C#使用dynamic类型访问JObject对象

public class JObjectAccessor : DynamicObject
{
  JToken obj;

  public JObjectAccessor(JToken obj)
  {
    this.obj = obj;
  }

  public override bool TryGetMember(GetMemberBinder binder, out object result)
  {
    result = null;
      
    if (obj == null) return false;

    var val = obj[binder.Name];

    if (val == null) return false;

    result = Populate(val);

    return true;
  }


  private object Populate(JToken token)
  {
    var jval = token as JValue;
    if (jval != null)
    {
      return jval.Value;
    }
    else if (token.Type == JTokenType.Array)
    {
      var objectAccessors = new List<object>();
      foreach (var item in token as JArray)
      {
        objectAccessors.Add(Populate(item));
      }
      return objectAccessors;
    }
    else
    {
      return new JObjectAccessor(token);
    }
  }
}

string json = @"{'name': 'Jeremy Dorn','location': {'city': 'San Francisco','state': 'CA'},'pets': [{'type': 'dog','name': 'Walter'}]}";

JObject jobj = JObject.Parse(json);

dynamic obj = new JObjectAccessor(jobj);

Console.WriteLine($"{obj.name}: {obj.location.city} {obj.location.state}");
Console.WriteLine($"{obj.pets[0].type}: {obj.pets[0].name}");