I want to convert a c# list into a JArray

Question

IF I USED JARRAY.FROMOBJECT i get an empty skeleton json, can someone help me letting me know how to convert the list into a jarray. Thanks

class EGTenantCreated
{
internal string id { get; set; }
internal string subject { get; set; }
internal EGData data { get; set; }
internal string eventType { get; set; }
internal string eventTime { get; set; }
internal string dataVersion { get; set; }
internal string metadataVersion { get; set; }
internal string topic { get; set; }
}

class EGData
{
internal string TenantId { get; set; }
internal string TenantName { get; set; }
internal string AdministratorEmail { get; set; }
internal string ProductId { get; set; }
internal string PackageInstanceId { get; set; }
internal string CorrelationId { get; set; }
}

public List<EGTenantCreated> UpdateEGTenant()
{
DateTime date = new DateTime();
string tenantName = "Tenant" + date.Day.ToString() + date.Month.ToString() + 
date.Year.ToString() + "_"
+ date.Hour.ToString() + date.Minute.ToString();

string adminEmail = "user" + date.Day.ToString() + date.Month.ToString() + 
date.Year.ToString() + "_"
+ date.Hour.ToString() + date.Minute.ToString() + "@testmail.com";

EGData egData = new EGData();
egData.TenantId = Guid.NewGuid().ToString();
egData.TenantName = tenantName;
egData.AdministratorEmail = adminEmail;
egData.ProductId = "Erp";
egData.PackageInstanceId = "522b0dc0-5db9-437d-97cc-cd4c742b1b22";
egData.CorrelationId = Guid.NewGuid().ToString();

EGTenantCreated egTenant = new EGTenantCreated();
egTenant.id = Guid.NewGuid().ToString();
egTenant.subject = "/DeploymentRegistry/TenantCreated";
egTenant.eventType = "TenantCreated";
egTenant.eventTime = "2019-10-04T20:02:54.9411815Z";
egTenant.dataVersion = "1.0.0";
egTenant.metadataVersion = "1";
egTenant.topic = "topictest";
egTenant.data = egData;

List<EGTenantCreated> list = new List<EGTenantCreated>();
list.Add(egTenant);

return list;
}
var list = UpdateEGTenant();
var jArray = JArray.FromObject(list);  //here i get an empty json

Here is where i get the error, when i print the jArray.ToString() I get an empty json skeleton and am not getting my list converted into a jarray object thats what am expecting. This is real code.

Based on the docs it looks like you could use [this constructor](https://www.newtonsoft.com/json/help/html/M_Newtonsoft_Json_Linq_JArray__ctor_3.htm): `var jDog = new JArray(doglist);` — Ed Gibbs, Nov 05 '19 at 01:05
I don't understand why this question has been upvoted. OP has stated an issue that doesn't seem to exist, and hasn't provided a reproduction case. — ProgrammingLlama, Nov 05 '19 at 01:16
Get this error System.ArgumentException: 'Could not determine JSON object type for type Dog — Josue Augusto Ramirez, Nov 05 '19 at 01:28
When i do it I get an empty json skeleton it prints this: [ {} ] — Josue Augusto Ramirez, Nov 05 '19 at 01:36
Please [edit your question](https://stackoverflow.com/posts/58703036/edit) to provide a [mcve] (the smallest amount of code necessary to demonstrate the problem fully). Without this it's impossible to tell you why your code isn't working. — ProgrammingLlama, Nov 05 '19 at 01:39
I already edited with real code, hope i can get help from you guys — Josue Augusto Ramirez, Nov 05 '19 at 01:46
Yeap @john, I move them to public, and now it works. How do you know it need to be moved to public? — Josue Augusto Ramirez, Nov 05 '19 at 01:51
@Josue Because I tested it. Also, I just found [this question](https://stackoverflow.com/questions/40408110/what-am-i-doing-wrong-with-json-nets-jsonconvert) which suggests another way of making it work. — ProgrammingLlama, Nov 05 '19 at 01:54
Related or duplicate: [Why are some members missing when trying to print an object by serializing to JSON?](https://stackoverflow.com/q/48156976/3744182). — dbc, Nov 05 '19 at 03:25

score 1 · Accepted Answer · answered Nov 05 '19 at 01:52

The issue you're seeing is because your properties are internal. To work around this, you could make them public and the class internal (which is the default if no modifier is specified), or you could place the JsonProperty attribute on each property:

class EGTenantCreated
{
    [JsonProperty]
    internal string id { get; set; }
    [JsonProperty]
    internal string subject { get; set; }
    [JsonProperty]
    internal EGData data { get; set; }
    [JsonProperty]
    internal string eventType { get; set; }
    [JsonProperty]
    internal string eventTime { get; set; }
    [JsonProperty]
    internal string dataVersion { get; set; }
    [JsonProperty]
    internal string metadataVersion { get; set; }
    [JsonProperty]
    internal string topic { get; set; }
}

class EGData
{
    [JsonProperty]
    internal string TenantId { get; set; }
    [JsonProperty]
    internal string TenantName { get; set; }
    [JsonProperty]
    internal string AdministratorEmail { get; set; }
    [JsonProperty]
    internal string ProductId { get; set; }
    [JsonProperty]
    internal string PackageInstanceId { get; set; }
    [JsonProperty]
    internal string CorrelationId { get; set; }
}

Try it online

I want to convert a c# list into a JArray

1 Answers1