1     /// <summary>
 2     /// Dictionary(支持 XML 序列化)
 3     /// </summary>
 4     /// <typeparam name="TKey">键类型</typeparam>
 5     /// <typeparam name="TValue">值类型</typeparam>
 6     [XmlRoot("XmlDictionary")]
 7     [Serializable]
 8     public class XmlDictionary<TKey, TValue> : Dictionary<TKey, TValue>, IXmlSerializable
 9     {
10         #region 构造函数
11         public XmlDictionary()
12         { }
13 
14         public XmlDictionary(IDictionary<TKey, TValue> dictionary) : base(dictionary)
15         { }
16 
17         public XmlDictionary(IEqualityComparer<TKey> comparer) : base(comparer)
18         { }
19 
20         public XmlDictionary(int capacity) : base(capacity)
21         { }
22 
23         public XmlDictionary(int capacity, IEqualityComparer<TKey> comparer) : base(capacity, comparer)
24         { }
25 
26         protected XmlDictionary(SerializationInfo info, StreamingContext context) : base(info, context)
27         { }
28         #endregion 构造函数
29 
30         #region IXmlSerializable Members
31         public XmlSchema GetSchema() => null;
32 
33         /// <summary>
34         ///     从对象的 XML 表示形式生成该对象(反序列化)
35         /// </summary>
36         /// <param name="xr"></param>
37         public void ReadXml(XmlReader xr)
38         {
39             if (xr.IsEmptyElement)
40                 return;
41             var ks = new XmlSerializer(typeof(TKey));
42             var vs = new XmlSerializer(typeof(TValue));
43             xr.Read();
44             while (xr.NodeType != XmlNodeType.EndElement)
45             {
46                 xr.ReadStartElement("Item");
47                 xr.ReadStartElement("Key");
48                 var key = (TKey)ks.Deserialize(xr);
49                 xr.ReadEndElement();
50                 xr.ReadStartElement("Value");
51                 var value = (TValue)vs.Deserialize(xr);
52                 xr.ReadEndElement();
53                 Add(key, value);
54                 xr.ReadEndElement();
55                 xr.MoveToContent();
56             }
57             xr.ReadEndElement();
58         }
59 
60         /// <summary>
61         ///     将对象转换为其 XML 表示形式(序列化)
62         /// </summary>
63         /// <param name="xw"></param>
64         public void WriteXml(XmlWriter xw)
65         {
66             var ks = new XmlSerializer(typeof(TKey));
67             var vs = new XmlSerializer(typeof(TValue));
68             foreach (var key in Keys)
69             {
70                 xw.WriteStartElement("Item");
71                 xw.WriteStartElement("Key");
72                 ks.Serialize(xw, key);
73                 xw.WriteEndElement();
74                 xw.WriteStartElement("Value");
75                 vs.Serialize(xw, this[key]);
76                 xw.WriteEndElement();
77                 xw.WriteEndElement();
78             }
79         }
80         #endregion IXmlSerializable Members
81     }