CODEWITHSUNDEEP
c#
hitachi7
hitachi7

Reputation: 63

C# - deserialize JSON object

I am trying to bind the following json to a list, note that each string can contain more than one element, so the list would look like this:

red,black

blue

orange,blue,red,black,pink

[
 {
    "shoes": [
      "red",
      "black"
    ]
  },
  {
    "shoes": [
      "blue"
    ]
  },
  {
    "shoes": [
      "orange",
      "blue",
      "red",
      "black",
      "pink"
    ]
  }
]

Here is what I have so far, it's not much:

public class Shoes
{
   [JsonProperty("colors")]
   public IList<string> Colors { get; set; }
}

within main, I am calling the actual link (unfortunately I can't provide it here) 

using (WebClient wc = new WebClient())
{               
    string json = wc.DownloadString(@"JSONlink");
    Shoes shoe = JsonConvert.DeserializeObject<Shoes>(json);
}

It gives me the following error:

Cannot deserialize the current JSON array (e.g. [1,2,3]) into type 'xxx' because the type requires a JSON object (e.g. {"name":"value"}) to deserialize correctly.

I don't have a lot of experience in this area, so any help would be great. Thanks.

Upvotes: 4

Views: 195

Answers (3)

RagtimeWilly
RagtimeWilly

Reputation: 5445

The sample JSON contains a list of objects, each an element representing a Shoe. The property representing the collection of colours in the JSON is called shoes so the class should look like this:

public class Shoe
{
   [JsonProperty("shoes")]
   public IList<string> Colors { get; set; }
}

You also need to de-serialize to a collection of shoes not a single instance:

var shoes = JsonConvert.DeserializeObject<List<Shoe>>(json);

Upvotes: 4

Gaurang Dave
Gaurang Dave

Reputation: 4046

Your C# class is wrong.

Use this class : 

public class Result
{
    public List<string> shoes { get; set; }
}

Deserialization : 

using (WebClient wc = new WebClient())
{               
    string json = wc.DownloadString(@"JSONlink");
    var result = JsonConvert.DeserializeObject<List<Result>>(json);
}

Upvotes: 1

Mikolaj Kieres
Mikolaj Kieres

Reputation: 4403

It looks like your data model is incorrect compared to your JSON. I would suggest going to json2csharp page and pasting JSON there to get the C# generated class

I already did that for you:

public class RootObject
{
    public List<string> shoes { get; set; }
}

Upvotes: 1

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