XmlTextAttribute Costruttori

Definizione

Spazio dei nomi:

System.Xml.Serialization

Assembly:

netstandard.dll, System.Xml.ReaderWriter.dll

Inizializza una nuova istanza della classe XmlTextAttribute.

Overload

Nome	Descrizione
XmlTextAttribute()	Inizializza una nuova istanza della classe XmlTextAttribute.
XmlTextAttribute(Type)	Inizializza una nuova istanza della classe XmlTextAttribute.

XmlTextAttribute()

Origine:

XmlTextAttribute.cs

Inizializza una nuova istanza della classe XmlTextAttribute.

public:
 XmlTextAttribute();

public XmlTextAttribute();

Public Sub New ()

Esempio

L'esempio seguente serializza una classe che contiene un campo pubblico, denominato Comment. Nell'esempio viene applicato un XmlTextAttribute oggetto al campo , eseguendo l'override della serializzazione come elemento XML e serializzandolo come testo XML.

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

public class Group {
    public string GroupName;
    public string Comment;
}

public class Test {
    public static void Main() {
        Test t = new Test();
        t.SerializerOrder("TextOverride.xml");
    }
    /* Create an instance of the XmlSerializer class that overrides
       the default way it serializes an object. */
    public XmlSerializer CreateOverrider() {
        /* Create instances of the XmlAttributes and
        XmlAttributeOverrides classes. */

        XmlAttributes attrs = new XmlAttributes();

        XmlAttributeOverrides xOver = new XmlAttributeOverrides();

        /* Create an XmlTextAttribute to override the default
        serialization process. */
        XmlTextAttribute xText = new XmlTextAttribute();
        attrs.XmlText = xText;

        // Add the XmlAttributes to the XmlAttributeOverrides.
        xOver.Add(typeof(Group), "Comment", attrs);

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

    public void SerializerOrder(string filename) {
        // Create an XmlSerializer instance.
        XmlSerializer xSer = CreateOverrider();

        // Create the object and serialize it.
        Group myGroup = new Group();
        myGroup.Comment = "This is a great product.";

        TextWriter writer = new StreamWriter(filename);
        xSer.Serialize(writer, myGroup);
    }
}

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


Public Class Group
    Public GroupName As String
    Public Comment As String
End Class

Public Class Test
    
    Public Shared Sub Main()
        Dim t As New Test()
        t.SerializerOrder("TextOverride.xml")
    End Sub
    
    ' Create an instance of the XmlSerializer class that overrides
    ' the default way it serializes an object. 
    Public Function CreateOverrider() As XmlSerializer
        ' CreatE instances of the XmlAttributes and
        ' XmlAttributeOverrides classes.
        
        Dim attrs As New XmlAttributes()        
        Dim xOver As New XmlAttributeOverrides()
        
        ' Create an XmlTextAttribute to override the default
        ' serialization process. 
        Dim xText As New XmlTextAttribute()
        attrs.XmlText = xText
        
        ' Add the XmlAttributes to the XmlAttributeOverrides.
        xOver.Add(GetType(Group), "Comment", attrs)
        
        ' Create the XmlSerializer, and return it.
        Dim xSer As New XmlSerializer(GetType(Group), xOver)
        Return xSer
    End Function
    
    
    Public Sub SerializerOrder(ByVal filename As String)
        ' Create an XmlSerializer instance.
        Dim xSer As XmlSerializer = CreateOverrider()
        
        ' Create the object and serialize it.
        Dim myGroup As New Group()
        myGroup.Comment = "This is a great product."
        
        Dim writer As New StreamWriter(filename)
        xSer.Serialize(writer, myGroup)
    End Sub
End Class

Commenti

È possibile eseguire l'override del modo in cui serializza XmlSerializer un campo pubblico o una proprietà pubblica di lettura/scrittura creando un oggetto XmlAttributese impostandone la XmlText proprietà su un oggetto XmlTextAttribute. Per ulteriori dettagli, vedere la classe XmlAttributeOverrides.

XmlTextAttribute(Type)

Origine:

XmlTextAttribute.cs

Inizializza una nuova istanza della classe XmlTextAttribute.

public:
 XmlTextAttribute(Type ^ type);

public XmlTextAttribute(Type? type);

new System.Xml.Serialization.XmlTextAttribute : Type -> System.Xml.Serialization.XmlTextAttribute

Public Sub New (type As Type)

Parametri

type

Type

Type del membro da serializzare.

