方法'GetDeviceSelector'的重载没有2个参数

Question

I'm a complete beginner at c# and keep getting this error "CS1501 No overload for method 'GetDeviceSelector' takes 2 arguments"

Visual studio suggest to change SerialDevice.GetDeviceSelector(vid, pid) to SerialDevice.GetDeviceSelectorFromUsbVidPid(vid, pid) .

This works but when I run the debug on my Raspberry pi 3 on Windows 10 IoT Core it returns: Exception thrown: 'System.ArgumentOutOfRangeException' in mscorlib.ni.dll Specified argument was out of the range of valid values. Parameter name: index Exception thrown: 'System.ArgumentOutOfRangeException' in mscorlib.ni.dll Specified argument was out of the range of valid values. Parameter name: index

My goal is to connect my Arduino to my Raspberry pi and communicate with it through serial. (I don't want to use the Microsoft maker stuff)

Here's the full code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Windows.ApplicationModel.Background;
using Windows.Devices.SerialCommunication;
using Windows.Devices.Enumeration;
using System.Diagnostics;

// The Background Application template is documented at http://go.microsoft.com/fwlink/?LinkID=533884&clcid=0x409

namespace BackgroundApplication1
{
    public sealed class StartupTask : IBackgroundTask
    {
        //private String debugtest;
        private SerialDevice serialDevice = null;



    public void Run(IBackgroundTaskInstance taskInstance)
    {
        // 
        // TODO: Insert code to perform background work
        //
        // If you start any asynchronous methods here, prevent the task
        // from closing prematurely by using BackgroundTaskDeferral as
        // described in http://aka.ms/backgroundtaskdeferral
        //
        FindDevice();
        Debug.WriteLine("test1");
    }

    /*private async void ListAvailablePorts()
    {
        UInt32 vid = 0x045E;
        UInt32 pid = 0x0611;
        try
        {
            string aqs = SerialDevice.GetDeviceSelector(vid, pid);
            var dis = await DeviceInformation.FindAllAsync(aqs);

            //status.Text = "Select a device and connect";

            for (int i = 0; i < dis.Count; i++)
            {
                listOfDevices.Add(dis[i]);
            }

            DeviceListSource.Source = listOfDevices;
            comPortInput.IsEnabled = true;
            ConnectDevices.SelectedIndex = -1;
        }
        catch (Exception ex)
        {
            status.Text = ex.Message;
        }
    }*/

    private async void FindDevice()
    {
        Debug.WriteLine("begintest");
        ushort vid = 2341;
        ushort pid = 0001;

        string aqs = SerialDevice.GetDeviceSelectorFromUsbVidPid(vid, pid);

        var myDevices = await Windows.Devices.Enumeration.DeviceInformation.FindAllAsync(aqs);

        try
        {
            serialDevice = await SerialDevice.FromIdAsync(myDevices[0].Id);

            Debug.WriteLine("ok");

            /*serialDevice.WriteTimeout = TimeSpan.FromMilliseconds(1000);
            serialDevice.ReadTimeout = TimeSpan.FromMilliseconds(1000);
            serialDevice.BaudRate = 9600;
            serialDevice.Parity = SerialParity.None;
            serialDevice.StopBits = SerialStopBitCount.One;
            serialDevice.DataBits = 8;
            serialDevice.Handshake = SerialHandshake.None;

            String debugtest = "Serial port configured successfully: ";
            debugtest += serialDevice.BaudRate + "-";
            debugtest += serialDevice.DataBits + "-";
            debugtest += serialDevice.Parity.ToString() + "-";
            debugtest += serialDevice.StopBits;
            //debugtest += (DeviceInformation)myDevices[0];

            Debug.WriteLine(debugtest);*/
        }
        catch (Exception exception)
        {
            Debug.WriteLine(exception.Message.ToString());
            Debug.WriteLine("error");
        }
        finally        
        {
            Debug.WriteLine("Opened device for communication.");             
            Debug.WriteLine("test");
        }
        Debug.WriteLine("test2");
    }

    /*private void ShowStatus(string v)
    {
        throw new NotImplementedException();
    }*/
  }
}

edit: I changed some lines so that it works

UInt16 vid = 0x2341;
        UInt16 pid = 0x0001;

        string aqs = SerialDevice.GetDeviceSelectorFromUsbVidPid(vid, pid);

        var myDevices = await DeviceInformation.FindAllAsync(aqs);

        if (myDevices.Count == 0)
        {
            Debug.WriteLine("Device not found!");
            return;
        }

But I found a new problem... This serialDevice = await SerialDevice.FromIdAsync(myDevices[0].Id); returns null

The capabilities are correct (when I compare it to Microsoft's sample)

<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="serialcommunication">
  <Device Id="any">
    <Function Type="name:serialPort"/>
  </Device>
</DeviceCapability>

Answer 1

I changed the ushort to UInt16 which solved the System.ArgumentOutOfRangeException error.

The solution for that

serialDevice = await SerialDevice.FromIdAsync(myDevices[0].Id); 

returned null

is changing the variable serialDevice to serialPort for some annoying reason...

Edit: It worked once, it's broken again.... any ideas?

Edit 2: Someone gave me the solution