How to deserialize enum and array in .NET 5

Question

jqgrid filter deserialization in ASP.NET 5 MVC application fails using System.Text.Json.JsonSerializer

To reproduce, run the code

var _filters ="{\"groupOp\":\"AND\",\"rules\":[{\"field\":\"Toode\",\"op\":\"cn\",\"data\":\"\"}]}";

var filtersList = JsonSerializer.Deserialize<Filter>(_filters, new JsonSerializerOptions
                { 
                    PropertyNameCaseInsensitive = true
                });

Result:

The JSON value could not be converted to MyApp.Controllers.GroupOp. Path: $.groupOp | LineNumber: 0 | BytePositionInLine: 16.


System.Text.Json.JsonException: The JSON value could not be converted to MyApp.Controllers.GroupOp. Path: $.groupOp | LineNumber: 0 | BytePositionInLine: 16.
   at System.Text.Json.ThrowHelper.ThrowJsonException(String message)
   at System.Text.Json.Serialization.Converters.EnumConverter`1.Read(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options)
   at System.Text.Json.JsonPropertyInfo`1.ReadJsonAndSetMember(Object obj, ReadStack& state, Utf8JsonReader& reader)
   at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.TryRead(Utf8JsonReader& reader, Type typeToConvert, JsonSerializerOptions options, ReadStack& state, T& value)
   at System.Text.Json.Serialization.JsonConverter`1.ReadCore(Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](JsonConverter jsonConverter, Utf8JsonReader& reader, JsonSerializerOptions options, ReadStack& state)
   at System.Text.Json.JsonSerializer.ReadCore[TValue](Utf8JsonReader& reader, Type returnType, JsonSerializerOptions options)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, Type returnType, JsonSerializerOptions options)
   at System.Text.Json.JsonSerializer.Deserialize[TValue](String json, JsonSerializerOptions options)

jqgrid classes used in deserialization:

public class Filter
{
    public GroupOp GroupOp { get; set; }
    public List<Rule> Rules { get; set; }
    public List<Filter> Groups { get; set; }
}

public enum GroupOp
{
    AND,
    OR
}

public class Rule
{
    public string Field { get; set; }
    public Operations Op { get; set; }
    public string Data { get; set; }
}

public enum Operations
{
    eq,
    ne,
    cn,
    le
}

In .NET 4.6 it worked using

var serializer = new JavaScriptSerializer();
var filtersList = serializer.Deserialize<Filter>(_filters);

How to make it work in .NET 5 ?

Answer 1

In Net 5 you have to install Newtonsoft.Json using Nuget. This code allows to deserilize

var _filters = "{\"groupOp\":\"AND\",\"rules\":[{\"field\":\"Toode\",\"op\":\"cn\",\"data\":\"\"}]}";
    var filtersList = JsonConvert.DeserializeObject<Filter>(_filters);
    
}


public class Filter
{
    public GroupOp groupOp { get; set; }
    public List<Rule> rules { get; set; }
    
}