Newtonsoft - how to throw exception if property is missing? [duplicate]

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

I add an additional check "jsonData.dateTime<new DateTime(2010,1,1)" to avoid the invalid data. — Rock
– Rock, Commented Nov 30, 2018 at 2:21

DavidG · Accepted Answer · 2018-09-25 10:04:13Z

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, 2018 at 10:04

DavidG

120k13 gold badges232 silver badges239 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Rock Over a year ago

I want CASE B throw an exception

DavidG Over a year ago

That's not what your question says.

Collectives™ on Stack Overflow

Newtonsoft - how to throw exception if property is missing? [duplicate]

1 Answer 1

2 Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Linked

Related