XmlEnumAttribute Constructors

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XmlEnumAttribute.cs

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XmlEnumAttribute.cs

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XmlEnumAttribute.cs

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XmlEnumAttribute.cs

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XmlEnumAttribute.cs

public:
 XmlEnumAttribute();

public XmlEnumAttribute();

Public Sub New ()

Voorbeelden

In het volgende voorbeeld worden twee klassen met de naam Food en FoodType. De FoodType klasse bevat twee opsommingen die worden overschreven en voor elke opsomming wordt een XmlEnumAttribute object gemaakt dat is toegewezen aan de XmlEnum eigenschap van een XmlAttributes object. In het voorbeeld wordt het XmlAttributes object vervolgens toegevoegd aan een XmlAttributeOverrides object, dat wordt gebruikt om een XmlSerializerobject te maken.

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

Opmerkingen

U kunt de XmlEnumAttribute functie gebruiken om een bestaande opsomming te overschrijven.

Zie ook

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

Bron:

XmlEnumAttribute.cs

Bron:

XmlEnumAttribute.cs

Bron:

XmlEnumAttribute.cs

Bron:

XmlEnumAttribute.cs

Bron:

XmlEnumAttribute.cs

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

public XmlEnumAttribute(string name);

public XmlEnumAttribute(string? name);

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

Public Sub New (name As String)

Parameters

Voorbeelden

In het volgende voorbeeld wordt de XmlEnumAttribute toepassing toegepast op de leden van een opsomming. Wanneer de XmlSerializer XML-gegevens voor deze opsomming worden gegenereerd, voldoen de gegevens aan de waarden van de Name eigenschappen.

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

Opmerkingen

Zie ook

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