Question

Lets say I have this JSON string

{"name": "myname", "id":12345, "passs":"configpass"}

Now passs is a typo. I’d like my serialization code (I can use json.net or the built in one in system.web) to throw an exception if it has a key (passs) which is not in my class. This way silly typos doesn’t cause frustration.

Answer 1

For the Json.Net serializer you can use the MissingMemberHandling in the JsonSerializerSettings

[TestFixture]
public class JsonTests
{
    [TestCase(@"{""name"": ""myname"", ""id"":12345, ""passs"":""configpass""}", ExpectedException = typeof(JsonSerializationException))]
    [TestCase(@"{""name"": ""myname"", ""id"":12345, ""pass"":""configpass""}")]
    public void TestName(string arg1)
    {
        JsonSerializer jsonSerializer = JsonSerializer.Create(
            new JsonSerializerSettings {MissingMemberHandling = MissingMemberHandling.Error});
        Credentials credentials = jsonSerializer.Deserialize<Credentials>(new JsonTextReader(new StringReader(arg1)));
    }
}

public class Credentials
{
    public string Name { get; set; }
    public int Id { get; set; }
    public string Pass { get; set; }
}