如何将枚举值序列化为int?

时间:2009-02-03 08:40:28

标签: .net enums xml-serialization

我想将我的枚举值序列化为int,但我只得到这个名字。

这是我的(示例)类和枚举:

public class Request {
    public RequestType request;
}

public enum RequestType
{
    Booking = 1,
    Confirmation = 2,
    PreBooking = 4,
    PreBookingConfirmation = 5,
    BookingStatus = 6
}

代码(只是为了确保我做错了)

Request req = new Request();
req.request = RequestType.Confirmation;
XmlSerializer xml = new XmlSerializer(req.GetType());
StringWriter writer = new StringWriter();
xml.Serialize(writer, req);
textBox1.Text = writer.ToString();

This answer(对于另一个问题)似乎表明枚举应该序列化为默认值,但它似乎没有这样做。这是我的输出:

<?xml version="1.0" encoding="utf-16"?>
<Request xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <request>Confirmation</request>
</Request>

我能够通过在每个值上加上“[XmlEnum(”X“)]”属性来序列化为值,但这似乎不对。

6 个答案:

答案 0 :(得分:134)

最简单的方法是使用[XmlEnum]属性,如下所示:

[Serializable]
public enum EnumToSerialize
{
    [XmlEnum("1")]
    One = 1,
    [XmlEnum("2")]
    Two = 2
}

这将序列化为XML(比如父类是CustomClass),如下所示:

<CustomClass>
  <EnumValue>2</EnumValue>
</CustomClass>

答案 1 :(得分:67)

大多数时候,人们想要名字,而不是整数。您可以为此目的添加垫片属性吗?

[XmlIgnore]
public MyEnum Foo {get;set;}

[XmlElement("Foo")]
[EditorBrowsable(EditorBrowsableState.Never), Browsable(false)]
public int FooInt32 {
    get {return (int)Foo;}
    set {Foo = (MyEnum)value;}
}

或者您可以使用IXmlSerializable,但这需要做很多工作。

答案 2 :(得分:13)

请参阅下面的完整示例控制台应用程序,以获得使用DataContractSerializer实现所需内容的有趣方法:

using System;
using System.IO;
using System.Runtime.Serialization;

namespace ConsoleApplication1
{
    [DataContract(Namespace="petermcg.wordpress.com")]
    public class Request
    {
        [DataMember(EmitDefaultValue = false)]
        public RequestType request;
    }

    [DataContract(Namespace = "petermcg.wordpress.com")]
    public enum RequestType
    {
        [EnumMember(Value = "1")]
        Booking = 1,
        [EnumMember(Value = "2")]
        Confirmation = 2,
        [EnumMember(Value = "4")]
        PreBooking = 4,
        [EnumMember(Value = "5")]
        PreBookingConfirmation = 5,
        [EnumMember(Value = "6")]
        BookingStatus = 6
    }

    class Program
    {
        static void Main(string[] args)
        {
            DataContractSerializer serializer = new DataContractSerializer(typeof(Request));

            // Create Request object
            Request req = new Request();
            req.request = RequestType.Confirmation;

            // Serialize to File
            using (FileStream fileStream = new FileStream("request.txt", FileMode.Create))
            {
                serializer.WriteObject(fileStream, req);
            }

            // Reset for testing
            req = null;

            // Deserialize from File
            using (FileStream fileStream = new FileStream("request.txt", FileMode.Open))
            {
                req = serializer.ReadObject(fileStream) as Request;
            }

            // Writes True
            Console.WriteLine(req.request == RequestType.Confirmation);
        }
    }
}

在调用WriteObject后,request.txt的内容如下:

<Request xmlns="petermcg.wordpress.com" xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
    <request>2</request>
</Request>

您需要为DataContractSerializer引用System.Runtime.Serialization.dll程序集。

答案 3 :(得分:2)

<Window x:Class="WpfApplication1.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        mc:Ignorable="d"
        Title="MainWindow" Height="300" Width="300">
    <StackPanel x:Name="stackPanel">

    </StackPanel>
</Window>

上述方法对我有用。

答案 4 :(得分:0)

由于您要为枚举选项分配显式非连续值,我假设您希望能够一次指定多个值(二进制标志),因此接受的答案是您唯一的选择。通过PreBooking | PreBookingConfirmation将有一个9的整数值,并且序列化程序将无法反序列化它,使用shim属性将其强制转换但是效果很好。或许你只是错过了3值:)

答案 5 :(得分:-1)

查看System.Enum类。 Parse方法将字符串或int表示转换为Enum对象,ToString方法将Enum对象转换为可以序列化的字符串。