我不确定如何最好地组织数据,以便它可以由XML Serializer序列化

时间:2014-04-24 19:30:11

标签: c# xml object serialization dictionary

我有一个设置结构,其中包含namedescriptiontypestrings,以及valueObject 。现在有一个包含一系列设置的类。这个类基本上充当了一个工厂,它创建了一些对象,然后应该包含这些settings指向键的列表/数组。我最好的想法是创建一个这样的字典:Dictionary<KeyCode, Setting[]>或更好Dictionary<KeyCode, Dictionary<string, Settings>>(通过设置名称组织),但不幸的是字典不能通过XML序列化。现在我有两个问题:

XML可以序列化和反序列化Object类型的对象(它们只包含像float和bool这样的值类型)吗?

如何在保持xml的可串行化的同时将设置列表分配给键?

1 个答案:

答案 0 :(得分:0)

有一个IXmlSerializable字典。这取自Paul Welter's Weblog - XML Serializable Generic Dictionary

using System;
using System.Collections.Generic;
using System.Text;
using System.Xml.Serialization;

[XmlRoot("dictionary")]
public class SerializableDictionary<TKey, TValue>
    : Dictionary<TKey, TValue>, IXmlSerializable
{
    #region IXmlSerializable Members
    public System.Xml.Schema.XmlSchema GetSchema()
    {
        return null;
    }

    public void ReadXml(System.Xml.XmlReader reader)
    {
        XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
        XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

        bool wasEmpty = reader.IsEmptyElement;
        reader.Read();

        if (wasEmpty)
            return;

        while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
        {
            reader.ReadStartElement("item");

            reader.ReadStartElement("key");
            TKey key = (TKey)keySerializer.Deserialize(reader);
            reader.ReadEndElement();

            reader.ReadStartElement("value");
            TValue value = (TValue)valueSerializer.Deserialize(reader);
            reader.ReadEndElement();

            this.Add(key, value);

            reader.ReadEndElement();
            reader.MoveToContent();
        }
        reader.ReadEndElement();
    }

    public void WriteXml(System.Xml.XmlWriter writer)
    {
        XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
        XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));

        foreach (TKey key in this.Keys)
        {
            writer.WriteStartElement("item");

            writer.WriteStartElement("key");
            keySerializer.Serialize(writer, key);
            writer.WriteEndElement();

            writer.WriteStartElement("value");
            TValue value = this[key];
            valueSerializer.Serialize(writer, value);
            writer.WriteEndElement();

            writer.WriteEndElement();
        }
    }
    #endregion
}

对于第二个问题,您可以使用XmlElement标记告诉Object type属性它接受的可能值:

public class MyClass
{
   [XmlElement("a", Type = typeof(int))]
   [XmlElement("b", Type = typeof(string))]
   [XmlElement("c", Type = typeof(float))]
    public object Value { get; set; }
}

xml会根据类型生成每个值:

<MyClass>
  <b>abc</b>
</MyClass>

<MyClass>
  <a>123</a>
</MyClass>

<MyClass>
  <c>45.7</c>
</MyClass>