asked on

c#.net application + check if already running

I have an application that runs automatically every few mins, sometimes it runs long and a new instance will try to start, how can i check if it is already running and if so just shut down the newest instance that started up leaving the original to still continue

thanks

SOLUTION

Snarf0001

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Russ Suter

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dkilby

ASKER

both these work - thank you - is there code that works best for stopping the instance that just started while leaving the other to still run ?

Russ Suter

It depends entirely on where your code execution is. Assuming this either a Windows Forms application or a console application I would expect your project has a file called Program.cs. In it there is typically a Main() function that looks something like this:

        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new form1());
        }

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You can simply wrap that 3rd line in a conditional statement to make it look like this:

        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Process[] runningProcesses = Process.GetProcessesByName("myApplication");
            if (runningProcesses.Length == 0)
            {
                Application.Run(new form1());
            }
        }

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David Johnson, CD

if you are starting this process using task scheduler then simply check the checkbox to