利用串口DSR/CTS等端口获取市电状态并实现断电自动关机的C#程序
我有一个UPS，自带的关机软件有点问题，后台有javaw.exe占满一个CPU核心。本来我也懒得弄，这个自带的软件是用网页上的flash作为设置界面，最近不是flash用不了了吗，然后我也懒得再找办法继续运行这个flash，而且它还有占用CPU这个问题，所以就有想法弄一个自动关机的玩意。原计划是用单片机检测的，但是想想看串口那几个没多大用的端口，正好可以用来检测电平，也不知道有没有人像我这么干的，反正能用就好。下面两个是Program.cs和Form1.cs的代码：
Program.cs
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using System; using System.Collections.Generic; using System.Diagnostics; using System.Linq; using System.Threading.Tasks; using System.Windows.Forms; namespace serialguanji { static class Program { /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { //获取当前进程的ID int pId = Process.GetCurrentProcess().Id; bool isRun = false; foreach (Process p in Process.GetProcessesByName(Process.GetCurrentProcess().ProcessName)) { //取得当前程序的进程，进行比较 if (System.Reflection.Assembly.GetExecutingAssembly().Location.ToLower() == p.MainModule.FileName.ToLower()) { if (pId != p.Id) { isRun = true; break; } } } if (isRun == true) { MessageBox.Show("已经有实例在运行"); Application.Exit(); return; } Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); } } } |
Form1.cs
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using System; using System.IO; using System.Text; using System.Threading; using System.Threading.Tasks; using System.Windows.Forms; using System.IO.Ports; using System.Management; using System.Diagnostics; namespace serialguanji { public partial class Form1 : Form { string spx; SerialPort sp; CancellationTokenSource cancelTokenSource; Task task1; public class ErrorLog { public static void ErrorLogTxt(Exception ex) { //获取文件路径（相对于程序的基目录路径） string FilePath = AppDomain.CurrentDomain.BaseDirectory + "/Error.log"; StringBuilder msg = new StringBuilder(); msg.Append("———————————————————— \r\n"); msg.AppendFormat(" 异常发生时间： {0} \r\n", DateTime.Now); msg.AppendFormat(" 异常类型： {0} \r\n", ex.HResult); msg.AppendFormat(" 导致当前异常的 Exception 实例： {0} \r\n", ex.InnerException); msg.AppendFormat(" 导致异常的应用程序或对象的名称： {0} \r\n", ex.Source); msg.AppendFormat(" 引发异常的方法： {0} \r\n", ex.TargetSite); msg.AppendFormat(" 异常堆栈信息： {0} \r\n", ex.StackTrace); msg.AppendFormat(" 异常消息： {0} ", ex.Message); try { using (StreamWriter tw = File.AppendText(FilePath)) { tw.WriteLine(msg.ToString()); } } catch (Exception exx) { MessageBox.Show(exx.Message); } } public static void LogInfo(string sss) { //获取文件路径（相对于程序的基目录路径） string FilePath = AppDomain.CurrentDomain.BaseDirectory + "/Info.log"; StringBuilder msg = new StringBuilder(); msg.AppendFormat("{0} - ", DateTime.Now); msg.Append(sss); try { using (StreamWriter tw = File.AppendText(FilePath)) { tw.WriteLine(msg.ToString()); } } catch (Exception exx) { MessageBox.Show(exx.Message); } } } public Form1() { InitializeComponent(); } private void Form1_Shown(object sender, EventArgs e) { var search = new ManagementObjectSearcher(@"SELECT * FROM Win32_PnPEntity WHERE Name LIKE '%(COM%'"); ErrorLog.LogInfo("程序已启动"); comboBox1.Items.Clear(); foreach (ManagementObject mo1 in search.Get()) { comboBox1.Items.Add(mo1["Name"].ToString() + Environment.NewLine); if ((mo1["Name"].ToString().Contains("CH340")) || (mo1["Name"].ToString().Contains("PL2303"))) { spx = mo1["Name"].ToString() + Environment.NewLine; } } if (spx == null) { ErrorLog.LogInfo("找不到串口CH340"); MessageBox.Show("找不到串口CH340！请确认是否已连接模块。"); } else comboBox1.SelectedIndex = comboBox1.Items.IndexOf(spx); } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { if (task1 != null && (task1.Status == TaskStatus.Running || task1.Status == TaskStatus.WaitingToRun || task1.Status == TaskStatus.WaitingForActivation)) { cancelTokenSource.Cancel(); cancelTokenSource.Dispose(); } try { if (sp != null && sp.IsOpen == true) sp.Close(); sp = new SerialPort(comboBox1.Text.Substring(comboBox1.Text.IndexOf("(") + 1, comboBox1.Text.Length - comboBox1.Text.IndexOf("(") - 4)); sp.Open(); Application.DoEvents(); cancelTokenSource = new CancellationTokenSource(); task1 = Task.Factory.StartNew(DoWork, cancelTokenSource.Token); this.WindowState = FormWindowState.Minimized; this.ShowInTaskbar = false; this.Hide(); ErrorLog.LogInfo("程序已正常工作"); } catch (Exception ex) { MessageBox.Show(ex.Message); ErrorLog.ErrorLogTxt(ex); } } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { if (task1 != null && (task1.Status == TaskStatus.Running || task1.Status == TaskStatus.WaitingToRun || task1.Status == TaskStatus.WaitingForActivation)) { cancelTokenSource.Cancel(); cancelTokenSource.Dispose(); } if (sp != null && sp.IsOpen == true) sp.Close(); ErrorLog.LogInfo("程序退出"); } private void DoWork(object arg) { int mmm = 0, nnn = 0; while (!cancelTokenSource.IsCancellationRequested) // Worker thread loop { //if (sp.CtsHolding == false) if (sp.DsrHolding == false) mmm++; else if (nnn == 1) { mmm = 0; nnn = 0; ErrorLog.LogInfo("取消关机"); Process.Start("c:/windows/system32/shutdown.exe", "-a"); Process.Start("c:/windows/system32/shutdown.exe", "-a -m 192.168.86.13"); } if (nnn == 0 && mmm > 10) { ErrorLog.LogInfo("关机"); Process.Start("c:/windows/system32/shutdown.exe", "-s -t 20"); Process.Start("c:/windows/system32/shutdown.exe", "-s -m 192.168.86.13 -t 20"); nnn = 1; } Thread.Sleep(1000); } } private void Form1_Deactivate(object sender, EventArgs e) { if (this.WindowState == FormWindowState.Minimized) { this.ShowInTaskbar = false; this.Hide(); } } private void notifyIcon1_DoubleClick(object sender, EventArgs e) { if (this.WindowState == FormWindowState.Minimized) { this.Show(); this.ShowInTaskbar = true; this.WindowState = FormWindowState.Normal; } } private void 显示界面ToolStripMenuItem_Click(object sender, EventArgs e) { this.Show(); this.ShowInTaskbar = true; this.WindowState = FormWindowState.Normal; } private void 隐藏界面ToolStripMenuItem_Click(object sender, EventArgs e) { this.WindowState = FormWindowState.Minimized; this.ShowInTaskbar = false; this.Hide(); } private void 退出ToolStripMenuItem_Click(object sender, EventArgs e) { this.Close(); } private void button1_Click(object sender, EventArgs e) { ErrorLog.LogInfo("手动取消关机"); Process.Start("c:/windows/system32/shutdown.exe", "-a"); Process.Start("c:/windows/system32/shutdown.exe", "-a -m 192.168.86.13"); } } } |