Question

我是c＃的完全初学者，并且不断收到此错误＆＃34; CS1501方法＆＃39; GetDeviceSelector＆＃39;需要2个参数＆＃34;

Visual Studio建议将SerialDevice.GetDeviceSelector(vid, pid)更改为SerialDevice.GetDeviceSelectorFromUsbVidPid(vid, pid)。

这有效，但是当我在Windows 10 IoT Core上的Raspberry pi 3上运行调试时，它返回： Exception thrown: 'System.ArgumentOutOfRangeException' in mscorlib.ni.dll Specified argument was out of the range of valid values. Parameter name: index

我的目标是将我的Arduino连接到我的Raspberry pi并通过串口与它进行通信。（我不想使用微软制造商的东西）

这里是完整的代码：

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();
    }*/
  }
}

编辑：我更改了一些行以使其正常工作

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;
        }

但我发现了一个新问题...... 这serialDevice = await SerialDevice.FromIdAsync(myDevices[0].Id); 返回null

功能正确（当我将其与Microsoft的样本进行比较时）

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

Answer 1

我将ushort更改为UInt16，解决了System.ArgumentOutOfRangeException错误。

该解决方案

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

返回null

正在将变量 serialDevice 更改为 serialPort ，这是出于某种恼人的原因......

编辑：它曾经工作过一次，它再次被打破......任何想法？

编辑2：有人给了我solution

没有方法的重载＆＃39; GetDeviceSelector＆＃39;需要2个参数

1 个答案: