Newtonsoft JsonConvert.SerializeObject use property name insted of [JsonProperty("")]

Question

I have a class in my project which needs to be serialized for two different use cases. As I can't add two diffrent attributes to on property I would like to serialize the objects of the class one time with the [JsonProperty("attributname")] decleration and one time with the property name it self.

For ex:

public class Contact
{
    [JsonProperty("name")]
    public string Lastname { get; set; }
}

public class Program
{
    public void SerializeByJsonPropertyName()
    {
        var contact = new Contact()
        {
            Lastname = "Harber"
        }
        var requestJson = JsonConvert.SerializeObject(contact);
        // Serialized Object requestJson:
        // {
        //     "name" = "Harber"
        // }
    }

    public void SerializeByPropertyName()
    {
        var contact = new Contact()
        {
            Lastname = "Harber"
        }
        var requestJson = JsonConvert.SerializeObject(contact /*, ? Setting ?*/);
        // Serialized Object requestJson:
        // {
        //     "Lastname" = "Harber"
        // }
    }
}

The first szenario works totaly fine, but for the second szenario I could´t find any solution. Except creating two classes or duplicate the properties in my class.. IS there any setting in Newtonsofts JsonConverter for doing this?

Thanks for your help!

Here you can find a possible solution https://stackoverflow.com/questions/20622492/how-to-ignore-jsonpropertypropertyname-somename-when-serializing-json — Anton, Mar 26 '20 at 10:08

score 0 · Accepted Answer · answered Mar 26 '20 at 10:27

You can create different naming strategies, then create different settings, each setting has a Contract resolver, each contract resolver has a naming strategy, then you supply for each settings the naming strategy you want to use, something like this

public static class JsonSerializingSettings {

    public static JsonSerializerSettings JsonUnModified{ get; set; } = new JsonSerializerSettings
    {
        ContractResolver = new DefaultContractResolver() {
            NamingStrategy =  new UnmodifiedNamingStrategy()
        }
    };
    public static JsonSerializerSettings JsonDefault { get; set; } = new JsonSerializerSettings
    {
        ContractResolver = new DefaultContractResolver() {
            NamingStrategy =  new DefaultNamingStrategy()
        }
    };
 }
public class UnmodifiedNamingStrategy : NamingStrategy {


    protected override string ResolvePropertyName(string name) {
        return name;
    }

}

and when you want to use it

    var requestJson = JsonConvert.SerializeObject(contact,JsonSerializingSettings.JsonDefault);
    // Serialized Object requestJson:
    // {
    //     "name" = "Harber"
    // }

var requestJson = JsonConvert.SerializeObject(contact,JsonSerializingSettings.JsonUnModified);
    // Serialized Object requestJson:
    // {
    //     "Lastname" = "Harber"
    // }

Thanks for your answers! I implemented a combination of your answers, which solved my problem. Perfect! — marco, Mar 26 '20 at 10:31
[Good further Read](https://dotnetcoretutorials.com/2018/05/05/setting-json-serialization-configuration-at-runtime-on-a-net-core-api/), please mark my answer as correct if it was correct, thank you and I am glad I could help — Munzer, Mar 26 '20 at 10:33
@Munzer I tried it and worked on the first level object , but the nested objects are still the same — Hana, Jul 19 '20 at 17:37

Newtonsoft JsonConvert.SerializeObject use property name insted of [JsonProperty("")]

1 Answers1