C#编程中设置程序只可被运行一次的方法

[STAThread] static void Main()

{ Application.EnableVisualStyles();

Application.SetCompatibleTextRenderingDefault(false); Process instance = RunningInstance();

if (instance == null) {

Form1 frm = new Form1(); Application.Run(new Form1());

} else

{ HandleRunningInstance(instance);

}

} /// <summary>

/// 获取正在运行的实例，没有运行的实例返回null; /// </summary>

public static Process RunningInstance() {

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; }

/// <summary>

/// 显示已运行的程序。 /// </summary>

public static void HandleRunningInstance(Process instance) {

ShowWindowAsync(instance.MainWindowHandle, WS_SHOWNORMAL); //显示，可以注释掉 SetForegroundWindow(instance.MainWindowHandle); //放到前端

} }