从 POST 请求中使用嵌套的 JSON，无法将嵌套的 JSON 分配给我的类

Question

I have a WebAPI project that recieves a JSON string, which should initiate a new object and fill its values. My classes look like this:

    public class User
{
    public string email { get; set; }
    public string libraryId { get; set; }
    public string name { get; set; }
    public DateTime joiningDate { get; set; }
    public string zone { get; set; }
    public List<Rental> rental { get; set; }
}

    public class Rental
{
    public Dictionary<DateTime, int> rental;
}

and the JSON object I'm recieving is something like this:

{
    "email": "a@b.ca",
    "libraryId": "314159",
    "name": "Jon Doe",
    "joiningDate": "12/31/9999 11:59:59 PM",
    "zone": "13",
    "Rental": 
        [
            {"12/31/1999 11:59:59 PM": 12}, 
            {"12/30/2999 11:59:59 PM": 13}
        ]
}

Now, to validate that the object is correctly populated, I send the object back in the response

    public HttpResponseMessage Post([FromBody]JObject incoming)
    {
        string toString = JsonConvert.SerializeObject(incoming);                
        User request = JsonConvert.DeserializeObject<User>(toString);     

        return Request.CreateResponse(HttpStatusCode.OK, request);
    }

The nested JSON comes always looking like this:

    "Rental": [
    {
        "Rental": null
    },
    {
        "Rental": null
    }
]

My question is: how should I build the Rental class so that I can properly populate it with the input from my JSON string? I tried to keep the Dictionary of rentals in the User class itself instead of its own class, but it returned an error.

Answer 1

The Rental class should look like:

public class Rental
{
    public KeyValuePair<DateTime, int> rental;
}

Since each entry in the array is a KeyValuePair<DateTime, int> and not a Dictionary<DateTime, int> .

A different approach would be to change the json's structure to:

{
    "email": "a@b.ca",
    "libraryId": "314159",
    "name": "Jon Doe",
    "joiningDate": "12/31/9999 11:59:59 PM",
    "zone": "13",
    "Rentals": 
     {
         "12/31/1999 11:59:59 PM": 12, 
         "12/30/2999 11:59:59 PM": 13
     }
}

And the class to:

public class User
{
    public string email { get; set; }
    public string libraryId { get; set; }
    public string name { get; set; }
    public DateTime joiningDate { get; set; }
    public string zone { get; set; }
    public Dictionary<DateTime, int> rentals {get;set;}
}