Multiple Copy Problem

[Steve]

How do you get c# to only allow one copy of a program to be running?

ie. if a user trys to run a program that is already running the program will
just restore its original size rather than starting a new one


cheers in advance

Steve

 

[Cathal Connolly [VB MVP]]

Try http://www.syncfusion.com/faq/winforms/search/550.asp . Please note if
your application is running in a partial trust enviroment, you may have some
issues with this code, so be sure to test.

Cathal

 

[Bob Powell [MVP]]

Windows Forms Tips and Tricks.

--
Bob Powell [MVP]
Visual C#, System.Drawing

Ramuseco Limited .NET consulting
http://www.ramuseco.com

Find great Windows Forms articles in Windows Forms Tips and Tricks
http://www.bobpowell.net/tipstricks.htm

Answer those GDI+ questions with the GDI+ FAQ
http://www.bobpowell.net/faqmain.htm

All new articles provide code in C# and VB.NET.
Subscribe to the RSS feeds provided and never miss a new article.

 

[Jon Skeet [C# MVP]]

Try http://www.syncfusion.com/faq/winforms/search/550.asp . Please note if
your application is running in a partial trust enviroment, you may have some
issues with this code, so be sure to test.

That's not a good way of doing it, IMO:

1) It relies on the program only being in one place
2) It has a race condition (two processes could be launched at the same
time, both notice that the other one exists, and both quit)

A better solution is to use a Mutex. See
http://www.pobox.com/~skeet/csharp/faq/#one.application.instance