反序列化XML和多個命名空間的對象

Question

我正嘗試反序列化這個XML對象在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> 

代碼：

我可不是得到任何 「項目」 列表。該對象不是反序列化的。

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

類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>(); 
}  

類：

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

你有幾個問題：

1. 你定義一個XmlArrayItem屬性 - 卜實際上，在您的XML中，您沒有任何項目列表。如果你想使用XML數組結構，你需要有這樣的事情爲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>包裝。

2. 你有這樣的聲明：

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

   但如果是ServiceListtypeService界定？我沒有看到它的任何痕跡....

我簡化你的代碼位 - 這工作得很好：現在

[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，當我運行您的代碼進行反序列化你的XML，我確實得到了很好的對象。