I have a model from a library like below and it cannot be changed.
public class Request
{
[JsonProperty("firstName", Required = Required.Always)]
public string FirstName { get; set; }
[JsonProperty("lastName", Required = Required.Always)]
public string LastName { get; set; }
}
Now, if I initialize it with a field null and try to serialize it, it errors out (Example below).
var request = new Request() { FirstName = "John" };
var obj = JsonConvert.SerializeObject(request);
Newtonsoft.Json.JsonSerializationException : Cannot write a null value for property 'lastName'. Property requires a value. Path ''.
I want to serialize without any kind of validation. My requirement is to get output as below:
{
"firstName": "John",
"lastName": null,
}
CodePudding user response:
You can iterate each property and override that setting using a custom contract resolver:
class IgnoreRequiredContractResolver : DefaultContractResolver
{
protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
{
var props = base.CreateProperties(type, memberSerialization);
foreach (var prop in props)
{
prop.Required = Required.Default;
}
return props;
}
}
then
var obj = JsonConvert.SerializeObject(request, new JsonSerializerSettings
{
ContractResolver = new IgnoreRequiredContractResolver()
});
and your resulting json will be
{"firstName":"John","lastName":null}