.NET Xml序列化程序可选属性

Question

鉴于以下代码......

[XmlType("Field")]
public class SearchField
{
    [XmlAttribute("alias")]
    public string Alias;

    [XmlAttribute("entity")]
    public string Entity;
}

别名是我们的可选字段,但是当xml中缺少"alias"属性时,反序列化器会抛出.你如何让它成为可选的？是否需要架构？

Answer 1

很奇怪,因为以下程序对我来说没问题,没有任何投掷:

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

[XmlType("Field")]
public class SearchField
{
    [XmlAttribute("alias")]
    public string Alias;

    [XmlAttribute("entity")]
    public string Entity;
}

class Program
{
    static void Main()
    {
        using (var reader = new StringReader("<Field entity=\"en\" />"))
        {
            var serializer = new XmlSerializer(typeof(SearchField));
            var s = (SearchField)serializer.Deserialize(reader);
            Console.WriteLine(s.Alias);
            Console.WriteLine(s.Entity);
        }
    }
}

如您所见,alias输入XML中省略了该属性,但反序列化没有问题.