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序列化数组时如何使用xmlAttributeOverrides?

xml-serialization .net c#

char m · 技术社区 · 15 年前

我有一个名为“updatedcomponents”的数组,它是属于类networkcomponent的对象。我必须以更改根元素(=array)的名称和命名空间以及将单个networkcomponent项的名称更改为component的方式对其进行序列化。我下面有一个导致异常的代码:

System.InvalidOperationException:反射类型“ComponentSyncService.NetworkComponent[]”时出错。--->system.invalidOperationException:不能为类型componentSyncService.networkcomponent[]指定xmlRoot和xmlType属性。

代码:

XmlAttributeOverrides xaos = new XmlAttributeOverrides();

// the array itself aka the root. change name and namespace
XmlElementAttribute xea = new XmlElementAttribute(_updatedComponents.GetType());
xea.Namespace = "http://www.example.com/nis/componentsync";
xea.ElementName = "components";

XmlAttributes xas = new XmlAttributes();
xas.XmlElements.Add(xea);
xaos.Add(_updatedComponents.GetType(), xas); 

// then the items of the array. just change the name
xea = new XmlElementAttribute(typeof(networkcomponent));
xea.ElementName = "component";

xas = new XmlAttributes();
xas.XmlElements.Add(xea);
xaos.Add(typeof(NetworkComponent), "NetworkComponent", xas);

XmlSerializer serializer = new XmlSerializer(_updatedComponents.GetType(), xaos);

XmlTextWriter writer = new XmlTextWriter(string.Format("{0}\\ComponentSyncWS_{1}.xml", 
                      Preferences.FileSyncDirectory, requestId), Encoding.UTF8);
serializer.Serialize(writer, _updatedComponents);

1 回复 | 直到 8 年前

Kenster marc_s 8 年前

是什么 _updatedComponents 是吗?我猜这是 NetworkComponent[]

public class ComponentsMessage {
    public NetworkComponent[] Components {get;set;}
}

NetworkComponent ComponentsMessage

[XmlRoot("components", Namespace = XmlNamespace)]
[XmlType("components", Namespace = XmlNamespace)]
public class ComponentsMessage
{
    public const string XmlNamespace = "http://www.example.com/nis/componentsync";
    [XmlElement("component")]
    public NetworkComponent[] Components { get; set; }
}

public class ComponentsMessage
{
    public NetworkComponent[] Components { get; set; }
}
class Program
{
    static void Main()
    {
        NetworkComponent[] _updatedComponents = new NetworkComponent[2] {
            new NetworkComponent{},new NetworkComponent{}
        };
        const string XmlNamespace = "http://www.example.com/nis/componentsync";
        XmlAttributeOverrides ao = new XmlAttributeOverrides();
        ao.Add(typeof(ComponentsMessage), new XmlAttributes {
            XmlRoot = new XmlRootAttribute("components") { Namespace = XmlNamespace },
            XmlType = new XmlTypeAttribute("components") { Namespace = XmlNamespace }
        });
        ao.Add(typeof(ComponentsMessage), "Components", new XmlAttributes {
            XmlElements =  {
                new XmlElementAttribute("component")
            }
        });
        ComponentsMessage msg = new ComponentsMessage { Components = _updatedComponents };
        XmlSerializer serializer = new XmlSerializer(msg.GetType(), ao);
        serializer.Serialize(Console.Out, msg);
    }
}