Resolving: Newtonsoft.Json.JsonReaderException: Could not convert string to boolean

Issue Description

Newtonsoft.Json serialization gives error while converting the string to boolean types.

Newtonsoft.Json.JsonReaderException: ‘Could not convert string to boolean: 1. Path ‘[0].ID’, line 1, position 10.’

Resolution

This issue can be resolved by using a few approaches. The simplest approach would be to use a custom JSON converter so as to be able to serialize the required properties as required in the target object.

In the above case, i can create a Custom boolean converter to generate the required serialization objects.

Sample converter used as below,

        var result = JsonConvert.SerializeObject(excelasTable);
                var generatedType = JsonConvert.DeserializeObject<T>(result, new CustomBooleanJsonConverter());
                return (T)Convert.ChangeType(generatedType, typeof(T));

Custom Boolean JSON Converter

Custom Boolean Json Converter created as below which can be passed as the second argument to DeserializeObject method.

JsonConvert.DeserializeObject<T>(result, new CustomBooleanJsonConverter());

Please remember to override two below method,

• ReadJson
• WriteJson

public class CustomBooleanJsonConverter : JsonConverter<bool>
        {
            public override bool ReadJson(JsonReader reader, Type objectType, bool existingValue, bool hasExistingValue, JsonSerializer serializer)
            {
                return Convert.ToBoolean(reader.ValueType == typeof(string) ? Convert.ToByte(reader.Value) : reader.Value);
            }

            public override void WriteJson(JsonWriter writer, bool value, JsonSerializer serializer)
            {
                serializer.Serialize(writer, value);
            }
        }

That’s all. The issue is resolved!

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