I got error in ASP.net core MVC and Azure iot hub

I`m Novice
Now I try to use ASp.net core to get some in Azure iot hub with this tutorial:https://ztirom.at/2016/03/frist-steps-azure-iot-hub/
but when I got a some error

What is something wrong happen?
how can I fix it or Another way to get some data from iot hub.
thank you everyone

this is my iothubconnectionstring part

1 Answer
1

I follow this tutorial to create an ASP.NET Core MVC application. Install Microsoft.Azure.Devices(version 1.17.0) from NuGet. Call the regManager.GetDevicesAsync() in the controller and get the result successfully.

ManageDevices.cs in Controllers:

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.Devices;
using Microsoft.Azure.Devices.Common.Exceptions;

// For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860

namespace WebApplication1.Controllers

public class ManageDevices : Controller

public static string IOTHUBSTRING = "HostName=[IOT HUB NAME].azure-devices.net;SharedAccessKeyName=iothubowner;SharedAccessKey=[KEY]";


// GET: /<controller>/
public string Index()

return "This is my default action...";


public IActionResult GetDevices()

GetDevicesAsync();
return View();


public async static Task<IEnumerable> GetDevicesAsync(int deviceCount = 8)


var regManager = RegistryManager.CreateFromConnectionString(IOTHUBSTRING);

var devices = await regManager.GetDevicesAsync(deviceCount);

foreach (var device in devices)

string deviceId = device.Id;
DeviceStatus status = device.Status;


return devices;





You can use the following URI to execute the GetDevices method:

https://localhost:44387/ManageDevices/GetDevices


The result of the got devices:

You can have a try to see if it helps.

Update:

You can access the following device datas:

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