anidada de elementos XML con el nombre del elemento XML de la secuencia anidada tomada del nombre del miembro.

Para controlar la serialización de forma más precisa, aplique un XmlArrayAttribute objeto al campo o a la propiedad . Por ejemplo, puede cambiar el nombre del elemento XML generado del valor predeterminado a otro estableciendo la ElementName propiedad en un nuevo valor.

La XmlArray propiedad permite invalidar la serialización predeterminada, así como la serialización controlada mediante la aplicación de al XmlArrayAttribute miembro . Por ejemplo, puede cambiar el nombre del elemento XML generado desde el valor predeterminado (el identificador de miembro) a un nuevo valor. Además, si aplica un XmlArrayAttribute elemento a un miembro, lo invalida cualquier XmlArrayAttribute que se asigne a la XmlArray propiedad .

Se aplica a

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