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>

以下是我的班级

[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

使用XmlArray和XmlArrayItem属性，就像您在此处一样：

[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。所以你的课应该看起来像

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

，您的XML应该看起来像

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

请注意与<items>对应的[XmlArray("items")]元素，以及与<item>对应的子元素[XmlArrayItem("item", typeof(Item))]。

如果您不想/不能更改XML格式，请使用XmlElement属性而不是XmlArrayItem属性。所以你的最终代码应该是这样的：

[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; }
}

Answer 2

您的属性错误：

public class Catalog
{
    [XmlArray("term")]
    [XmlArrayItem("term", typeof(Item))]

请改为尝试：

public class Catalog
{
    [XmlArray("items")]
    [XmlArrayItem("item", typeof(Item))]

编辑：为了进一步开发项目，您应该考虑使用XSD.exe创建XML架构和生成代码，请参阅此问题：{ {3}}

EDIT2 ：查看MSDN，XmlArrayAttribute构造函数定义为：

public XmlArrayAttribute(
    string elementName
)

参数记录为：

的ElementName 键入：System.String
The name of the XML element that the XmlSerializer generates.

将XML反序列化为对象时缺少子节点

2 个答案: