c# - XmlSerializer.Serialize 异常 : "The type [type] was not expected."

Question

我正在尝试序列化这个类:

[XmlRoot("ArrayOfEvent")]
public class EventList
{
    public EventList()
    {

    }

    public EventList(IEnumerable<Event> items)
    {
        Items = items;
    }

    [XmlArray("")]
    public IEnumerable<Event> Items { get; set; }
}

这是 EventList.Items 中包含的 Event 类:

public class Event
{
    [XmlElement]
    public string ID { get; set; }

    [XmlElement]
    public string Title { get; set; }

    [XmlElement]
    public string Description { get; set; }

    [XmlElement]
    public string Location { get; set; }

    [XmlElement]
    public DateTime? StartTime { get; set; }

    [XmlElement]
    public DateTime? EndTime { get; set; }

    [XmlElement]
    public bool? AllDay { get; set; }
}

这里是错误发生的地方:

public static XmlDocument ToXmlDocument<T>(T obj)
{
    var xmlDocument = new XmlDocument();
    var nav = xmlDocument.CreateNavigator();

    if (nav != null)
    {
        using (var writer = nav.AppendChild())
        {
            var ser = new XmlSerializer(typeof(T));
            ser.Serialize(writer, obj); //throws exception
        }
    }

    return xmlDocument;
}

XmlSerializer 在调用 Serialize() 时给我这个错误:

The type Domain.EventList was not expected. 
Use the XmlInclude or SoapInclude attribute to specify types that are not 
known statically.

我已经尝试在 EventList 类和 Event 类上使用 [XmlInclude(typeof(EventList))] 但都没有这些想法的工作。我不确定还能做什么。

有人熟悉这个问题吗？我该如何解决？提前致谢。

Answer 1

基本上，列表对于 XmlSerializer 来说有点特殊。如果您将 DTO 声明为具有具体列表类型，您将获得更多成功，例如:

[XmlArray("")]
public List<Event> Items { get; set; }