Code to detect if an windows application instance is already running or not:
static class Program
{
///
/// The main entry point for the application.
///
[STAThread]
static void Main()
{
if (IsPreviousInstanceRunning)
{
MessageBox.Show("Another instance of this application is already running...", "Application already running", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new frmMain());
}
}
private static bool IsPreviousInstanceRunning
{
get
{
// get the name of our process
string proc = Process.GetCurrentProcess().ProcessName;
// get the list of all processes by that name
Process[] processes = Process.GetProcessesByName(proc);
// if there is more than one process...
if (processes.Length > 1)
return true;
return false;
}
}
}
