Convert Dictionary<string,object> to Dictionary<string,class> in c#

Question

I have a Jtoken having structure as. The below structure have even more properties than below but I have to use only the below ones

{{ "PersonId": 1234, "State": "Florida", "Gender": "Male", "Married ": 1, "SalaryUnderHundredDollar ": 1, }} 

I have created a class Person as

public class Person
{
  public int PersonId {get;set;}
  public string State {get;set;}
  public string Gender {get;set;}
  public bool Married {get; set}
  public bool SalaryUnderHundredDollar {get;set}
}

I am converting the above Jtoken into dictionary as :

var dict = jtoken.First.ToObject<Dictionary<string, object>>().ToDictionary(x => x.Key, x => x.Value);

This will give all the properties of the Person but I want only the above ones.And now I have to convert

     Dictionary<string,object> to Dictionary<string,class>

I am doing the following:

 var dict2= dict.Where(x => fieldsRequired.Contains(x.Key)).ToDictionary(x => x.Key, x => (Person)x.Value);

fieldsRequired is a list of string fields which I need since in Jtoken there are number of fields.

But this conversion is not working.

Any help?

Answer 1

Modify your class as:

public class Person
{
  public int PersonId {get;set;}
  public string State {get;set;}
  public string Gender {get;set;}
  public int Married {get; set}
  public int SalaryUnderHundredDollar {get;set}
}

And then use:

var person = jtoken.First.ToObject<Person>();

The problem is that bool properties are represented as 0 and 1 in your JSON. So instead we change the type of the properties in your class to int as well.

A better alternative would be to fix the JSON to have true and false instead of 0 and 1 . Also it is quite weird the JSON is wrapped in double curly braces and the "Married " and "SalaryUnderHundredDollar " properties contain a space at the end. Those problems should be fixed as well.

Also you can write a custom JsonConverter to convert the values appropriately from 0 and 1 to bool . See answer here .

Putting the suggestions together and fixing the double curly braces and spaces in property names results in this:

public class BoolConverter : JsonConverter
{
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
    {
        writer.WriteValue(((bool)value) ? 1 : 0);
    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
    {
        return reader.Value.ToString() == "1";
    }

    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(bool);
    }
}

public class Person
{
    public int PersonId { get; set; }
    public string State { get; set; }
    public string Gender { get; set; }
    [JsonConverter(typeof(BoolConverter))]
    public bool Married { get; set; }
    [JsonConverter(typeof(BoolConverter))]
    public bool SalaryUnderHundredDollar { get; set; }
}


class Program
{
    static void Main(string[] args)
    {
        string json =
            @"{ ""PersonId"": 1234, ""State"": ""Florida"", ""Gender"": ""Male"", ""Married"": 1, ""SalaryUnderHundredDollar"": 1 }";

        var jObject = JObject.Parse(json);
        var person = jObject.ToObject<Person>();
    }
}