Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type 'Newtonsoft.Json.Linq.JArray'

Question

I am testing my Web API. Mocking the data I have this:

var objs = ((JArray)JsonConvert.DeserializeObject("{ \"PrintId\":10,\"Header\":\"header\",\"TC\":\"tc\",\"CompanyRef\":\"00000000-0000-0000-0000-000000000000\"}")).Values<JObject>(); 

Which gives me the error:

Unable to cast object of type 'Newtonsoft.Json.Linq.JObject' to type 'Newtonsoft.Json.Linq.JArray'

The thing is it was working. I must have changed something, but I don't know what.

My intent is to convert this JSON object to a list of .NET objects called Print which has the fields:

PrintId Header TX CompnayRef 

Answer 1

Just make a class and deserialize it.

public class Print {     public int PrintId { get; set; }     public string Header { get; set; }     public string TC { get; set; }     public string CompanyRef { get; set; } }  Print printObj = JsonConvert.DeserializeObject<Print>(yourJson); printObj.PrintId = //... 

Answer 2

As the message says, your object is JObject so don't cast it to JArray. Try this:

var objs = JsonConvert.DeserializeObject("{ \"PrintId\":10,\"Header\":\"header\",\"TC\":\"tc\",\"CompanyRef\":\"00000000-0000-0000-0000-000000000000\"}"); 

Update To get a collection List<Print>, your JSON needs to be an array. Try this (I made your JSON an array and added a second object):

string json = "[{ \"PrintId\":10,\"Header\":\"header\",\"TC\":\"tc\",\"CompanyRef\":\"00000000-0000-0000-0000-000000000000\"}"             + ",{ \"PrintId\":20,\"Header\":\"header2\",\"TC\":\"tc2\",\"CompanyRef\":\"00000000-0000-0000-0000-000000000000\"}]"; var objs = JsonConvert.DeserializeObject<List<Print>>(json);  //The loop is only for testing. Replace it with your code. foreach(Print p in objs){     Console.WriteLine("PrintId: " + p.PrintId);     Console.WriteLine("Header: " + p.Header);     Console.WriteLine("TC: " + p.TC);     Console.WriteLine("CompanyRef: " + p.CompanyRef);     Console.WriteLine("=============================="); }  public class Print {     public int PrintId { get; set; }     public string Header { get; set; }     public string TC { get; set; }     public string CompanyRef { get; set; } } 

Here is a fiddle.