Dear All,

I m working with an C# application. My application is working properly but if I open another instance of exe (by clicking shortcut on desktop icon) It creates problem.

I want to know how to prevent another instance of exe file or how to check the status of exe file in C#?

Thank you,

With Regards

Niraj Shah

---

New to Smart Device

Google for:

A very good option for this scenario is to use a Mutex .  You can use a mutex to prevent a second copy of your application from running.  Joel Bennett posted some sample code on his blog .

The nice thing about using a mutex is that it's:

• Reliable
• Easy to notify the user - you can allow your application to run enough to tell the user "this is already running", and even activate the other copy, if you so choose.
• Easy to implement

---

Reed Copsey, Jr. - http://reedcopsey.com

A quick search turned this up.  Untested.

Be sure to add a reference to Microsoft.VisualBasic.dll, and a using statement.


/******************************************/

static class Program
{
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        SingleInstanceApplication.Run(new Form1(),
            StartupNextInstanceHandler);
    }

    static void StartupNextInstanceHandler(
        object sender, StartupNextInstanceEventArgs e)
    {
        // do whatever you want here with e.CommandLine...
    }
}

/*******************************************/

public class SingleInstanceApplication : WindowsFormsApplicationBase
{
    private SingleInstanceApplication()
    {
        base.IsSingleInstance = true;
    }
   
    public static void Run(Form f,
        StartupNextInstanceEventHandler startupHandler)
    {
        SingleInstanceApplication app = new SingleInstanceApplication();
        app.MainForm = f;
        app.StartupNextInstance += startupHandler;
        app.Run(Environment.GetCommandLineArgs());
    }
}

/********************************************/

---

Mark the best replies as answers. "Fooling computers since 1971."

Google for:

A very good option for this scenario is to use a Mutex .  You can use a mutex to prevent a second copy of your application from running.  Joel Bennett posted some sample code on his blog .

The nice thing about using a mutex is that it's:

• Reliable
• Easy to notify the user - you can allow your application to run enough to tell the user "this is already running", and even activate the other copy, if you so choose.
• Easy to implement

---

Reed Copsey, Jr. - http://reedcopsey.com

A quick search turned this up.  Untested.

Be sure to add a reference to Microsoft.VisualBasic.dll, and a using statement.


/******************************************/

static class Program
{
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        SingleInstanceApplication.Run(new Form1(),
            StartupNextInstanceHandler);
    }

    static void StartupNextInstanceHandler(
        object sender, StartupNextInstanceEventArgs e)
    {
        // do whatever you want here with e.CommandLine...
    }
}

/*******************************************/

public class SingleInstanceApplication : WindowsFormsApplicationBase
{
    private SingleInstanceApplication()
    {
        base.IsSingleInstance = true;
    }
   
    public static void Run(Form f,
        StartupNextInstanceEventHandler startupHandler)
    {
        SingleInstanceApplication app = new SingleInstanceApplication();
        app.MainForm = f;
        app.StartupNextInstance += startupHandler;
        app.Run(Environment.GetCommandLineArgs());
    }
}

/********************************************/

---

Mark the best replies as answers. "Fooling computers since 1971."