问题描述
所以不久前,我做了一个Windows服务,该服务读出一个串行端口,根据返回的值,它将改变系统容量。问题是,当我运行该服务时,它停留在启动模式下,但仍按其应有的方式运行。但是如果您将其设置为“启动时自动启动”,它将无法正常工作。这是我第一次进行Windows服务,因此可能会有很多问题。
这是正在运行的代码:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Linq;
using System.ServiceProcess;
using System.Text;
using System.Threading.Tasks;
using AudioSwitcher.AudioApi.CoreAudio;
using System.IO.Ports;
using System.Threading;
namespace audio_controller_WS
{
public partial class AudioContorllerWS : ServiceBase
{
static bool _continue;
static SerialPort _serialPort;
public AudioContorllerWS()
{
InitializeComponent();
}
public static void Read()
{
CoreAudioDevice defaultPlaybackDevice = new CoreAudioController().DefaultPlaybackDevice;
while (_continue)
{
try
{
String message = _serialPort.ReadLine();
int convert = int.Parse(message);
defaultPlaybackDevice.Volume = convert;
}
catch (Exception)
{ }
}
}
protected override void OnStart(string[] args)
{
// string message;
StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
Thread readThread = new Thread(Read);
// Create a new SerialPort object with default settings.
_serialPort = new SerialPort();
// Allow the user to set the appropriate properties.
_serialPort.PortName = "COM10";
_serialPort.Baudrate = 9600;
_serialPort.DataBits = 8;
// Set the read/write timeouts
_serialPort.ReadTimeout = 500;
_serialPort.WriteTimeout = 500;
_serialPort.open();
_continue = true;
readThread.Start();
readThread.Join();
_serialPort.Close();
}
protected override void OnContinue()
{
}
protected override void OnStop()
{
}
}
}
我知道我的代码不应在启动时运行,否则我将无法正常工作。
解决方法
您需要退出OnStart方法。试试这个:
public partial class AudioContorllerWS : ServiceBase
{
static bool _continue;
static SerialPort _serialPort;
static Thread readThread;
public AudioContorllerWS()
{
InitializeComponent();
}
public static void Read()
{
CoreAudioDevice defaultPlaybackDevice = new CoreAudioController().DefaultPlaybackDevice;
while (_continue)
{
try
{
String message = _serialPort.ReadLine();
int convert = int.Parse(message);
defaultPlaybackDevice.Volume = convert;
}
catch (Exception)
{ }
}
}
protected override void OnStart(string[] args)
{
// string message;
StringComparer stringComparer = StringComparer.OrdinalIgnoreCase;
readThread = new Thread(Read);
// Create a new SerialPort object with default settings.
_serialPort = new SerialPort();
// Allow the user to set the appropriate properties.
_serialPort.PortName = "COM10";
_serialPort.BaudRate = 9600;
_serialPort.DataBits = 8;
// Set the read/write timeouts
_serialPort.ReadTimeout = 500;
_serialPort.WriteTimeout = 500;
_serialPort.Open();
_continue = true;
readThread.Start();
// don't join
}
protected override void OnContinue()
{
}
protected override void OnStop()
{
_continue = false;
readThread.Join(timeout);
_serialPort.Close();
// abort it if it hasn't exited
}
}