XmlArrayAttribute.Namespace Propiedad

Referencia

Definición

Espacio de nombres:: System.Xml.Serialization

Ensamblado:: System.Xml.XmlSerializer.dll

Ensamblado:: System.Xml.dll

Ensamblado:: netstandard.dll

Source:: XmlArrayAttribute.cs

Source:: XmlArrayAttribute.cs

Source:: XmlArrayAttribute.cs

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 el espacio de nombres del elemento XML.

public:
 property System::String ^ Namespace { System::String ^ get(); void set(System::String ^ value); };

public string Namespace { get; set; }

public string? Namespace { get; set; }

member this.Namespace : string with get, set

Public Property Namespace As String

Valor de propiedad

String

Espacio de nombres del elemento XML.

Ejemplos

En el ejemplo siguiente se serializa una instancia de la Library clase que contiene dos miembros, uno que contiene títulos de libro y otro que contiene títulos periódicos. Aunque ambos elementos XML se denominan Titles, cada uno contiene un prefijo diferente. En el ejemplo también se incluye una instancia de la XmlSerializerNamespaces clase que contiene los espacios de nombres y prefijos usados para calificar los dos nombres de elemento.

#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 Book
{
public:
   String^ Title;
   String^ Author;
   String^ ISBN;

   [XmlAttributeAttribute]
   String^ Publisher;
};

public ref class Periodical
{
private:
   String^ title;

public:

   property String^ Title 
   {
      String^ get()
      {
         return title;
      }
      void set( String^ value )
      {
         title = value;
      }
   }
};

public ref class Library
{
private:
   array<Book^>^books;
   array<Periodical^>^periodicals;

public:

   /* This element will be qualified with the prefix 
      that is associated with the namespace http://wwww.cpandl.com. */
   [XmlArray(ElementName="Titles",
   Namespace="http://wwww.cpandl.com")]
   property array<Book^>^ Books 
   {
      array<Book^>^ get()
      {
         return books;
      }
      void set( array<Book^>^value )
      {
         books = value;
      }
   }

   /* This element will be qualified with the prefix that is
      associated with the namespace http://www.proseware.com. */
   [XmlArray(ElementName="Titles",Namespace=
   "http://www.proseware.com")]
   property array<Periodical^>^ Periodicals 
   {
      array<Periodical^>^ get()
      {
         return periodicals;
      }
      void set( array<Periodical^>^value )
      {
         periodicals = value;
      }
   }
};

void WriteBook( String^ filename )
{
   // Creates a new XmlSerializer.
   XmlSerializer^ mySerializer = gcnew XmlSerializer( Library::typeid );

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

   /* Creates an XmlSerializerNamespaces and adds prefixes and 
      namespaces to be used. */
   XmlSerializerNamespaces^ myNamespaces = gcnew XmlSerializerNamespaces;
   myNamespaces->Add( "books", "http://wwww.cpandl.com" );
   myNamespaces->Add( "magazines", "http://www.proseware.com" );

   // Creates an instance of the class to be serialized.
   Library^ myLibrary = gcnew Library;

   // Creates two book objects.
   Book^ b1 = gcnew Book;
   b1->Title = "My Book Title";
   b1->Author = "An Author";
   b1->ISBN = "000000000";
   b1->Publisher = "Microsoft Press";
   Book^ b2 = gcnew Book;
   b2->Title = "Another Book Title";
   b2->Author = "Another Author";
   b2->ISBN = "00000001";
   b2->Publisher = "Another Press";

   /* Creates an array using the objects, and sets the Books property
      to the array. */
   array<Book^>^myBooks = {b1,b2};
   myLibrary->Books = myBooks;

   // Creates two Periodical objects.
   Periodical^ per1 = gcnew Periodical;
   per1->Title = "My Magazine Title";
   Periodical^ per2 = gcnew Periodical;
   per2->Title = "Another Magazine Title";

   // Sets the Periodicals property to the array. 
   array<Periodical^>^myPeridocials = {per1,per2};
   myLibrary->Periodicals = myPeridocials;

   // Serializes the myLibrary object.
   mySerializer->Serialize( myStreamWriter, myLibrary, myNamespaces );
   myStreamWriter->Close();
}

void ReadBook( String^ filename )
{
   /* Creates an instance of an XmlSerializer
      with the class used to read the document. */
   XmlSerializer^ mySerializer = gcnew XmlSerializer( Library::typeid );

   // A FileStream is needed to read the file.
   FileStream^ myFileStream = gcnew FileStream( filename,FileMode::Open );
   Library^ myLibrary = dynamic_cast<Library^>(mySerializer->Deserialize( myFileStream ));

