XML序列化字典

Question

我想序列化字典集合，但我的代码有错误。我错在哪里？ 这是我的代码。

Dictionary<country,string> Countries=new Dictionary<country,string>(); 

Countries.Add(new country() { code = "AF", iso = 4 }, "Afghanistan"); 
Countries.Add(new country() { code = "AL", iso = 8 }, "Albania"); 
Countries.Add(new country() { code = "DZ", iso = 12 }, "Algeria"); 
Countries.Add(new country() { code = "AD", iso = 20 }, "Andorra"); 

FileStream fs = new FileStream("John1.xml", FileMode.Create); 
XmlSerializer xs = new XmlSerializer(typeof(Dictionary<country, string>)); 
xs.Serialize(fs, Countries); 

类国家

public class country 
{ 
    public string code { get; set; } 
    public int iso { get; set; } 
} 

Answer 1

你可以用DataContractSerializer选项去。它可以序列化.NET字典

How to: Serialize Using DataContractSerializer

Answer 2

的XmlSerializer无法序列一本字典，但你可以改变你的字典中的键值对的列表和序列化：

Dictionary<country,string> Countries=new Dictionary<country,string>(); 

Countries.Add(new country() { code = "AF", iso = 4 }, "Afghanistan"); 
Countries.Add(new country() { code = "AL", iso = 8 }, "Albania"); 
Countries.Add(new country() { code = "DZ", iso = 12 }, "Algeria"); 
Countries.Add(new country() { code = "AD", iso = 20 }, "Andorra"); 

FileStream fs = new FileStream("John1.xml", FileMode.Create); 
XmlSerializer xs = new XmlSerializer(typeof(List<KeyValuePair<country, string>>)); 
xs.Serialize(fs, Countries.Select(x=>new KeyValuePair<country,string>(){ Key = x.Key, Value = x.Value}).ToList()); 

编辑： 另一件事考虑到：您不能使用框架提供的System.Collections.Generic.KeyValuePair结构，因为它不可序列化（Key和Value属性标记为只读）。您必须编写自己的KeyValue结构：

[Serializable] 
public struct KeyValuePair<K, V> 
{ 
    public K Key { get; set; }  
    public V Value { get; set; } 
}