C# serialization datacontract datacontractserializer

IList的数据协定序列化

发布于 2024-12-06 09:56:04 字数 1056 浏览 1 评论 0原文

我有以下代码，其中我尝试将列表序列化到文件

public static void Serialize<T>(this IList<T> list, string fileName)  
{
   try
   {
      var ds = new DataContractSerializer(typeof(T));
      using (Stream s = File.Create(fileName))
          ds.WriteObject(s, list);  
   }
   catch (Exception e)
   {
      _logger.Error(e);
      throw;
   } 
}

，但出现异常：

输入“System.Collections.Generic.List`1[[MyClass, MyNameSpace，版本=1.0.0.0，文化=中性， PublicKeyToken=null]]' 带有数据合约名称 'ArrayOf*MyClass*:http://schemas.datacontract.org/2004/07/MyNameSpace' 预计不会。考虑使用 DataContractResolver 或添加任何已知类型列表中静态未知的类型 - 例如，通过使用 KnownTypeAttribute 属性或将它们添加到传递给 DataContractSerializer 的已知类型列表。

[KnownType(typeof(MyClass))]
[DataContract]
public class MyClass
{
    #region Properties
    [DataMember]
    public string Foo{ set; get; }
    [DataMember]
    public string Bar{ set; get; }
}

有什么想法吗？

没有继承权。

原文

I have the following code in which I'm trying to serialize a list to a file

public static void Serialize<T>(this IList<T> list, string fileName)  
{
   try
   {
      var ds = new DataContractSerializer(typeof(T));
      using (Stream s = File.Create(fileName))
          ds.WriteObject(s, list);  
   }
   catch (Exception e)
   {
      _logger.Error(e);
      throw;
   } 
}

and I'm getting the exception:

Type 'System.Collections.Generic.List`1[[MyClass,
MyNameSpace, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null]]' with data contract name
'ArrayOf*MyClass*:http://schemas.datacontract.org/2004/07/MyNameSpace'
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.

[KnownType(typeof(MyClass))]
[DataContract]
public class MyClass
{
    #region Properties
    [DataMember]
    public string Foo{ set; get; }
    [DataMember]
    public string Bar{ set; get; }
}

Any ideas?

There is no inheritance.

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梦罢 2024-12-13 09:56:04

发生的情况是序列化器需要 T 的实例，而不是 T 的列表，因此您希望您的方法如下所示：

public static void Serialize<T>(this IList<T> list, string fileName)  
{
   try
   {
      var ds = new DataContractSerializer(list.GetType());
      using (Stream s = File.Create(fileName))
        ds.WriteObject(s, list);  
   }
   catch (Exception e)
   {
     _logger.Error(e);
     throw;
   } 
}

What has happened is that the serializer is expecting an instance of T, not a list of T, so you want your method to be like so:

public static void Serialize<T>(this IList<T> list, string fileName)  
{
   try
   {
      var ds = new DataContractSerializer(list.GetType());
      using (Stream s = File.Create(fileName))
        ds.WriteObject(s, list);  
   }
   catch (Exception e)
   {
     _logger.Error(e);
     throw;
   } 
}

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