只允许启动一个实例,如存在则唤醒前一个实例并置前代码,CSharp代码库,德仔网

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【CSharp】只允许启动一个实例,如存在则唤醒前一个实例并置前

作者:Dezai.CN / 发布于2013/7/16/ 778


	using System;
	using System.Collections.Generic;
	using System.Windows.Forms;
	using System.Diagnostics;//引入Process 类
	using System.Reflection;//引入Assembly
	using System.Runtime.InteropServices; //需要获取句柄，激活前一实例
	using System.Threading;//需要用到mutex
	namespace 银讯通
	{
	 static class Program
	 {
	 /// <summary>
	 /// 应用程序的主入口点。
	 /// </summary>
	 private const int WS_SHOWNORMAL = 1;
	 [DllImport("User32.dll")]
	 private static extern bool ShowWindowAsync(IntPtr hWnd, int cmdShow);
	 [DllImport("User32.dll")]
	 private static extern bool SetForegroundWindow(IntPtr hWnd);
	

	 //[DllImport("User32.dll")]
	 //private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);
	 [STAThread]
	 static void Main()
	 {
	 Process instance = GetRunningInstance();
	 if (instance == null)
	 {
	 Application.EnableVisualStyles();
	 Application.SetCompatibleTextRenderingDefault(false);
	 Application.Run(new Form1());
	 }
	 else
	 {
	 HandleRunningInstance(instance);
	 }
	 }

	 public static Process GetRunningInstance()
	 {
	 Process current = Process.GetCurrentProcess();
	 Process[] processes = Process.GetProcessesByName(current.ProcessName);

	 foreach (Process process in processes)
	 {
	 if (process.Id != current.Id)
	 if (Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
	 return process;
	 }
	 return null;
	 }

	 public static void HandleRunningInstance(Process instance)
	 {

	 ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
	 SetForegroundWindow(instance.MainWindowHandle);
	 }
	 }


	}

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　只允许启动一个实例　

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