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XmlEnumAttribute Constructor ()

Initializes a new instance of the XmlEnumAttribute class.

Namespace: System.Xml.Serialization
Assembly: System.Xml (in system.xml.dll)

public XmlEnumAttribute ()
public XmlEnumAttribute ()
public function XmlEnumAttribute ()

You can use the XmlEnumAttribute to override an existing enumeration.

NoteNote

You can use the word XmlEnum in your code instead of the longer XmlEnumAttribute.

The following example serializes two classes named Food and FoodType. The FoodType class contains two enumerations that are overridden and, for each enumeration, the example creates an XmlEnumAttribute object that is assigned to the XmlEnum property of an XmlAttributes object. The example then adds the XmlAttributes object to an XmlAttributeOverrides object, which is used to create an 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);
   }
}


import System.*;
import System.IO.*;
import System.Xml.*;
import System.Xml.Serialization.*;

// This is the class that will be serialized.
public class Food
{
    public FoodType type;
    Food()
    {
        type = new FoodType();
    } //Food
} //Food

public class FoodType
{
    public int member;
    FoodType()
    {
        member = 0;
    } //FoodType
    public int get_member()
    {
        return member;
    } //get_member

    public void set_member(int n)
    {
        member = n;
    } //set_member

    public String getMemberType()
    {
        if (member == 0) {
            return "low";
        }
        else {
            return "high";
        }
    } //getMemberType    
    public static int low = 0;
    public static int high = 1;
} //FoodType

public class Run
{
    public static void main(String[] args)
    {
        Run test = new Run();
        test.SerializeObject("OverrideEnum.xml");
        test.DeserializeObject("OverrideEnum.xml");
    } //main
    // 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.
        XmlEnumAttribute xEnum = new XmlEnumAttribute();

        xEnum.set_Name("Cold");
        xAttrs.set_XmlEnum(xEnum);
        xOver.Add(FoodType.class.ToType(), "low", xAttrs);

        // Add an XmlEnumAttribute for the FoodType.high.
        xAttrs = new XmlAttributes();
        xEnum = new XmlEnumAttribute();
        xEnum.set_Name("Hot");
        xAttrs.set_XmlEnum(xEnum);
        xOver.Add(FoodType.class.ToType(), "high", xAttrs);

        // Create the XmlSerializer, and return it.
        return new XmlSerializer(Food.class.ToType(), xOver);
    } //CreateOverrider

    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.set_member(FoodType.high);

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

    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.getMemberType());
    } //DeserializeObject
} //Run

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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