C#中 Dictionary的序列化/反序列化

说明：Dictionary对象本身不支持序列化和反序列化，需要定义一个继承自Dictionary, IXmlSerializable类的自定义类来实现该功能。感觉完全可以把这样的类封装到C#库中，很具有通用性嘛，至今没有遇到不能用的情况的说，或许出于其他方面的考虑microsoft才没有这么做。

2.SerializableDictionary自定义类

[Serializable]  
public class SerializableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, IXmlSerializable  
{  
    public SerializableDictionary() { }  
    public SerializableDictionary(IEqualityComparer<TKey> comparer)
    public void WriteXml(XmlWriter write)       // Serializer  
    {  
        XmlSerializer KeySerializer = new XmlSerializer(typeof(TKey));  
        XmlSerializer ValueSerializer = new XmlSerializer(typeof(TValue));  
  
        foreach (KeyValuePair<TKey, TValue> kv in this)  
        {  
            write.WriteStartElement("SerializableDictionary");  
            write.WriteStartElement("key");  
            KeySerializer.Serialize(write, kv.Key);  
            write.WriteEndElement();  
            write.WriteStartElement("value");  
            ValueSerializer.Serialize(write, kv.Value);  
            write.WriteEndElement();  
            write.WriteEndElement();  
        }  
    }  
    public void ReadXml(XmlReader reader)       // Deserializer  
    {  
        reader.Read();  
        XmlSerializer KeySerializer = new XmlSerializer(typeof(TKey));  
        XmlSerializer ValueSerializer = new XmlSerializer(typeof(TValue));  
  
        if (reader.Name == "SerializableDictionary")
            {
                while (reader.NodeType != XmlNodeType.EndElement)
                {
                    reader.ReadStartElement("SerializableDictionary");
                    reader.ReadStartElement("key");
                    TKey tk = (TKey)KeySerializer.Deserialize(reader);
                    reader.ReadEndElement();
                    reader.ReadStartElement("value");
                    TValue vl = (TValue)ValueSerializer.Deserialize(reader);
                    reader.ReadEndElement();
                    reader.ReadEndElement();
                    this.Add(tk, vl);
                    reader.MoveToContent();
                }
                reader.ReadEndElement();
            }
  
    }  
    public XmlSchema GetSchema()  
    {  
        return null;  
    }  
    XmlSchema IXmlSerializable.GetSchema()
    {
            throw new NotImplementedException();
    }
}  

3.使用

a.定义SerializableDictionary对象，这里以存储键对为例：

SerializableDictionary<string, string> serializableDictionary = new SerializableDictionary<string, string>();  
 

b.添加元素

serializableDictionary.Add("Key1", “Value1”);  

c.序列化

 
using (FileStream fileStream = new FileStream(fileName, FileMode.Create))  
{  
    XmlSerializer xmlFormatter = new XmlSerializer(typeof(SerializableDictionary<string, string>));  
    xmlFormatter.Serialize(fileStream, this.serializableDictionary);  
}  

注：文件名fileName自己定义，如“file.xml”

d.反序列化

 
using (FileStream fileStream = new FileStream(fileName, FileMode.Open))  
{  
    XmlSerializer xmlFormatter = new XmlSerializer(typeof(SerializableDictionary<string, string>));  
    this.serializableDictionary = (SerializableDictionary<string,string>)xmlFormatter.Deserialize(fileStream);  

原文转载自：
https://www.cnblogs.com/1175429393wljblog/p/5269358.html