我希望将List<Item>
项目集合()序列化为JSON。
这些项目具有一个集合,Connection
该集合提供有关从一个Item
到另一个的连接的信息Item
。并且由于连接对象具有对项目的引用,因此使其成为无限循环。
我的问题是,当我第二次序列化对象时,是否有一种方法可以跳过连接集合的序列化。
我已经尝试了诸如继承JsonConverter
和编写自定义WriteJson()
方法之类的事情,但是从那里我不知道是否应该写出数组。
我也尝试过使用自定义的ContractResolver,但效果不佳。
班级
public class Item
{
private static int _lastID = 0;
public Item()
{
ID = ++_lastID;
Connections = new List<Connection>();
}
public int ID { get; set; }
public string Name { get; set; }
public string Prop1 { get; set; }
public string Prop2 { get; set; }
public List<Connection> Connections { get; set; }
}
public class Connection
{
private Connection(ConnectionType type, Item source, Item target)
{
if (type == ConnectionType.None)
throw new ArgumentException();
if (source == null)
throw new ArgumentNullException("source");
if (target == null)
throw new ArgumentNullException("target");
Type = type;
Source = source;
Target = target;
}
public ConnectionType Type { get; set; }
public Item Source { get; set; }
public Item Target { get; set; }
public static void Connect(ConnectionType type, Item source, Item target)
{
var conn = new Connection(type, source, target);
source.Connections.Add(conn);
target.Connections.Add(conn);
}
}
想要的结果:
[
{
"id": 1,
"name": "Item #1",
"prop1": "val1",
"prop2": "val2",
"connections": {
"type": "ConnType",
"source": {
"id": 1,
"name": "Item #1",
"prop1": "val1",
"prop2": "val2"
// no connections array
},
"target": {
"id": 2,
"name": "Item #2",
"prop1": "val1",
"prop2": "val2"
// no connections array
}
}
},
{
"id": 2,
"name": "Item #2",
"prop1": "val1",
"prop2": "val2",
"connections": {
"type": "ConnType",
"source": {
"id": 1,
"name": "Item #1",
"prop1": "val1",
"prop2": "val2"
// no connections array
},
"target": {
"id": 2,
"name": "Item #2",
"prop1": "val1",
"prop2": "val2"
// no connections array
}
}
}
]
编辑:
C#
var settings = new JsonSerializerSettings
{
ContractResolver = new CamelCasePropertyNamesContractResolver(),
ReferenceLoopHandling = ReferenceLoopHandling.Ignore,
Formatting = Formatting.Indented
};
settings.Converters.Add(new StringEnumConverter());
var json = JsonConvert.SerializeObject(collection, settings);
而不是声明的类型的Source
和Target
作为Item
,你可能会推出一个新的类,比如说ItemClass
,which'll包含类的所有领域Item
,除Connections
财产。
public class ItemClass
{
public int ID { get; set; }
public string Name { get; set; }
public string Prop1 { get; set; }
public string Prop2 { get; set; }
}
public class Connection
{
// ...
public ConnectionType Type { get; set; }
public ItemClass Source { get; set; }
public ItemClass Target { get; set; }
// ...
}
现在,您将产生相应的填充新ItemClass
类型实例的开销。
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