不将XML元素列为数组

Question

我在根节点上列出Snapshots数组时遇到问题。这是代码：

[XmlRoot(ElementName = "WebService", DataType = "WebService", IsNullable = false)]
public class WebServiceXmlElement
{
    [XmlArray("Snapshots"), XmlArrayItem(ElementName = "Snapshot", Namespace = XmlNamespaceSettings.DefaultNamespace, IsNullable = true)]
    public NodeSnapshotElement[] Snapshots { get; set; }
}

public class NodeSnapshotElement
{ 

}

[XmlType(TypeName = "CrateSnapshot", Namespace = XmlNamespaceSettings.DefaultNamespace, IncludeInSchema = false)]
public class NodeCreateSnapshot : NodeSnapshotElement
{
    [XmlAttribute(AttributeName = "ID", Namespace = XmlNamespaceSettings.DefaultNamespace)]
    public string ID { get; set; }
}

以下是生成的XML：

<WebService xsd:schemaLocation="...">
  <Snapshots/>
</WebService>

应该是：

<WebService xsd:schemaLocation="...">
  <xsd:Snapshots>
    <xsd:Snapshot>...</xsd:Snapshot>
    <xsd:Snapshot>...</xsd:Snapshot>
  </xsd:Snapshots>
</WebService>

Answer 1

您的快照数组必须为空。否则，实际上会生成元素。

一个注意事项 - 您需要为NodeCreateSnapshot类添加XmlInclude声明，否则会出现运行时异常。您可以这样添加：

[XmlRoot(ElementName = "WebService", DataType = "WebService", IsNullable = false)]
[XmlInclude(typeof(NodeCreateSnapshot))]
public class WebServiceXmlElement
{
    // ...
}