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【CSharp】创建单例winform应用程序

作者:炎锋 / 发布于2016/1/4/ 797


	using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Windows.Forms;
	using System.Threading;
	using System.Reflection;

	 static class Program
	 {
	 private static Mutex singleton;
	 /// <summary>
	 /// The main entry point for the application.
	 /// </summary>
	 [STAThread]
	 static void Main()
	 {
	 Application.EnableVisualStyles();
	 Application.SetCompatibleTextRenderingDefault(false);
	 bool has=Check() ;
	 if (has)
	 {
	 Form form = new Form1();
	 form.FormClosed += new FormClosedEventHandler(form_FormClosed);
	 Application.Run(form);
	 }
	 else {
	 MessageBox.Show("程序已启动");
	
	 }
	 }

	 static void form_FormClosed(object sender, FormClosedEventArgs e)
	 {
	 if (singleton != null) {
	 singleton.Close();
	 }
	 }
	 private static bool Check() {
	 bool has=false;
	 singleton=new Mutex(false,Assembly.GetExecutingAssembly().FullName,out has);
	 // Assembly.GetExecutingAssembly().GetModules()[0].FullyQualifiedName;
	 return has;
	 }
	 }
	}

	

	方法2：

	static class Program
	 {
	 /// <summary>
	 /// 应用程序的主入口点。
	 /// </summary>
	 [STAThread]
	 static void Main()
	 {
	 Process instance = RunningInstance(); //Get the running instance.
	 if (instance == null)
	 {
	 //There isn 't another instance, show our form.
	 Application.EnableVisualStyles();
	 Application.SetCompatibleTextRenderingDefault(false);
	 Application.Run(new MainForm());
	 }
	 else
	 {
	 Message.WriteErrMsg("程序已运行，请勿再次运行!");
	 }
	 }
	 public static Process RunningInstance()
	 {
	 Process current = Process.GetCurrentProcess();
	 Process[] processes = Process.GetProcessesByName(current.ProcessName);
	 //Loop through the running processes in with the same name
	 foreach (Process process in processes)
	 {
	 //忽略当前进程<strong> </strong>
	 if (process.Id != current.Id)
	 {
	 //Make sure that the process is running from the exe file.
	 if (Assembly.GetExecutingAssembly().Location.Replace("/ ", "\\ ") == current.MainModule.FileName)
	 {
	 //Return the other process instance.
	 return process;
	 }
	 }
	 }
	 //No other instance was found, return null.
	 return null;
	 }
	 }

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