c# - C# System.Xml.Serialization 自嵌套元素

Question

我正在尝试反序列化

<graph>
<node>
   <node>
     <node></node>
   </node>
</node>
<node>
   <node>
     <node></node>
   </node>
</node>
</graph>

和

[XmlRoot("graph")]
class graph
{
   List<Node> _children = new List<node>();

   [XmlElement("node")]
   public Node[] node
   {
      get { return _children.ToArray(); }
      set { foreach(Node n in value) children.add(n) }
   };
}

class Node
{
   List<Node> _children = new List<node>();

   [XmlElement("node")]
   public Node[] node
   {
      get { return _children.ToArray(); }
      set { foreach(Node n in value) children.add(n) }
   };
}

但它一直说对象未创建，尝试设置子节点时遇到空引用。上面有什么问题？

先谢谢了~

Answer 1

我无法重现您的错误。我使用了以下代码：

string xml = @"<graph>
<node>
   <node>
     <node></node>
   </node>
</node>
<node>
   <node>
     <node></node>
   </node>
</node>
</graph>";

[XmlRoot("graph")]
public class graph
{
    [XmlElement("node")]
    public Node[] node;
}

public class Node
{
    [XmlElement("node")]
    public Node[] children;
}

XmlSerializer serializer = new XmlSerializer(typeof(graph));

using (MemoryStream stream = new MemoryStream())
using (StreamWriter writer = new StreamWriter(stream))
{
    writer.Write(xml.Replace(Environment.NewLine, String.Empty));
    writer.Flush();
    stream.Position = 0;

    var graph = serializer.Deserialize(stream) as graph;
}

你能发布你用来反序列化的东西吗？

Answer 2

您的问题是在集合处理程序中，如果不为空，请添加：

set { if(value != null) foreach(Node n in value) children.add(n) }