哪些企业需要网站建设的,门户网站建设技术方案,wordpress主题首页主体,织梦门户网站做大后使用用互斥量(System.Threading.Mutex)#xff1a; 同步基元#xff0c;它只向一个线程授予对共享资源的独占访问权。在程序启动时候#xff0c;请求一个互斥体#xff0c;如果能获取对指定互斥的访问权#xff0c;就职运行一个实例。
实例代码#xff1a; /// …使用用互斥量(System.Threading.Mutex) 同步基元它只向一个线程授予对共享资源的独占访问权。在程序启动时候请求一个互斥体如果能获取对指定互斥的访问权就职运行一个实例。
实例代码 /// summary/// App.xaml 的交互逻辑/// /summarypublic partial class App : Application{[DllImport(user32.dll )]//设置窗体置顶private static extern bool SetForegroundWindow(IntPtr hWnd);[DllImport(User32.dll)]public static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);private static Mutex _m null;private static string currentProcess System.Reflection.Assembly.GetExecutingAssembly().GetName().Name;/// summary/// 只允许运行一个实例/// /summary/// param namemutexName/param/// returnstrue:已经存在实例 false:不存在实例/returnspublic static bool CheckRunOneInstance(string mutexName null){bool result false;bool mutexWasCreated false;try{bool requestInitialOwnership true;if (mutexName null)mutexName currentProcess;_m new Mutex(requestInitialOwnership, mutexName, out mutexWasCreated);if (!mutexWasCreated){result true;}}catch (Exception ex){MessageBox.Show(ex.Message);}return result;}/// summary/// 有程序运行设置焦点/// /summaryprivate void Focus(){foreach (Process process in Process.GetProcesses()){try{if (process.ProcessName.ToLower() ! currentProcess.ToLower())continue;IntPtr hwnd process.MainWindowHandle;if (hwnd ! IntPtr.Zero){SetForegroundWindow(hwnd);ShowWindow(hwnd, 2);}}catch (Exception ex){MessageBox.Show(ex.Message);}}}private void Application_Startup(object sender, StartupEventArgs e){if(CheckRunOneInstance()){Focus();System.Windows.Application.Current.Shutdown();return;}else{new MainWindow().Show();}}}
实例链接
https://download.csdn.net/download/lvxingzhe3/88668552
