Deserialize string to double

Question

I have this JSON:

{
   "price": "0.002200"
}

I'd like to deserialize price to double, but it is a string.

How can I do?

Answer 1

You would just create a class to map the JSON:

public class RootObject
{
    public double price { get; set; }
}

Then just deserialize with JsonConvert.DeserializeObject:

JsonConvert.DeserializeObject<RootObject>(json)

Full Program:

using Newtonsoft.Json;

public class RootObject
{
    public double price { get; set; }
}

public class Program
{
    public static void Main()
    {
        var json = @"{""price"": ""0.002200""}";

        var root = JsonConvert.DeserializeObject<RootObject>(json);

        Console.WriteLine(root.price);
        // 0.0022
    }   
}

Note: This assumes you have the Newtonsoft.Json NuGet package installed.

Answer 2

One option is to create class that represents the JSON and deserialize into that class:

class Program
{
    static void Main(string[] args)
    {
        var json = "{ \"price\": \"0.002200\" }";

        var data = JsonConvert.DeserializeObject<Data>(json);

        Console.WriteLine(data.Price);
    }
}

class Data
{
    public double Price { get; set; }
}