我正在写将主要用于过滤从人口人一般的过滤器类。 我试图序列化过滤器类，但在运行时我得到一个SerializationException：
System.Runtime.Serialization.SerializationException : Type 'System.DelegateSerializationHolder+DelegateEntry' with data contract name 'DelegateSerializationHolder.DelegateEntry:http://schemas.datacontract.org/2004/07/System' 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.
我的过滤器类如下所示：
[DataContract(Name = "Filter", Namespace = "")]
public class Filter<T>
{
/// <summary>
/// Default constructor, needed by serializers.
/// </summary>
public Filter()
{
Name = "New filter";
Predicates = new List<Predicate<T>>();
}
/// <summary>
/// ctor. Takes a list of predicates for type T
/// to filter with.
/// </summary>
public Filter(string name, IEnumerable<Predicate<T>> predicates)
{
Name = name;
Predicates = predicates.ToList();
}
/// <summary>
/// Name of the filter.
/// </summary>
[DataMember(Order = 0)]
public string Name
{
get;
set;
}
[DataMember(Order = 1)]
public List<Predicate<T>> Predicates
{
get;
set;
}
/// <summary>
/// Filters sequence of type T.
/// </summary>
public IEnumerable<T> ApplyFilter(IEnumerable<T> input)
{
var result = new List<T>(input);
return Predicates.Aggregate(result, (current, predicate) => current.FindAll(predicate));
}
}
当序列化过滤器类，我得到上面的例外。 如果我不标记谓词作为数据成员，那么它的工作原理。 但很明显，我想序列化属性也是如此。
我已经在这了几个小时了，我不能弄明白。 任何帮助将非常感激！
