UpdateComplexObjectWithDT

UpdateComplexObjectWithDT.cs

using Microsoft.Azure.Devices;
using Microsoft.Azure.Devices.Client;
using Microsoft.Azure.Devices.Serialization;
using Microsoft.Azure.Devices.Shared;
using Newtonsoft.Json;
using System;
using System.Threading.Tasks;

namespace rido_learn_WritableProperties
{
    class Program
    {

        class CommandArguments : BasicDigitalTwin
        {
            [JsonProperty("$metadata")]
            public new CommandArgumentsMetadata Metadata { get; set; }
            public string CommandId { get; set; }
            [JsonProperty("Arguments", NullValueHandling = NullValueHandling.Ignore)]
            public string Arguments { get; set; }
            [JsonProperty("Action", NullValueHandling = NullValueHandling.Ignore)]
            public int? Action { get; set; }
        }

        class CommandArgumentsMetadata : DigitalTwinMetadata
        {
            [JsonProperty("CommandArguments")]
            public WritableProperty CommandArguments { get; set; }
        }

        static async Task Main(string[] args)
        {
            var cs = "HostName=.azure-devices.net;DeviceId=osConfigDemo;SharedAccessKey=";
            var client = DeviceClient.CreateFromConnectionString(cs,
                 Microsoft.Azure.Devices.Client.TransportType.Mqtt_WebSocket_Only,
                 new ClientOptions { ModelId = "dtmi:osconfig:commandrunner;1" });

            await client.SetDesiredPropertyUpdateCallbackAsync(async (TwinCollection desiredProperties, object userContext) =>
            {
                Console.WriteLine(desiredProperties.ToJson(Formatting.Indented));

            }, null);


            await ServiceUpdate();
            Console.ReadLine();
        }

        static async Task ServiceUpdate()
        {
            var scs = "HostName=.azure-devices.net;SharedAccessKeyName=iothubowner;SharedAccessKey=";
            DigitalTwinClient dtc = DigitalTwinClient.CreateFromConnectionString(scs);

            CommandArguments cmdArgs = new CommandArguments { CommandId = "One", Arguments = "argsOne", Action = 1 };
            var updateOperation = new UpdateOperationsUtility();
            updateOperation.AppendAddPropertyOp("/CommandArguments", cmdArgs);
            var op = updateOperation.Serialize();
            Console.WriteLine(op);
            await dtc.UpdateDigitalTwinAsync("osConfigDemo", op);

        }
    }
}

this code sends

[
    {
        "op": "add",
        "path": "/CommandArguments",
        "value": {
            "$metadata": {},
            "CommandId": "One",
            "Arguments": "argsOne",
            "Action": 1
        }
    }
]

produces the next twin, note the __t:c marker that is not expected

{
  "CommandArguments": {
    "__t": "c",
    "CommandId": "One",
    "Arguments": "argsOne",
    "Action": 1
  },
  "$version": 11
}