Esempio

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

public class Group1{
   // The XmlTextAttribute with type set to string informs the
   // XmlSerializer that strings should be serialized as XML text.
   [XmlText(typeof(string))]
   [XmlElement(typeof(int))]
   [XmlElement(typeof(double))]
   public object [] All= new object []{321, "One", 2, 3.0, "Two" };
}

public class Group2{
   [XmlText(Type = typeof(GroupType))]
   public GroupType Type;
}
public enum GroupType{
   Small,
   Medium,
   Large
}

public class Group3{
   [XmlText(Type=typeof(DateTime))]
   public DateTime CreationTime = DateTime.Now;
}

public class Test{
   static void Main(){
      Test t = new Test();
      t.SerializeArray("XmlText1.xml");
      t.SerializeEnum("XmlText2.xml");
      t.SerializeDateTime("XmlText3.xml");
   }

   private void SerializeArray(string filename){
      XmlSerializer ser = new XmlSerializer(typeof(Group1));
      Group1 myGroup1 = new Group1();

      TextWriter writer = new StreamWriter(filename);

      ser.Serialize(writer, myGroup1);
      writer.Close();
   }

   private void SerializeEnum(string filename){
      XmlSerializer ser = new XmlSerializer(typeof(Group2));
      Group2 myGroup = new Group2();
      myGroup.Type = GroupType.Medium;
      TextWriter writer = new StreamWriter(filename);

      ser.Serialize(writer, myGroup);
      writer.Close();
   }

   private void SerializeDateTime(string filename){
      XmlSerializer ser = new XmlSerializer(typeof(Group3));
      Group3 myGroup = new Group3();
      TextWriter writer = new StreamWriter(filename);

      ser.Serialize(writer, myGroup);
      writer.Close();
   }
}

Imports System.Xml.Serialization
Imports System.IO


Public Class Group1
   ' The XmlTextAttribute with type set to String informs the 
   ' XmlSerializer that strings should be serialized as XML text.
   <XmlText(GetType(String)), _
   XmlElement(GetType(integer)), _  
   XmlElement(GetType(double))> _
   public All () As Object = _
   New Object (){321, "One", 2, 3.0, "Two" }
End Class


Public Class Group2
   <XmlText(GetType(GroupType))> _
   public Type As GroupType 
End Class

Public Enum GroupType
   Small
   Medium
   Large
End Enum

Public Class Group3
   <XmlText(GetType(DateTime))> _
   Public CreationTime As DateTime = DateTime.Now
End Class

Public Class Test
   Shared Sub Main()
      Dim t As Test = New Test()
      t.SerializeArray("XmlText1.xml")
      t.SerializeEnum("XmlText2.xml")
      t.SerializeDateTime("XmlText3.xml")
   End Sub

   Private Sub SerializeArray(filename As String)
      Dim ser As XmlSerializer = New XmlSerializer(GetType(Group1))
      Dim myGroup1 As Group1 = New Group1()

      Dim writer As TextWriter = New StreamWriter(filename)

      ser.Serialize(writer, myGroup1)
      writer.Close()
   End Sub

   Private Sub SerializeEnum(filename As String)
      Dim ser As XmlSerializer = New XmlSerializer(GetType(Group2))
      Dim myGroup As Group2 = New Group2()
      myGroup.Type = GroupType.Medium
      Dim writer As TextWriter = New StreamWriter(filename)

      ser.Serialize(writer, myGroup)
      writer.Close()
   End Sub

   Private Sub SerializeDateTime(filename As String)
      Dim ser As XmlSerializer = new XmlSerializer(GetType(Group3))
      Dim myGroup As Group3 = new Group3()
      Dim writer As TextWriter = new StreamWriter(filename)

      ser.Serialize(writer, myGroup)
      writer.Close()
   End Sub
End Class

Commenti

È possibile eseguire l'override del modo in cui serializza XmlSerializer un campo pubblico o una proprietà pubblica di lettura/scrittura creando un oggetto XmlAttributese impostandone la XmlText proprietà su un oggetto XmlTextAttribute. Per ulteriori dettagli, vedere la classe XmlAttributeOverrides.