Running only 1 application instance in a machine

[anonieko]

Avoid running several simultaneous instances of the same application on
a single machine. ( Checking if application is already running)

(Book Excerpt Practical C#2)

Thanks to the static methods named GetCurrentProcess() (which returns
the current
process) and GetProcesses() (which returns all the processes on the
machine) of the System.
Diagnostics.Process class, this problem finds an elegant and easy to
implement solution using
the following program:
using System.Diagnostics;

static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
if (TestIfAlreadyRunning())
{
MessageBox.Show("Application is already running");
}
else
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(fals e);
Application.Run(new Form1());
}
}

static bool TestIfAlreadyRunning()
{
Process currentProcess = Process.GetCurrentProcess();
Process[] processes = Process.GetProcesses();
foreach (Process process in processes)
{
if (process.Id != currentProcess.Id)
if (process.ProcessName ==
currentProcess.ProcessName)
return true;
}
return false;
}
}
The GetProcesses() method can also return all the processes on a remote
machine by indicating the name of the machine as a parameter to the
method.

[Michael Nemtsev]

And what if user decided to rename app to call one more instance? :)
Why not to use Global mutext.

--
Michael Nemtsev :: blog: http://spaces.msn.com/laflour

"At times one remains faithful to a cause only because its opponents do
not cease to be insipid." (c) Friedrich Nietzsche

[Ignacio Machin \( .NET/ C# MVP \)]

Him

take a look at
http://www.yoda.arachsys.com/csharp/...ation.instance
--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation
<an******@hotmail.com> wrote in message
news:11**********************@i39g2000cwa.googlegr oups.com...

Avoid running several simultaneous instances of the same application on
a single machine. ( Checking if application is already running)

(Book Excerpt Practical C#2)

Thanks to the static methods named GetCurrentProcess() (which returns
the current
process) and GetProcesses() (which returns all the processes on the
machine) of the System.
Diagnostics.Process class, this problem finds an elegant and easy to
implement solution using
the following program:
using System.Diagnostics;

static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
if (TestIfAlreadyRunning())
{
MessageBox.Show("Application is already running");
}
else
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(fals e);
Application.Run(new Form1());
}
}

static bool TestIfAlreadyRunning()
{
Process currentProcess = Process.GetCurrentProcess();
Process[] processes = Process.GetProcesses();
foreach (Process process in processes)
{
if (process.Id != currentProcess.Id)
if (process.ProcessName ==
currentProcess.ProcessName)
return true;
}
return false;
}
}
The GetProcesses() method can also return all the processes on a remote
machine by indicating the name of the machine as a parameter to the
method.