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Dag Hammarskjold
Dag Hammarskjold

Total Post:24

Posted on    June-20-2013 3:20 AM


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Hi Guys,

I get an error that is 'Could not convert string to integer: 3.500. Path 'Quantity'' while json converting to object.

json :


public class UnitPrice
    public int UnitPriceId { get; set; }
    public int QuantityMin { get; set; }
    public int QuantityMax { get; set; }
    public decimal Price { get; set; }
    public string ProductCalcKey { get; set; }
    public PaperType? PaperType { get; set; }
    public int Quantity { get; set; }
I am using the following method.

protected object FromJsonToObject(Type t)
    Context.Request.InputStream.Position = 0;
    string json;
    using (var reader = new StreamReader(Context.Request.InputStream))
        json = reader.ReadToEnd();

    // todo: string to integer such as '222.222.222'
    return JsonConvert.DeserializeObject(json, t, new IsoDateTimeConverter());

How can I solve this problem without touching jsontext ?


Total Post:604

Posted on    June-20-2013 7:38 AM


I have solved the problem in this way.

public class FormatConverter : JsonConverter
    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        throw new NotImplementedException();

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        if (objectType == typeof(int))
            return Convert.ToInt32(reader.Value.ToString().Replace(".", string.Empty));

        return reader.Value;

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

public void ConvertJson()
    const string Json = "{\"ProductCalcKey\":\"xxx\",\"PaperType\":\"1\",\"Quantity\":\"3.500\"}";
    var o = (UnitPrice)JsonConvert.DeserializeObject(Json, typeof(UnitPrice), new FormatConverter());
    Assert.AreEqual(3500, o.Quantity);

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