XmlElementAttribute.DataType Propiedad

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

public string DataType { get; set; }

member this.DataType : string with get, set

Public Property DataType As String

Valor de propiedad

Un tipo de datos de esquema XML.

Excepciones

Ejemplos

En el ejemplo siguiente se serializa una clase denominada Group que contiene un campo denominado ExtraInfo, que devuelve un ArrayList. En el ejemplo se aplican dos instancias del XmlElementAttribute objeto al campo y se especifican valores diferentes DataType para cada instancia. Cada instancia permite XmlSerializer serializar los tipos especificados insertados en la matriz.

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

using namespace System;
using namespace System::Collections;
using namespace System::IO;
using namespace System::Xml::Serialization;
public ref class Group
{
public:

   /* Apply two XmlElementAttributes to the field. Set the DataType
      to string an int to allow the ArrayList to accept 
      both types. The Namespace is also set to different values
      for each type. */

   [XmlElement(DataType="string",
   Type=String::typeid,
   Namespace="http://www.cpandl.com"),
   XmlElement(DataType="snippet1>",
   Namespace="http://www.cohowinery.com",
   Type=Int32::typeid)]
   ArrayList^ ExtraInfo;
};

void SerializeObject( String^ filename )
{
   // A TextWriter is needed to write the file.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Create the XmlSerializer using the XmlAttributeOverrides.
   XmlSerializer^ s = gcnew XmlSerializer( Group::typeid );

   // Create the object to serialize.
   Group^ myGroup = gcnew Group;

   /* Add a string and an integer to the ArrayList returned
      by the ExtraInfo field. */
   myGroup->ExtraInfo = gcnew ArrayList;
   myGroup->ExtraInfo->Add( "hello" );
   myGroup->ExtraInfo->Add( 100 );

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

int main()
{
   SerializeObject( "ElementTypes.xml" );
}

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

public class Group
{
   /* Apply two XmlElementAttributes to the field. Set the DataType
      to string an int to allow the ArrayList to accept
      both types. The Namespace is also set to different values
      for each type. */
   [XmlElement(DataType = "string",
   Type = typeof(string),
   Namespace = "http://www.cpandl.com"),
   XmlElement(DataType = "int",
   Namespace = "http://www.cohowinery.com",
   Type = typeof(int))]
   public ArrayList ExtraInfo;
}

public class Run
{
    public static void Main()
    {
       Run test = new Run();
       test.SerializeObject("ElementTypes.xml");
          }

    public void SerializeObject(string filename)
    {
      // A TextWriter is needed to write the file.
      TextWriter writer = new StreamWriter(filename);

      // Create the XmlSerializer using the XmlAttributeOverrides.
      XmlSerializer s =
      new XmlSerializer(typeof(Group));

      // Create the object to serialize.
      Group myGroup = new Group();

      /* Add a string and an integer to the ArrayList returned
         by the ExtraInfo field. */
      myGroup.ExtraInfo = new ArrayList();
      myGroup.ExtraInfo.Add("hello");
      myGroup.ExtraInfo.Add(100);

      // Serialize the object and close the TextWriter.
      s.Serialize(writer,myGroup);
      writer.Close();
   }
}

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


Public Class Group
    ' Apply two XmlElementAttributes to the field. Set the DataType
    ' to string and int to allow the ArrayList to accept
    ' both types. The Namespace is also set to different values
    ' for each type. 
    <XmlElement(DataType := "string", _
        Type := GetType(String), _
        Namespace := "http://www.cpandl.com"), _
     XmlElement(DataType := "int", _                    
        Type := GetType(Integer), _
        Namespace := "http://www.cohowinery.com")> _
    Public ExtraInfo As ArrayList
End Class


Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("ElementTypes.xml")
    End Sub    
    
    Public Sub SerializeObject(filename As String)
        ' A TextWriter is needed to write the file.
        Dim writer As New StreamWriter(filename)
        
        ' Create the XmlSerializer using the XmlAttributeOverrides.
        Dim s As New XmlSerializer(GetType(Group))
        
        ' Create the object to serialize.
        Dim myGroup As New Group()
        
        ' Add a string and an integer to the ArrayList returned
        ' by the ExtraInfo field. 
        myGroup.ExtraInfo = New ArrayList()
        myGroup.ExtraInfo.Add("hello")
        myGroup.ExtraInfo.Add(100)
        
        ' Serialize the object and close the TextWriter.
        s.Serialize(writer, myGroup)
        writer.Close()
    End Sub
End Class

Comentarios

En la tabla siguiente se enumeran los tipos de datos simples de esquema XML con their.NET equivalentes.

Para los tipos de datos y esquema base64Binary XML, use una matriz de Byte estructuras y aplique un XmlElementAttribute con el DataType establecido en "base64Binary" o "hexBinary", según hexBinary corresponda. Para los tipos de datos y date esquema time XML, use el DateTime tipo y aplique con XmlElementAttribute el DataType establecido en "fecha" o "hora".

Para cada tipo de esquema XML asignado a una cadena, aplique con XmlElementAttribute su DataType propiedad establecida en el tipo de esquema XML. Es posible que esto pueda cambiar el formato de serialización, no solo el esquema del miembro.

Para obtener más información sobre los tipos de datos XML, vea el documento World Wide Web Consortium denominado Esquema XML Parte 2: Tipos de datos.

Se aplica a