反序列化XML和多个命名空间的对象

Question

我正尝试反序列化这个XML对象在C＃.NET 4.5：

<DIDL-Lite xmlns:dc="http://purl.org/dc/elements/1.1/" 
     xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/" 
     xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/"> 
    <item id="28" parentID="19" restricted="1"> 
     <dc:creator>Alicia Keys</dc:creator> 
     <dc:date>2003-01-01</dc:date> 
     <dc:title>Gangsta Lovin&apos; (feat. Alicia Keys)</dc:title> 
    </item> 
</DIDL-Lite> 

代码：

我可不是得到任何 “项目” 列表。该对象不是反序列化的。

MemoryStream reader = new MemmoryStream(System.Text.Encoding.Unicode.GetBytes(Result)); 
var ser = new XmlSerializer(typeof(DIDLLite)); 
DIDLLite device = (DIDLLite)ser.Deserialize(reader); 

类DIDLLite：ContainerItem

[XmlRoot("DIDL-Lite", Namespace = "urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/")] 
public class DIDLLite { 
    DIDLLite() { 
     this.serviceItem = new List<ContainerItem>(); 
    } 

    [System.Xml.Serialization.XmlArrayItem("item", typeof(ServiceListTypeService), IsNullable = false)] 
    List<ContainerItem> serviceItem = new List<ContainerItem>(); 
}  

类：

public class ContainerItem 
{ 
    [System.Xml.Serialization.XmlAttribute("id")] 
    public string id { get; set; } 

    [System.Xml.Serialization.XmlAttribute("parentID")] 
    public string parentID { get; set; } 

    [System.Xml.Serialization.XmlAttribute("restricted")] 
    public string restricted { get; set; } 

    [System.Xml.Serialization.XmlAttribute("searchable")] 
    public string searchable { get; set; } 

    public string title { get; set; } 
} 

Answer 1

你有几个问题：

1. 你定义一个XmlArrayItem属性 - 卜实际上，在您的XML中，您没有任何项目列表。如果你想使用XML数组结构，你需要有这样的事情为XML：

   <DIDL-Lite .....> 
       <Items> 
        <item id="28" parentID="19" restricted="1"> 
        ...... 
        </item> 
        <item id="29" parentID="19" restricted="1"> 
        ...... 
        </item> 
       </Items> 
   </DIDL-Lite> 
   

   所以，你需要有在你<item>元素的<Items>...</Items>包装。

2. 你有这样的声明：

   [XmlArrayItem("item", typeof(ServiceListTypeService), IsNullable = false)] 
   

   但如果是ServiceListtypeService界定？我没有看到它的任何痕迹....

我简化你的代码位 - 这工作得很好：现在

[XmlRoot("DIDL-Lite", Namespace = "urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/")] 
public class DIDLLite 
{ 
    [XmlElement("item")] 
    public ContainerItem Item { get; set; } 
} 


public class ContainerItem 
{ 
    [XmlAttribute("id")] 
    public string id { get; set; } 

    [XmlAttribute("parentID")] 
    public string parentID { get; set; } 

    [XmlAttribute("restricted")] 
    public string restricted { get; set; } 

    [XmlAttribute("searchable")] 
    public string searchable { get; set; } 

    // you were missing these elements and their namespace 

    [XmlElement(Namespace = "http://purl.org/dc/elements/1.1/")] 
    public string creator { get; set; } 
    [XmlElement(Namespace = "http://purl.org/dc/elements/1.1/")] 
    public string date { get; set; } 
    [XmlElement(Namespace = "http://purl.org/dc/elements/1.1/")] 
    public string title { get; set; } 
} 

而且，当我运行您的代码进行反序列化你的XML，我确实得到了很好的对象。