How to Map Nested JSON Properties to Class Properties in C#?

Map the sub -attributes of the json object to the class attribute

When encountering JSON data with a layered structure, you may want to map the sub -attributes of JSON complex objects to the simple attributes in the class. Although the newTonsoft.json framework provides

attributes to mappore the original JSON data, it does not support mapping attributes.

[DataMember] However, there are some ways to achieve this mapping. A simple method is to sequence JSON back to

and use

to retrieve the required sub -attributes. JObject SelectToken For example, consider the following JSON data:

To map the

<code class="language-json">{
    "picture": {
        "id": 123456,
        "data": {
            "type": "jpg",
            "url": "http://www.someplace.com/mypicture.jpg"
        }
    }
}</code>

attributes of sub -attributes to the class, you can use the following code:

url ProfilePicture If you need a more advanced solution, you can customize

to enable

<code class="language-csharp">string json = @"
{
    ""picture"": 
    {
        ""id"": 123456,
        ""data"": 
        {
            ""type"": ""jpg"",
            ""url"": ""http://www.someplace.com/mypicture.jpg""
        }
    }
}";

JObject jo = JObject.Parse(json);
Person p = jo.ToObject<Person>();
p.ProfilePicture = (string)jo.SelectToken("picture.data.url");</code>

attributes to work as expected. This converter will fill all attributes with the path specified in the attribute.

JsonConverter For example, consider the following JSON data: JsonProperty

To deserture JSON and map the sub -attributes to the simple attributes in the class, you can use the following custom converter:

<code class="language-json">{
  "name": "Joe Shmoe",
  "age": 26,
  "picture": {
    "id": 123456,
    "data": {
      "type": "jpg",
      "url": "http://www.someplace.com/mypicture.jpg"
    }
  },
  "favorites": {
    "movie": {
      "title": "The Godfather",
      "starring": "Marlon Brando",
      "year": 1972
    },
    "color": "purple"
  }
}</code>

With a custom converter, you can recal the json as usual as usual:

<code class="language-csharp">[JsonConverter(typeof(JsonPathConverter))]
class Person
{
    [JsonProperty("name")]
    public string Name { get; set; }

    [JsonProperty("age")]
    public int Age { get; set; }

    [JsonProperty("picture.data.url")]
    public string ProfilePicture { get; set; }

    [JsonProperty("favorites.movie")]
    public Movie FavoriteMovie { get; set; }

    [JsonProperty("favorites.color")]
    public string FavoriteColor { get; set; }
}</code>

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