Passing arguments to application

Question

This question might seem a bit vague but here we go.

I am preventing multiple instances of my wpf application, like so:

Process proc = Process.GetCurrentProcess();
if (Process.GetProcessesByName(proc.ProcessName).Length > 1)
{
    Application.Current.Shutdown();
    return;
}

if (e.Args != null && e.Args.Count() > 0)
{
    this.Properties["Magnet"] = e.Args;
}

Is it possible to pass the command-line arguments to the application already running?

Answer 1

No, it is not possible. You should use some of inter process communication techniques.

Answer 2

For anyone interested in, I decided to use this code in my App.Xaml.cs:

[STAThread]
public static void Main()
{
    if (SingleInstance<App>.InitializeAsFirstInstance(UNIQUE))
    {
        var application = new App();
        application.InitializeComponent();
        application.Run();
        SingleInstance<App>.Cleanup();
    }
}

public bool SignalExternalCommandLineArgs(IList<string> args)
{
    // Use arguments
    return true;
}

UNIQUE is a constant string of 20 characters.

SingleInstance<App>.Cleanup() derives from ISingleInstanceApp which is defined in SingleInstance.cs and I also implemented ISingleInstanceApp in my application class.

Thanks for all the help!