序列化字典<string，object>包含一个列表<string>？

Question

我发现了一个可序列化的字典，它工作得很好：http://www.jankowskimichal.pl/en/2010/10/serializabledictionary/

但是，当字典中的某个对象只是一个字符串列表时，我收到一个异常。 .NET告诉我它不能序列化它：

Serialize 'C:\bin\Debug\Settings\Default.xml' : System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: There was an error generating the XML document. ---> System.InvalidOperationException: The type System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]] may not be used in this context. 
    at System.Xml.Serialization.XmlSerializationWriter.WriteTypedPrimitive(String name, String ns, Object o, Boolean xsiType) 
    at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterObject.Write1_Object(String n, String ns, Object o, Boolean isNullable, Boolean needType) 
    at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterObject.Write2_anyType(Object o) 
    --- End of inner exception stack trace --- 
    at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) 
    at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o) 
    at ShadowBot.Classes.SerializableDictionary`2.WriteXml(XmlWriter writer) in c:\Classes\SerializableDictionary.cs:line 114 
    at System.Xml.Serialization.XmlSerializationWriter.WriteSerializable(IXmlSerializable serializable, String name, String ns, Boolean isNullable, Boolean wrapped) 
    at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterShadowSettings.Write2_ShadowSettings(String n, String ns, ShadowSettings o, Boolean isNullable, Boolean needType) 
    at Microsoft.Xml.Serialization.GeneratedAssembly.XmlSerializationWriterShadowSettings.Write3_ShadowSettings(Object o) 
    --- End of inner exception stack trace --- 
    at System.Xml.Serialization.XmlSerializer.Serialize(XmlWriter xmlWriter, Object o, XmlSerializerNamespaces namespaces, String encodingStyle, String id) 
    at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o, XmlSerializerNamespaces namespaces) 
    at System.Xml.Serialization.XmlSerializer.Serialize(Stream stream, Object o) 
    at Classes.XmlSerializer.Serialize(String Path, Object Object) in c:\Classes\XmlSerializer.cs:line 29 

这是可能的吗？我想这个功能，只是假设你可以像这样嵌套对象。如果这是不可能的，是否有一种方法可以将字典写入磁盘（不一定是XML），然后重新加载它，而不必为此编写自定义包装器？我最初是一名mac开发人员，这种类型的序列化非常简单，所以也许我错过了.NET上的一些东西。

编辑：当试图odyss'例如我得到：

System.Runtime.Serialization.SerializationException: Type 'System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]' with data contract name 'ArrayOfstring:http://schemas.microsoft.com/2003/10/Serialization/Arrays' is not expected. Consider using a DataContractResolver or add any types not known statically to the list of known types - for example, by using the KnownTypeAttribute attribute or by adding them to the list of known types passed to DataContractSerializer. 

Answer 1

作为替代方案，你可能有更好的运气System.Runtime.Serialization.DataContractSerializer。例如：

Dictionary<string, List<string>> dict = new Dictionary<string, List<string>>(); 
dict.Add("test", new List<string>() { "t", "b" }); 

StringBuilder xmlString = new StringBuilder(); 
using (XmlWriter writer = XmlWriter.Create(xmlString)) 
{ 
    DataContractSerializer serializer = new DataContractSerializer(typeof(Dictionary<string, List<string>>)); 
    serializer.WriteObject(writer, dict); 
} 

这产生：

<?xml version="1.0" encoding="utf-16"?><ArrayOfKeyValueOfstringArrayOfstringty7Ep6D1 xmlns:i="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://schemas.microsoft.com/2003/10/Serialization/Arrays"><KeyValueOfstringArrayOfstringty7Ep6D1><Key>test</Key><Value><string>t</string><string>b</string></Value></KeyValueOfstringArrayOfstringty7Ep6D1></ArrayOfKeyValueOfstringArrayOfstringty7Ep6D1> 

Answer 2

我已经与序列化泛型列表类似的问题。尝试在序列化之前将列表更改为字符串数组，然后在反序列化之后返回List<string>。这很容易做，并可能解决你的问题：

//List<string> to string[] 
string[] sArray = sList.ToArray(); 

//string[] to List<string> 
List<string> sList = sArray.ToList();