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XmlAttributes.XmlArray Propriété

Définition

Obtient ou définit un objet qui spécifie la façon dont XmlSerializer sérialise un champ public ou une propriété en lecture/écriture publique retournant un tableau.

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

Valeur de propriété

XmlArrayAttribute

XmlArrayAttribute qui spécifie la façon dont XmlSerializer sérialise un champ public ou une propriété en lecture/écriture publique qui retourne un tableau.

Exemples

L’exemple suivant sérialise une classe qui contient un champ nommé Members qui retourne un tableau d’objets. Il XmlArrayAttribute est utilisé pour remplacer la sérialisation du champ et renommer le nom Staffde l’élément en .

#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

Remarques

Il existe deux façons pour lesquelles une propriété de lecture/écriture publique ou de champ public qui retourne un tableau est sérialisée par les XmlSerializeréléments suivants : la sérialisation par défaut et la sérialisation contrôlée.

Dans la sérialisation par défaut, aucun attribut n’est appliqué au membre. En cas de sérialisation, le tableau est sérialisé en tant que séquence imbriquée d’éléments XML avec le nom de l’élément XML de la séquence imbriquée extraite du nom du membre.

Pour contrôler la sérialisation plus précisément, appliquez un champ ou une XmlArrayAttribute propriété. Par exemple, vous pouvez modifier le nom d’élément XML généré de la valeur par défaut vers un autre nom en définissant la ElementName propriété sur une nouvelle valeur.

La XmlArray propriété vous permet de remplacer la sérialisation par défaut, ainsi que la sérialisation contrôlée par l’application d’un XmlArrayAttribute membre. Par exemple, vous pouvez modifier le nom de l’élément XML généré à partir de l’identificateur de membre par défaut en une nouvelle valeur. En outre, si vous appliquez un XmlArrayAttribute membre, il est remplacé par tout XmlArrayAttribute élément affecté à la XmlArray propriété.

S’applique à