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c#jsonjson.netdeserialization
Marnie Rodriguez
Marnie Rodriguez

Reputation: 441

Newtonsoft JSON is not deserializing the nested object in my json file

I have a JSON file that I am trying to deserialize.

[
  {
    "colorData": [
      255,
      255,
      255
    ],
    "Neighbours": [
      {
        "Item1": 0,
        "Item2": [
          {
            "colorData": [
              255,
              255,
              255
            ],
            "numberOfExamples": 188
          },
          {
            "colorData": [
              255,
              24,
              0
            ],
            "numberOfExamples": 15
          }
        ]
      },
      {
        "Item1": 1,
        "Item2": [
          {
            "colorData": [
              255,
              255,
              255
            ],
            "numberOfExamples": 188
          },
          {
            "colorData": [
              255,
              24,
              0
            ],
            "numberOfExamples": 15
          }
        ]
      },
      {
        "Item1": 2,
        "Item2": [
          {
            "colorData": [
              255,
              255,
              255
            ],
            "numberOfExamples": 188
          },
          {
            "colorData": [
              255,
              24,
              0
            ],
            "numberOfExamples": 15
          }
        ]
      },
      {
        "Item1": 3,
        "Item2": [
          {
            "colorData": [
              255,
              255,
              255
            ],
            "numberOfExamples": 188
          },
          {
            "colorData": [
              255,
              24,
              0
            ],
            "numberOfExamples": 15
          }
        ]
      }
    ]
  }
]

This is the object I'm trying to deserialize it into:

public partial class ImageBrainData_Reader
{
    public int[] colorData { get; set; }
    public List<Neighbour_Reader> neighbours { get; set; }
}

public partial class Neighbour_Reader
{
    public int direction { get; set; }
    public List<NeighbourData_Reader> neighbourData_Reader { get; set; }     
}

public partial class NeighbourData_Reader
{
    public int[] colorData { get; set; }
    public int numberOfExamples { get; set; }
}

And this is what I'm doing to load it from a file:

 List<ImageBrainData_Reader> dataRead = JsonConvert.DeserializeObject<List<ImageBrainData_Reader>>(File.ReadAllText(fileName + ".json"));

The first part (colorData) gets brought in and the correct amount of nested Neighbours, but none of the data from them (Item1 and Item2) are being read. Instead of getting the data, they are defaulting to their default values (0 and null, respectively).

Upvotes: 1

Views: 3099

Answers (1)

Brian Rogers
Brian Rogers

Reputation: 129667

Json.Net doesn't have any way to know that Item1 maps to direction and Item2 maps to neighbourData_Reader unless you tell it. You either need to add some [JsonProperty] attributes as shown below, or rename your properties to match the JSON.

public partial class Neighbour_Reader
{
    [JsonProperty("Item1")]
    public int direction { get; set; }
    [JsonProperty("Item2")]
    public List<NeighbourData_Reader> neighbourData_Reader { get; set; }
}

Fiddle: https://dotnetfiddle.net/ajE0HD

Upvotes: 2

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