Enum deserializes to 0 for invalid values

Asked Dec 18 '17 at 19:35

Active Dec 18 '17 at 19:35

Viewed 62 times

I have an API which is initialized as follows:

var formatter = GlobalConfiguration.Configuration.Formatters.JsonFormatter;
formatter.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();
formatter.SerializerSettings.Converters.Add(new StringEnumConverter { CamelCaseText = true });

My enum looks similar to following:

public enum EventType
{        
    Value1 = 1,
    Value2 = 5,        
    Value3 = 3,
    Value4 = 4        
}

And the class where it used as follows:

public class ManualEventModel
{
    public Guid Id { get; set; }

    public EventType EventType { get; set; }

    public DateTime Timestamp { get; set; }

    public bool Active { get; set; }
}

Now if I call the API with EventType=Value5 or any other illegal value, I get no error but the value of the property EventType is set to 0.

How do I filter out the illegal values?

asked Dec 18 '17 at 19:35

Azimuth

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2

what do you want it to set the property as? – Daniel A. White Dec 18 '17 at 19:38
1

Try setting EventType property to a nullable. It might yield the behaviour you seek. – SimonGates Dec 18 '17 at 19:41
I've tested this with version `10.0.3` of `Newtonsoft.Json` and it throws an exception. – huysentruitw Dec 18 '17 at 19:48
@SimonGates great! Exactly what I needed! – Azimuth Dec 19 '17 at 06:14
@WouterHuysentruit I tried with `Newtonsoft.Json` version `10.0.3` - no exception but the enum property is deserialized to 0. – Azimuth Dec 19 '17 at 06:29
I tested with `JsonConvert.DeserializeObject`, not sure what the difference is. Anyway, glad you have it working with the nullable approach. – huysentruitw Dec 19 '17 at 08:06
@WouterHuysentruit I'm deserializing manually but I use `[FromBody]` in my API method. – Azimuth Dec 20 '17 at 08:00

Enum deserializes to 0 for invalid values

0 Answers0