我们可以在使用 ASP.NET WEB API 返回客户端之前解析 JSON 数据吗

Question

我希望我的 Json 数据如下所示：

 {"Person": {
    "PersonId": "1"
    "Name":"Brad",
    "Age":"45",
   ...
  }

其中“Person”是返回的对象类型。

当我看到 XML 格式时，它总是返回指定对象类型的数据

<Person>
     <PersonId>1</PersonId>
     <Name>Brad</Name>
     <Age>45</Age>
</Person>
 Where Person is type of Object.

那么我们有什么方法可以得到上述格式中指定的 Json 数据吗？

Answer 1

可能是：

public class Person
{
    public int PersonId { get; set; }
    public string Name { get; set; }
    public int Age { get; set; }
}

public class PersonController : ApiController
{
    /*{"ArrayOfPerson":[{"PersonId":1,"Name":"Brad","Age":45},{"PersonId":2,"Name":"Mary","Age":30}]}*/
    [HttpGet]
    public HttpResponseMessage Get()
    {
        Person person1 = new Person { PersonId = 1, Name = "Brad", Age = 45 };
        Person person2 = new Person { PersonId = 2, Name = "Mary", Age = 30 };

        IEnumerable<Person> data = new List<Person> { person1, person2 };
        JToken json = MyHelper.ToJson(data);
        return Request.CreateResponse<JToken>(json);
    }

    //{"Person":{"PersonId":1,"Name":"Brad1","Age":45}} 
    [HttpGet]
    public HttpResponseMessage Get(int id)
    {
        Person data = new Person { PersonId = id, Name = string.Concat("Brad", id), Age = 45 };
        JToken json = MyHelper.ToJson<Person>(data);
        return Request.CreateResponse<JToken>(json);
    }
}


public static class MyHelper
{
    public static JToken ToJson<T>(T source)
    {
        JObject result = new JObject();

        Type type = typeof(T);
        string key = type.Name;
        if (typeof(IEnumerable).IsAssignableFrom(type))
            key = string.Format("ArrayOf{0}", GetEnumeratedType(type).Name);

        JToken value = (source != null) ? JToken.FromObject(source) : JValue.CreateNull();//Newtonsoft.Json 6.0.6
        result.Add(key, value);
        return result;
    }

    /// <summary>
    /// Use http://stackoverflow.com/questions/4129831/how-do-i-get-the-array-item-type-from-array-type-in-net
    /// </summary>
    /// <param name="type"></param>
    /// <returns></returns>
    public static Type GetEnumeratedType(Type type)
    {
        // provided by Array
        var elType = type.GetElementType();
        if (null != elType) return elType;

        // otherwise provided by collection
        var elTypes = type.GetGenericArguments();
        if (elTypes.Length > 0) return elTypes[0];

        // otherwise is not an 'enumerated' type
        return null;
    }
}