Newtonsoft - how to throw exception if property is missing?

Question

I have a simple function:

public JsonResult FetchData(object obj)
{
  var jsonData = new { dateTime = DateTime.Today };
  jsonData = JsonConvert.DeserializeAnonymousType(obj.ToString(), jsonData);
}

CASE A: If I use json data {"dateTime":"2018-09-24"} I can get right date: 2018-09-24

CASE B: If I use json data, variable name has a blank space {"dateTime ":"2018-09-24"} I get date: 0001-01-01, without any exception. "dateTime " is not a valid variable name for me

The behaviour I want is for CASE B to throw an exception or notice this case is invalid. How do I achieve that?

Thanks

Avoid CASE B by not having identifiers with spaces in them! – DavidG Sep 25 '18 at 09:59 — DavidG, Sep 25 '18 at 09:59
I add an additional check "jsonData.dateTime – Rock Nov 30 '18 at 02:21 — Rock, Nov 30 '18 at 02:21

score 0 · Answer 1 · answered Sep 25 '18 at 10:04

0

Use a proper data structure to deserialise and you can control the property names with the JsonProperty attribute:

public class Foo
{
    [JsonProperty("dateTime ")] //Note the space in here
    public DateTime DateTime { get; set; }
}

And now deserialise like this:

var result = JsonConvert.DeserializeObject<Foo>(json);

answered Sep 25 '18 at 10:04

DavidG

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I want CASE B throw an exception – Rock Sep 25 '18 at 10:05
2

That's not what your question says. – DavidG Sep 25 '18 at 10:06

Newtonsoft - how to throw exception if property is missing?

1 Answers1