Error when trying to use class/method of a library.

Question

I am trying to connect a WPF to an external hardware via usb. I installed the Hidsharp Nuget and declared the USB Devices as below:

HidDevice _device;
HidStream _deviceStream;
IEnumerable<HidDevice> _deviceList;

That within the public partial class MainWindow : Window. I created the method ConnectToUsb and within it use DeviceList from the library Hidsharp which has been declared as follows using HidSharp;

But VS is reporting me an error in DeviceList saying that it does not exist in that context, even though I have declared the library and even the method being within the main class. Someone has already been through this and would have a possible solution?

private async Task<bool> ConnectToUsb()
        {

            await Task.Delay(1000);
            try
            {
                //manda conectar no dispositivo
                _deviceList = DeviceList.Local.GetHidDevices();
                _device = _deviceList.FirstOrDefault(dev => dev.ProductID == _Pid && dev.VendorID == _Vid && dev.DevicePath.Contains("col01"));
                //inicia o background worker caso encontre
                if (_device != null)
                {
                    //Conecta na placa encontrada
                    _device.Open();
                    if (_device.TryOpen(out _deviceStream))
                    {
                        // TODO Mostrar a capacidade do HID
                        WriteLog($"Placa {cmbBoard.SelectedItem.ToString()} encontrada!", Brushes.Gray);

                        WriteLog("Comunicação estabelecida com sucesso", Brushes.Gray);
                        return true;
                    }
                    else
                    {
                        return false;
                    }
                }
                else
                {
                    //Não encontrou nenhum dispositivo
                    // WriteMessage("Erro na Conexão USB!", Brushes.Red);
                    WriteLog("Não foi possível encontrar nenhuma Placa!", Brushes.Red);
                    return false;
                }
            }
            catch (Exception ex)
            {

                MessageBox.Show("Erro ao tentar conectar ao dispositivo! " + ex.ToString());
                WriteLog("Erro ao tentar conectar ao dispositivo: " + ex.ToString(), Brushes.Gray);
                return false;
            }

        }

Answer 1

This class is not available in version 1.5.0. That, according to this previous question, is the version you have referenced.

In the section Assembly, in the class documentation you can check

Namespace: Hidsharp
Assembly: Hidsharp (in Hidsharp.dll) Version: 2.0.0-alpha

You can install this version, but keep in mind that it is a version alpha. It’s at your own risk.

To install it just use the command

PM> Install-Package HidSharp -Version 2.0.0-alpha

Answer 2

For the error message:

the name 'Devicelist' does not exist in the Current context.

I think maybe the problem is in your class, where you call:

 _deviceList = DeviceList.Local.GetHidDevices();

If you have more than one script/document that is using Hiddevice, then maybe in one of them you have forgotten to declare the using HidSharp;, check all documents that will use the class.