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  • 通过Process使应用程序在一台电脑上只能有一个在运行

    废话少说直接上代码了:

    #region 只允许一台主机上运行一个应用程序
            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);
    
            /// <summary>
            /// 获取当前是否具有相同进程。
            /// </summary>
            /// <returns></returns>
            public static Process GetRunningInstance()
            {
                Process current = Process.GetCurrentProcess();
                Process[] processes = Process.GetProcessesByName(current.ProcessName);
                //遍历正在有相同名字运行的例程   
                foreach (Process process in processes)
                {
                    //忽略现有的例程   
                    if (process.Id != current.Id)
                        //确保例程从EXE文件运行 
                        if (System.Reflection.Assembly.GetExecutingAssembly().Location.Replace("/", "\\") == current.MainModule.FileName)
                            return process;
                }
                return null;
            }
            /// <summary>
            /// 激活原有的进程。
            /// </summary>
            /// <param name="instance"></param>
            public static void HandleRunningInstance(Process instance)
            {
                ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL);
                SetForegroundWindow(instance.MainWindowHandle);
            }
            #endregion*/
    
    使用方法如下:
             
             
     /// <summary>
            /// 应用程序的主入口点。
            /// </summary>
            [STAThread]
            static void Main()
            {
                //Process instance = GetRunningInstance();
                //if (instance == null)
                //{
                            Application.EnableVisualStyles();
                    Application.SetCompatibleTextRenderingDefault(false);
                     Application.Run(new MainForm());
                   }//else {
                //    SMSMsgBox.ShowMessage(" 您的程序已经在运行了!!");
                //}
                 
    
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  • 原文地址:https://www.cnblogs.com/yanghucheng/p/2796320.html
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