   // Reads each book in the array returned by the Books property.      
   for ( int i = 0; i < myLibrary->Books->Length; i++ )
   {
      Console::WriteLine( myLibrary->Books[ i ]->Title );
      Console::WriteLine( myLibrary->Books[ i ]->Author );
      Console::WriteLine( myLibrary->Books[ i ]->ISBN );
      Console::WriteLine( myLibrary->Books[ i ]->Publisher );
      Console::WriteLine();
   }
   for ( int i = 0; i < myLibrary->Periodicals->Length; i++ )
   {
      Console::WriteLine( myLibrary->Periodicals[ i ]->Title );
   }
}

int main()
{
   WriteBook( "MyLibrary.xml" );
   ReadBook( "MyLibrary.xml" );
}

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

public class Library
   {
   private Book[] books;
   private Periodical [] periodicals;
   /* This element will be qualified with the prefix
   that is associated with the namespace http://wwww.cpandl.com. */
   [XmlArray(ElementName = "Titles",
   Namespace="http://wwww.cpandl.com")]
   public Book[] Books
   {
      get{return books;}
      set{books = value;}
   }
   /* This element will be qualified with the prefix that is
   associated with the namespace http://www.proseware.com. */
   [XmlArray(ElementName = "Titles", Namespace =
   "http://www.proseware.com")]
   public Periodical[] Periodicals
   {
      get{return periodicals;}
      set{periodicals = value;}
   }
}

public class Book
{
   public string Title;
   public string Author;
   public string ISBN;
   [XmlAttribute]
   public string Publisher;
}

public class Periodical
{
   private string title;
   public string Title
   {
      get{return title;}
      set{title = value;}
   }
}

public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.WriteBook("MyLibrary.xml");
      test.ReadBook("MyLibrary.xml");
   }

   public void WriteBook(string filename)
   {
      // Creates a new XmlSerializer.
      XmlSerializer mySerializer = new XmlSerializer(typeof(Library));
      // Writing the file requires a StreamWriter.
      TextWriter myStreamWriter = new StreamWriter(filename);
      /* Creates an XmlSerializerNamespaces and adds prefixes and
      namespaces to be used. */
      XmlSerializerNamespaces myNamespaces =
      new XmlSerializerNamespaces();
      myNamespaces.Add("books", "http://wwww.cpandl.com");
      myNamespaces.Add("magazines", "http://www.proseware.com");
      // Creates an instance of the class to be serialized.
      Library myLibrary = new Library();

      // Creates two book objects.
      Book b1 = new Book();
      b1.Title = "My Book Title";
      b1.Author = "An Author";
      b1.ISBN = "000000000";
      b1.Publisher = "Microsoft Press";

      Book b2 = new Book();
      b2.Title = "Another Book Title";
      b2.Author = "Another Author";
      b2.ISBN = "00000001";
      b2.Publisher = "Another Press";

      /* Creates an array using the objects, and sets the Books property
      to the array. */
      Book[] myBooks = {b1,b2};
      myLibrary.Books = myBooks;

      // Creates two Periodical objects.
      Periodical per1 = new Periodical();
      per1.Title = "My Magazine Title";
      Periodical per2 = new Periodical();
      per2.Title = "Another Magazine Title";

      // Sets the Periodicals property to the array.
      Periodical[] myPeridocials = {per1, per2};
      myLibrary.Periodicals = myPeridocials;

      // Serializes the myLibrary object.
      mySerializer.Serialize(myStreamWriter, myLibrary, myNamespaces);

       myStreamWriter.Close();
    }

   public void ReadBook(string filename)
   {
      /* Creates an instance of an XmlSerializer
      with the class used to read the document. */
      XmlSerializer mySerializer = new XmlSerializer(typeof(Library));
      // A FileStream is needed to read the file.
      FileStream myFileStream = new FileStream(filename, FileMode.Open);

      Library myLibrary = (Library) mySerializer.Deserialize(myFileStream);

      // Reads each book in the array returned by the Books property.
      for(int i = 0; i< myLibrary.Books.Length;i++)
      {
         Console.WriteLine(myLibrary.Books[i].Title);
         Console.WriteLine(myLibrary.Books[i].Author);
         Console.WriteLine(myLibrary.Books[i].ISBN);
         Console.WriteLine(myLibrary.Books[i].Publisher);
         Console.WriteLine();
      }
      // Reads each Periodical returned by the Periodicals property.
      for(int i = 0; i< myLibrary.Periodicals.Length;i++)
      {
         Console.WriteLine(myLibrary.Periodicals[i].Title);
      }
   }
}

Option Explicit
Option Strict

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



Public Class Library
    Private myBooks() As Book
    Private myPeriodicals() As Periodical
    
