将XML反序列化为对象时缺少子节点

Question

我需要处理某些xml,无法从中反序列化对象列表.以下是xml:

<catalog>
<item>
    <id>18338517</id>
    <note label="Name ">Gear xyz</note>
    <note label="Size ">10</note>       
    <note label="Source">Store xyz</note>
    <relation weight="100">
        <type>External</type>
        <id>123</id>
        <name>Mcday</name>          
    </relation>
    <relation weight="99">
        <type>Internal</type>
        <id>234</id>
        <name>Mcnight</name>
    </relation>
</item>
    <item> ..... </item></catalog>

以下是我的课

[XmlRoot("catalog")]
public class Catalog
{
    [XmlArray("item")]
    [XmlArrayItem("item", typeof(Item))]
    public Item[] item{ get; set; }
}

[XmlRoot("item")]
public class Item
{
    [XmlElement("id")]
    public string id { get; set; }

    [XmlArrayItem("note", typeof(Note))]
    public Note[] note { get; set; }

    [XmlArrayItem("relation", typeof(Relation))]
    public Relation[] relation { get; set; }
}

[Serializable]
public class Note
{
    [XmlAttribute("label")]
    public string label { get; set; }

    [XmlText]
    public string Value { get; set; }
}

[Serializable]
public class Relation
{
    [XmlAttribute("weight")]
    public string weight { get; set; }

    [XmlText]
    public string Value { get; set; }

    [XmlElement("id")]
    public string id { get; set; }

    [XmlElement("type")]
    public string type { get; set; }

    [XmlElement("name")]
    public string name { get; set; }
}

最后,要求反序列化

Catalog catalog = null;
XmlSerializer mySerializer = new XmlSerializer(typeof(Catalog));
using (TextReader reader = new StreamReader(@"D:\TEMP\deserialize xml\catalog.xml"))
{
    catalog = (Catalog)mySerializer.Deserialize(reader);
}

它不会返回任何错误,只是目录对象中的空项.

Answer 1

要使用XmlArray和XmlArrayItem属性,就像在这里一样:

[XmlArray("term")]
[XmlArrayItem("term", typeof(Item))]
public Item[] item{ get; set; }

您的XML必须实际提供正确的集合元素.所以你的课应该是这样的

[XmlRoot("catalog")]
public class Catalog
{
    [XmlArray("items")] // note that I corrected 'term' to 'items'/'item'
    [XmlArrayItem("item", typeof(Item))]
    public Item[] item{ get; set; }
}

你的XML应该是这样的

<catalog>
  <items>
    <item>
      <id>18338517</id>
       ...

请注意,<items>这相当于元素[XmlArray("items")],和孩子们元素<item>对应[XmlArrayItem("item", typeof(Item))].

如果您不想/不能更改XML格式,请使用该XmlElement属性而不是XmlArrayItem属性.所以你的最终代码应如下所示:

[XmlRoot("catalog")]
public class Catalog
{
     [XmlElement("item")] // no XmlArray/XmlArrayItem, just XmlElement
     public Item[] Items { get; set; }
}

[XmlType("item")]
public class Item
{
    [XmlElement("id")]
    public string id { get; set; }

    [XmlElement("note", typeof(Note))] // no XmlArray/XmlArrayItem, just XmlElement
    public Note[] note { get; set; }

    [XmlElement("relation", typeof(Relation))] // no XmlArray/XmlArrayItem, just XmlElement
    public Relation[] relation { get; set; }
}

[Serializable]
public class Note
{
    [XmlAttribute("label")]
    public string label { get; set; }

    [XmlText]
    public string Value { get; set; }
}

[Serializable]
public class Relation
{
    [XmlAttribute("weight")]
    public string weight { get; set; }

    [XmlText]
    public string Value { get; set; }

    [XmlElement("id")]
    public string id { get; set; }

    [XmlElement("type")]
    public string type { get; set; }

    [XmlElement("name")]
    public string name { get; set; }
}