How can I check if my application is already running? 1

[ddvlad]

I don't want users to be able to run an application more than once at the same time. How can I check if the app is already running?
Thanks in advance.

Life is a bad joke -- don't take it serious...

 

[palbano]

Use a named mutex

System.Threading.Mutex

-pete

 

[FoxyBOA]

Hi !

if (System.Diagnostics.Process.GetProcessesByName(System.Diagnostics.Process.GetCurrentProcess().ProcessName).Length > 0)
{
	this.Close();
}

 

[ddvlad]

Thanks a lot to both of you!

Life is a bad joke -- don't take it serious...

 

[palbano]

So if you put that code in the OnLoad() override of the main Form the first instance will close. If you change the test to be greater than 1 it will work. However if a user copies the .exe file to a different name then they can create an instance for each copy of the file they create.

Using a Mutex eliminates both of those limitations.


-pete