.net 2.0 泛型Dictionary不支持 XML serializable. 下面是一个实现IXmlSerializable 接口实现支持Serialize的泛型集合.Dictionary 。 Dictionary<TKey, TValue>本身实现了ISerializable接口，WebService中无法实现序列化，具体是什么原因它不支持XML序列化。
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/**//// <summary>
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/// 支持XML序列化的泛型 Dictionary
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/// </summary>
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/// <typeparam name="TKey"></typeparam>
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/// <typeparam name="TValue"></typeparam>
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[XmlRoot("dictionary")]
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public class SerializableDictionary<TKey, TValue>
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: Dictionary<TKey, TValue>, IXmlSerializable
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{
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#region 构造函数
public SerializableDictionary():base()
{ }
public SerializableDictionary(IDictionary<TKey, TValue> dictionary):base(dictionary)
{ }
public SerializableDictionary(IEqualityComparer<TKey> comparer):base(comparer)
{
}
public SerializableDictionary(int capacity):base(capacity)
{ }
public SerializableDictionary(int capacity, IEqualityComparer<TKey> comparer)
:base(capacity,comparer)
{ }
protected SerializableDictionary(SerializationInfo info, StreamingContext context):base(info,context)
{ }
#endregion
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IXmlSerializable Members#region IXmlSerializable Members
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public System.Xml.Schema.XmlSchema GetSchema()
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{
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return null;
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}
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/**//// <summary>
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/// 从对象的 XML 表示形式生成该对象
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/// </summary>
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/// <param name="reader"></param>
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public void ReadXml(System.Xml.XmlReader reader)
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{
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XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
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XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
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bool wasEmpty = reader.IsEmptyElement;
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reader.Read();
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if (wasEmpty)
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return;
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while (reader.NodeType != System.Xml.XmlNodeType.EndElement)
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{
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reader.ReadStartElement("item");
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reader.ReadStartElement("key");
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TKey key = (TKey)keySerializer.Deserialize(reader);
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reader.ReadEndElement();
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reader.ReadStartElement("value");
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TValue value = (TValue)valueSerializer.Deserialize(reader);
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reader.ReadEndElement();
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this.Add(key, value);
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reader.ReadEndElement();
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reader.MoveToContent();
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}
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reader.ReadEndElement();
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}
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/**//// <summary>
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/// 将对象转换为其 XML 表示形式
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/// </summary>
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/// <param name="writer"></param>
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public void WriteXml(System.Xml.XmlWriter writer)
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{
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XmlSerializer keySerializer = new XmlSerializer(typeof(TKey));
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XmlSerializer valueSerializer = new XmlSerializer(typeof(TValue));
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foreach (TKey key in this.Keys)
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{
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writer.WriteStartElement("item");
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writer.WriteStartElement("key");
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keySerializer.Serialize(writer, key);
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writer.WriteEndElement();
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writer.WriteStartElement("value");
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TValue value = this[key];
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valueSerializer.Serialize(writer, value);
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writer.WriteEndElement();
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writer.WriteEndElement();
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}
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}
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#endregion
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}
