Convert an int to bool with Json.Net [duplicate]

Question

I am calling a webservice and the returned data for a bool field is either 0 or 1 however with my model I am using a System.Bool

With Json.Net is it possible to cast the 0/1 into a bool for my model?

Currently I am getting an error

Newtonsoft.Json.JsonSerializationException: Error converting value "0" to type 'System.Boolean'

Any help would be awesome!!

starball · Accepted Answer · 2022-12-24 02:12:58Z

120

Ended up creating a converter:

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);
    }
}

Then within my model:

 [JsonConverter(typeof(BoolConverter))]
    public bool active { get; set; }

edited Dec 24, 2022 at 2:12

starball♦

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answered Jan 20, 2013 at 19:07

Diver Dan

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3 Comments

Jorge Yanes Diez Over a year ago

Depending on the situation, you may also need bool? in CanConvert

Grengas Over a year ago

And is there possibly a way to apply this custom converter to all bool properties throughout all objects without adding JsonConverter attributes?

Alex Over a year ago

Changing the ReadJson to return reader.Value != null && reader.Value.ToString() == "1"; will account for null values

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