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New Message on BDOTNET
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From: Vinu Desai
Message 4 in Discussion
Hi,
Easier way
of doing this would be to use
if(System.Diagnostics.Process.GetProcessesByName("").Length>1)
{
System.Diagnostics.Process.GetCurrentProcess().Kill();
}
Regards
Vinay
-----Original Message-----
From: BDOTNET
[mailto:[EMAIL PROTECTED]
Sent: Friday, October 31, 2003 9:09
AM
To: [EMAIL PROTECTED]
Subject: Re: How to restrict
a C# EXE to only one instance ?
New Message on BDOTNET
How to
restrict a C# EXE to only one instance ?
Reply
Recommend
Message 3 in
Discussion
From: saileshsaha
Hi Mr
BabuRaj,
The following code shows how to
make sure that there is only one instance of your Windows Forms
application running. The code first searches for processes with
the same name as the and if one is found it makes sure that was
ran from the same location. If it decides that there is another
instance running, it shows that main window of the other
instance, otherwise it runs another instance of the main
form.
using System;
using
System.Runtime.InteropServices;
using
System.Windows.Forms;
using System.Diagnostics;
using
System.Reflection;
public class
OneInstnace
{
[STAThread]
public static void
Main()
{
//Get the running
instance.
Process instance =
RunningInstance();
if (instance ==
null)
{
//There isn't another instance, show
our form.
Application.Run (new
Form());
}
else
{
//There is
another instance of this
process.
HandleRunningInstance(instance);
}
}
public
static Process RunningInstance()
{
Process
current = Process.GetCurrentProcess();
Process[]
processes = Process.GetProcessesByName
(current.ProcessName);
//Loop through the running processes in
with the same name
foreach (Process process in
processes)
{
//Ignore the current
process
if (process.Id !=
current.Id)
{
//Make sure that the process is
running from the exe file.
if
(Assembly.GetExecutingAssembly().Location.Replace("/", "\\")
==
current.MainModule.FileName)
{
//Return
the other process instance.
return
process;
}
}
}
//No other instance was found, return
null.
return null;
}
public static void
HandleRunningInstance(Process
instance)
{
//Make sure the window is not
minimized or maximized
ShowWindowAsync
(instance.MainWindowHandle , WS_SHOWNORMAL);
//Set the real intance to foreground
window
SetForegroundWindow
(instance.MainWindowHandle);
}
[DllImport("User32.dll")]
private static extern bool
ShowWindowAsync(
IntPtr hWnd, int
cmdShow);
[DllImport("User32.dll")] private static
extern bool
SetForegroundWindow(IntPtr
hWnd);
private const int WS_SHOWNORMAL =
1;
}
Thanks and Regards,
Sailesh
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