    ' This element will be qualified with the prefix
    ' that is associated with the namespace http://wwww.cpandl.com.    
    <XmlArray(ElementName := "Titles", _
        Namespace := "http://wwww.cpandl.com")> _ 
    Public Property Books() As Book()
        Get
            Return myBooks
        End Get
        Set
            myBooks = value
        End Set
    End Property

    ' This element will be qualified with the prefix that is
    ' associated with the namespace http://www.proseware.com.    
    <XmlArray(ElementName := "Titles", _
        Namespace := "http://www.proseware.com")> _
    Public Property Periodicals() As Periodical()
        Get
            Return myPeriodicals
        End Get
        Set
            myPeriodicals = value
        End Set
    End Property
End Class
 
Public Class Book
    Public Title As String
    Public Author As String
    Public ISBN As String
    <XmlAttribute()> Public Publisher As String
End Class

Public Class Periodical
    Private myTitle As String
    
    Public Property Title() As String
        Get
            Return myTitle
        End Get
        Set
            myTitle = value
        End Set
    End Property
End Class
 
Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.WriteBook("MyLibrary.xml")
        test.ReadBook("MyLibrary.xml")
    End Sub
    
    
    Public Sub WriteBook(ByVal filename As String)
        ' Creates a new XmlSerializer.
        Dim mySerializer As New XmlSerializer(GetType(Library))
        ' Writing the file requires a StreamWriter.
        Dim myStreamWriter As New StreamWriter(filename)
        ' Creates an XmlSerializerNamespaces and adds prefixes and
        ' namespaces to be used. 
        Dim myNamespaces As New XmlSerializerNamespaces()
        myNamespaces.Add("books", "http://wwww.cpandl.com")
        myNamespaces.Add("magazines", "http://www.proseware.com")
        ' Create an instance of the class to be serialized.
        Dim myLibrary As New Library()
        
        ' Creates two book objects.
        Dim b1 As New Book()
        b1.Title = "My Book Title"
        b1.Author = "An Author"
        b1.ISBN = "000000000"
        b1.Publisher = "Microsoft Press"
        
        Dim b2 As New Book()
        b2.Title = "Another Book Title"
        b2.Author = "Another Author"
        b2.ISBN = "00000001"
        b2.Publisher = "Another Press"
        
        ' Creates an array using the objects, and sets the Books property
        ' to the array. 
        Dim myBooks As Book() =  {b1, b2}
        myLibrary.Books = myBooks
        
        ' Creates two Periodical objects.
        Dim per1 As New Periodical()
        per1.Title = "My Magazine Title"
        Dim per2 As New Periodical()
        per2.Title = "Another Magazine Title"
        
        ' Sets the Periodicals property to the array. 
        Dim myPeriodicals() As Periodical =  {per1, per2}
        myLibrary.Periodicals = myPeriodicals
        
        ' Serializes the myLibrary object.
        mySerializer.Serialize(myStreamWriter, myLibrary, myNamespaces)
        
        myStreamWriter.Close()
    End Sub
    
    
    Public Sub ReadBook(ByVal filename As String)
        ' Creates an instance of an XmlSerializer
        ' with the class used to read the document. 
        Dim mySerializer As New XmlSerializer(GetType(Library))
        
        ' A FileStream is needed to read the file.
        Dim myFileStream As New FileStream(filename, FileMode.Open)
        
        Dim myLibrary As Library = _
            CType(mySerializer.Deserialize(myFileStream), Library)
        
        ' Reads each book in the array returned by the Books property.      
        Dim i As Integer
        For i = 0 To myLibrary.Books.Length - 1
            Console.WriteLine(myLibrary.Books(i).Title)
            Console.WriteLine(myLibrary.Books(i).Author)
            Console.WriteLine(myLibrary.Books(i).ISBN)
            Console.WriteLine(myLibrary.Books(i).Publisher)
            Console.WriteLine()
        Next i
        
        ' Reads each Periodical returned by the Periodicals property.
        For i = 0 To myLibrary.Periodicals.Length - 1
            Console.WriteLine(myLibrary.Periodicals(i).Title)
        Next i
    End Sub
End Class

Comentarios

La Namespace propiedad permite crear nombres de elementos XML completos. La Namespace propiedad se ajusta a las reglas para crear un espacio de nombres XML tal y como se encuentra en el documento world Wide Web Consortium de 1999 titulado Espacios de nombres en XML.

Para crear espacios de nombres asociados a un prefijo, debe crear una instancia de la XmlSerializerNamespaces clase que contenga los espacios de nombres y prefijos usados en el documento XML. Al establecer el espacio de nombres para cada XmlArrayAttribute, debe coincidir con uno de los espacios de nombres de XmlSerializerNamespaces. Cuando se genera el XML, cada matriz se prefijo correctamente con el prefijo asociado al espacio de nombres especificado.

Se aplica a

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