如何以“一对多”关系序列化两个对象？

Question

我有两个类： Lookup和LookupItem ， Lookup具有一个名为Items的成员，该成员是LookupItem的集合。 我无法序列化Lookup或LookupItem 。 对于第一个错误The type LookupItem was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically.我没有看到The type LookupItem was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically. The type LookupItem was not expected. Use the XmlInclude or SoapInclude attribute to specify types that are not known statically. 第二个错误A circular reference was detected while serializing an object of type Lookup. 。

我怎么解决这个问题？

我使用以下代码进行序列化：

public static string Serialize(object obj)
{
    XmlSerializer ser = new XmlSerializer(obj.GetType());
    StringBuilder sb = new StringBuilder();
    StringWriter writer = new StringWriter(sb);
    ser.Serialize(writer, obj);
    return sb.ToString();
}

更新：类的框架：

[ActiveRecord（Lazy = true）]公共类查找：ActiveRecordExtender，IComparable {public Lookup（）{}

[Property]
public virtual string Title { set; get; } 

// creating relation
[HasMany(typeof(LookupItem), Cascade = ManyRelationCascadeEnum.All)]
public virtual IList Items { set; get; }

}

[ActiveRecord（Lazy = true）]公共类LookupItem：ActiveRecordExtender {公共LookupItem（）{}

//creating relation
[BelongsTo("Lookup_ID")]
public virtual Lookup ContainerLookup { set; get; }

[Property]
public virtual string Title { set; get; } 

[Property]
public virtual string Value { set; get; } 

[Property]
public virtual int SortOrder { set; get; }

}

请注意，我将Catle ActiveRecord用作我的ORM，请注意，此问题与从ActiveRecordBase继承无关。 因为此域中没有关系的其他类正常工作。

Answer 1

我假设您要序列化嵌套类。

看看类似的帖子C＃System.Xml.Serialization自嵌套元素

http://www.codeproject.com/KB/XML/Serializing_Nested_XML.aspx

Answer 2

根据博客文章，其意见在这里 ，如果假定没有必要有关数据显示，添加[XmlIgnore]解决了这个问题。