XmlEnumAttribute Konstruktor

Definisi

Ruang nama:

System.Xml.Serialization

Rakitan:

netstandard.dll, System.Xml.ReaderWriter.dll

Menginisialisasi instans baru dari kelas XmlEnumAttribute.

Overload

Nama	Deskripsi
XmlEnumAttribute()	Menginisialisasi instans baru dari kelas XmlEnumAttribute.
XmlEnumAttribute(String)	Menginisialisasi instans XmlEnumAttribute baru kelas, dan menentukan nilai XML yang XmlSerializer dihasilkan atau dikenali (saat menserialisasikan atau mendeserialisasi enumerasi, masing-masing).

XmlEnumAttribute()

Sumber:

XmlEnumAttribute.cs

Menginisialisasi instans baru dari kelas XmlEnumAttribute.

public:
 XmlEnumAttribute();

public XmlEnumAttribute();

Public Sub New ()

Contoh

Contoh berikut menserialisasikan dua kelas bernama Food dan FoodType. Kelas FoodType berisi dua enumerasi yang ditimpa dan, untuk setiap enumerasi, contoh membuat XmlEnumAttribute objek yang ditetapkan ke XmlEnum properti XmlAttributes objek. Contoh kemudian menambahkan objek ke XmlAttributesXmlAttributeOverrides objek, yang digunakan untuk membuat XmlSerializer.

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

// This is the class that will be serialized.
public class Food
{
   public FoodType Type;
}

public enum FoodType
{
   // Subsequent code overrides these enumerations.
   Low,
   High
}

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

   // Return an XmlSerializer used for overriding.
   public XmlSerializer CreateOverrider()
   {
      // Create the XmlOverrides and XmlAttributes objects.
      XmlAttributeOverrides xOver = new XmlAttributeOverrides();
      XmlAttributes xAttrs = new XmlAttributes();

      // Add an XmlEnumAttribute for the FoodType.Low enumeration.
      XmlEnumAttribute xEnum = new XmlEnumAttribute();
      xEnum.Name = "Cold";
      xAttrs.XmlEnum = xEnum;
      xOver.Add(typeof(FoodType), "Low", xAttrs);

      // Add an XmlEnumAttribute for the FoodType.High enumeration.
      xAttrs = new XmlAttributes();
      xEnum = new XmlEnumAttribute();
      xEnum.Name = "Hot";
      xAttrs.XmlEnum = xEnum;
      xOver.Add(typeof(FoodType), "High", xAttrs);

      // Create the XmlSerializer, and return it.
      return new XmlSerializer(typeof(Food), 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.
      Food myFood = new Food();

      // Set the object properties.
      myFood.Type = FoodType.High;

      // Serialize the class, and close the TextWriter.
      mySerializer.Serialize(writer, myFood);
      writer.Close();
   }

   public void DeserializeObject(string filename)
   {
      XmlSerializer mySerializer = CreateOverrider();
      FileStream fs = new FileStream(filename, FileMode.Open);
      Food myFood = (Food)
      mySerializer.Deserialize(fs);

      Console.WriteLine(myFood.Type);
   }
}

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


' This is the class that will be serialized.
Public Class Food
    Public Type As FoodType
End Class

Public Enum FoodType
    ' Subsequent code overrides these enumerations.
    Low
    High
End Enum



Public Class Run
    
    Public Shared Sub Main()
        Dim test As New Run()
        test.SerializeObject("OverrideEnum.xml")
        test.DeserializeObject("OverrideEnum.xml")
    End Sub    
    
    ' Return an XmlSerializer used for overriding. 
    Public Function CreateOverrider() As XmlSerializer
        ' Create the XmlOverrides and XmlAttributes objects.
        Dim xOver As New XmlAttributeOverrides()
        Dim xAttrs As New XmlAttributes()
        
        ' Add an XmlEnumAttribute for the FoodType.Low enumeration.
        Dim xEnum As New XmlEnumAttribute()
        xEnum.Name = "Cold"
        xAttrs.XmlEnum = xEnum
        xOver.Add(GetType(FoodType), "Low", xAttrs)
        
        ' Add an XmlEnumAttribute for the FoodType.High enumeration.
        xAttrs = New XmlAttributes()
        xEnum = New XmlEnumAttribute()
        xEnum.Name = "Hot"
        xAttrs.XmlEnum = xEnum
        xOver.Add(GetType(FoodType), "High", xAttrs)
        
        ' Create the XmlSerializer, and return it.
        Return New XmlSerializer(GetType(Food), 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 myFood As New Food()
        
        ' Set the object properties.
        myFood.Type = FoodType.High
        
        ' Serialize the class, and close the TextWriter.
        mySerializer.Serialize(writer, myFood)
        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 myFood As Food = CType(mySerializer.Deserialize(fs), Food)
        
        Console.WriteLine(myFood.Type)
    End Sub
End Class

Keterangan

Anda dapat menggunakan XmlEnumAttribute untuk mengambil alih enumerasi yang ada.

Nota

Anda dapat menggunakan kata XmlEnum dalam kode Anda alih-alih lebih lama XmlEnumAttribute.

Lihat juga

• Serialize(TextWriter, Object)
• Deserialize(Stream)
• XmlSerializer

XmlEnumAttribute(String)

Sumber:

XmlEnumAttribute.cs

Menginisialisasi instans XmlEnumAttribute baru kelas, dan menentukan nilai XML yang XmlSerializer dihasilkan atau dikenali (saat menserialisasikan atau mendeserialisasi enumerasi, masing-masing).

public:
 XmlEnumAttribute(System::String ^ name);

public XmlEnumAttribute(string? name);

new System.Xml.Serialization.XmlEnumAttribute : string -> System.Xml.Serialization.XmlEnumAttribute

Public Sub New (name As String)

Parameter

name

String

Nama penggantian anggota enumerasi.

Contoh

Contoh berikut menerapkan XmlEnumAttribute ke anggota enumerasi. XmlSerializer Saat menghasilkan data XML untuk enumerasi ini, data sesuai dengan nilai Name properti.

public enum EmployeeStatus
{
   [XmlEnum("Single")]
   One,
   [XmlEnum("Double")]
   Two,
   [XmlEnum("Triple")]
   Three
}

Public Enum EmployeeStatus
   <XmlEnumAttribute("Single")> One
   <XmlEnumAttribute("Double")> Two
   <XmlEnumAttribute("Triple")> Three
End Enum

Keterangan

Nota

Anda dapat menggunakan kata XmlEnum dalam kode Anda alih-alih lebih lama XmlEnumAttribute.

Lihat juga

• Serialize(TextWriter, Object)
• Deserialize(Stream)
• XmlSerializer