XmlAttributes.XmlAttribute Properti

Definisi

Ruang nama:

System.Xml.Serialization

Rakitan:

netstandard.dll, System.Xml.XmlSerializer.dll

Sumber:

XmlAttributes.cs

Mendapatkan atau mengatur objek yang menentukan bagaimana XmlSerializer menserialisasikan bidang publik atau properti baca/tulis publik sebagai atribut XML.

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

public System.Xml.Serialization.XmlAttributeAttribute? XmlAttribute { get; set; }

member this.XmlAttribute : System.Xml.Serialization.XmlAttributeAttribute with get, set

Public Property XmlAttribute As XmlAttributeAttribute

Nilai Properti

XmlAttributeAttribute

Yang XmlAttributeAttribute mengontrol serialisasi bidang publik atau properti baca/tulis sebagai atribut XML.

Contoh

Contoh berikut menserialisasikan kelas bernama Group yang berisi properti bernama GroupName; properti diserialisasikan GroupName sebagai atribut XML. Contoh membuat XmlAttributeOverrides dan objek XmlAttributes untuk mengambil alih serialisasi default bidang. Contoh kemudian membuat XmlAttributeAttribute untuk secara khusus mengambil alih properti, dan objek diatur ke XmlAttribute properti Objek XmlAttributes ditambahkan ke XmlAttributeOverrides objek dengan nama anggota yang ditimpa yang ditentukan. Akhirnya, dibuat XmlSerializer dan dikembalikan menggunakan XmlAttributeOverrides objek .

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

// This is the class that will be serialized.
public class Group
{
   // This is the attribute that will be overridden.
   [XmlAttribute]
   public string GroupName;
   public int GroupNumber;
}

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

      /* Create an overriding XmlAttributeAttribute set it to
      the XmlAttribute property of the XmlAttributes object.*/
      XmlAttributeAttribute xAttribute = new XmlAttributeAttribute("SplinterName");
      xAttrs.XmlAttribute = xAttribute;

      // Add to the XmlAttributeOverrides. Specify the member name.
      xOver.Add(typeof(Group), "GroupName", 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 Name property, which will be generated
      as an XML attribute. */
      myGroup.GroupName = ".NET";
      myGroup.GroupNumber = 1;
      // 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);

      Console.WriteLine(myGroup.GroupName);
      Console.WriteLine(myGroup.GroupNumber);
   }
}

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


' This is the class that will be serialized.
Public Class Group
    ' This is the attribute that will be overridden.
    <XmlAttribute()> Public GroupName As String
    Public GroupNumber As Integer
End Class


Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("OverrideAttribute.xml")
        test.DeserializeObject("OverrideAttribute.xml")
    End Sub
    
    ' Return an XmlSerializer used for overriding. 
    Public Function CreateOverrider() As XmlSerializer
        ' Create the XmlAttributeOverrides and XmlAttributes objects.
        Dim xOver As New XmlAttributeOverrides()
        Dim xAttrs As New XmlAttributes()
        
        ' Create an overriding XmlAttributeAttribute set it to
        ' the XmlAttribute property of the XmlAttributes object.
        Dim xAttribute As New XmlAttributeAttribute("SplinterName")
        xAttrs.XmlAttribute = xAttribute
        
        ' Add to the XmlAttributeOverrides. Specify the member name.
        xOver.Add(GetType(Group), "GroupName", xAttrs)
        
        ' Create the XmlSerializer and return it.
        Return New XmlSerializer(GetType(Group), xOver)
    End Function 'CreateOverrider
    
    
    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 Name property, which will be generated
        ' as an XML attribute. 
        myGroup.GroupName = ".NET"
        myGroup.GroupNumber = 1
        ' 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)

        Console.WriteLine(myGroup.GroupName)
        Console.WriteLine(myGroup.GroupNumber)
    End Sub
End Class

Keterangan

Secara default, jika tidak ada atribut yang diterapkan ke bidang publik atau properti baca/tulis publik, atribut tersebut diserialisasikan sebagai elemen XML. Anda juga dapat menginstruksikan XmlSerializer untuk membuat atribut XML dengan menerapkan XmlAttributeAttribute ke bidang atau properti.

Properti XmlAttribute memungkinkan Anda untuk mengambil alih serialisasi default, serta serialisasi yang dikendalikan dengan menerapkan XmlAttributeAttribute ke anggota. Untuk melakukan ini, buat XmlAttributeAttribute dan atur propertinya (seperti AttributeName). Tetapkan objek baru ke XmlAttribute properti XmlAttributes objek. XmlAttributes Tambahkan objek ke XmlAttributeOverrides objek dan tentukan jenis objek yang berisi bidang atau properti, dan nama bidang atau properti. Terakhir, buat XmlSerializer menggunakan XmlAttributeOverrides objek dan panggil Serialize metode atau Deserialize .