c# - 序列化错误 : there was an error reflecting type

Question

我有两个类(class):ServiceTrigger和 ServiceCalendar .

当我序列化 model.Triggers 时我收到一个异常(exception):

Cannot serialize member 'yyy.ServiceTrigger.ServiceDaysOfWeek' of type
'System.Collections.Generic.IEnumerable`1[[yyyy.ServiceCalendar, yyy.ChangeAD, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]',
see inner exception for more details."}

我创建了一个 IEnumerable<ServiceTrigger> :

IEnumerable<ServiceTrigger> serviceTriggers = model.Triggers;
XDocument xDoc = SerializationUtil.Serialize(model.Triggers);

头等舱是这样的:

[DataContract]
public class ServiceTrigger
{   
    [DataMember(Name = "triggerID")]
    public long TriggerID { get; set; }

    [DataMember(Name = "name")]
    public string Name { get; set; }

    [DataMember(Name = "dateStart")]
    public string DateStart { get; set; }

    [DataMember(Name = "code")]
    public string Code { get; set; }

    [DataMember(Name = "isActive")]
    public bool IsActive { get; set; }

    [DataMember(Name = "dateFrom")]
    public string DateFrom { get; set; }

    [DataMember(Name = "dateTo")]
    public string DateTo { get; set; }  

    [DataMember(Name = "currentState")]
    public string CurrentState { get; set; }

    [DataMember(Name = "daysOfWeek")]
    public IEnumerable<ServiceCalendar> ServiceDaysOfWeek { get; set; } 

    [DataMember(Name = "monthsOfYear")]
    public IEnumerable<ServiceCalendar> MonthsOfYear { get; set; }

    [DataMember(Name = "daysOfMonth")]
    public IEnumerable<ServiceCalendar> DaysOfMonth { get; set; } 
}

第二类是这样的:

[DataContract]
public class Calendar
{
    [DataMember(Name = "id")]
    public int Id { get; set; }

    [DataMember(Name = "name")]
    public string Name { get; set; }

    [DataMember(Name = "code")]
    public string Code { get; set; }

    [DataMember(Name = "isActive")]
    public bool IsActive { get; set; }
)

我的序列化类是这样的:

public static class SerializationUtil
{
    public static T Deserialize<T>(XDocument doc)
    {
        XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));

        using (var reader = doc.Root.CreateReader())
        {
            return (T)xmlSerializer.Deserialize(reader);
        }
    }

    public static XDocument Serialize(this object obj)
    {
        XmlSerializer xmlSerializer = new XmlSerializer(obj.GetType());

        XDocument doc = new XDocument();
        using (var writer = doc.CreateWriter())
        {
            xmlSerializer.Serialize(writer, obj);
        }

        return doc;
    }
}

Answer 1

您不能序列化接口(interface)。您需要使用实际对象，例如 List<ServiceCalendar> .

另请注意 ServiceCalendar需要一个默认构造函数不带参数以便XmlSerializer在反序列化时创建它。这仅在您添加带参数的自定义构造函数时才重要。如果您根本没有构造函数，则默认构造函数已经存在。

例子:

public class ServiceCalendar {
    // this is required for deserialization if a .ctor with parameters is present.
    public ServiceCalendar() { }

    public ServiceCalendar(int id) {
        this.id = id;
    }
}

否则你会得到类似

的异常

No parameterless constructor defined for type of ServiceCalendar