我如何获得数据从json与linq

Question

[
  {
    "id": "133",
    "label": "S/M",
    "price": "0",
    "oldPrice": "0",
    "products": [
      "318",
      "321",
      "324",
      "327"
    ]
  },
  {
    "id": "132",
    "label": "L/XL",
    "price": "0",
    "oldPrice": "0",
    "products": [
      "319",
      "322",
      "325",
      "328"
    ]
  },
  {
    "id": "131",
    "label": "XXL/XXXL",
    "price": "0",
    "oldPrice": "0",
    "products": [
      "320",
      "323",
      "326",
      "329"
    ]
  }
]

我想获得数组"products"中包含"321"的" label "。我怎么能做到呢?我使用了json.net库

i make linq expression 
JArray ja = JArray("this json");
JValue id = JValue.Parse("328");
ja.Select(x => x["label"]).Where(x => x["products"].Contains(id));

但我得到"无法访问Newtonsoft.Json.Linq.JValue的子值。"

Answer 1

所以你应该先定义这个类:

class MyObj {
public string id { get; set; }
public string[] products { get; set; }
public string label { get; set; }
}

反序列化，而不是object:

 var deserialized = serializer.Deserialize<MyObj>(str);
 var result =  deserialized.Where(r => r.products.Contains("321")).ToList();

Answer 2

为此，您可以使用任何JSON库。例如JSON。净

这个LINQ到JSON的示例

Answer 3

您需要使用JSON.NET之类的库。在这种情况下，你可以这样写

string json = <your json string>;
var deserializedProduct = JsonConvert.DeserializeObject<List<Product>>(json).Where(p => p.products.Contains("321")).ToList();

其中Product为

public class Product
{
    public string id { get; set; }
    public string[] products { get; set; }
    public string label { get; set; }
}