Single instance application solution

Question

I have just finnished my solution to how to make WPF windows application single instance only.

It uses SingleInstanceApplicationHelper class which is commented so have a look at the code.

Download from http://vzestup.net/temp/SingleInstanceApplicationHelper.rar.

Just a note:

When WPF single instance application runs for the first time or next instance is launched, OnStartup of your Application derived class is called so you can listen to Startup event and get the command line arguments - more details are in the code.

Answer 1

Marek-

Thanks for sharing your solutions to missing features in WPF!

 

It would be great to understand how this compares with the sample in the sdk and other solutions.

Please see this post.

 

Thanks, Rob Relyea

Program Manager, WPF Team

http://rrelyea.spaces.live.com

Answer 2

Rob,

  my solution uses ideas from SingleInstanceDetectionSample SDK sample, but You do not need to derive your special Window class and Application.OnStartup is called when next instance is launched - I use it in my MDI documents management (to be shared soon) to open documents specified on command line of first/next application instance.

 

Marek

Answer 3

Marek-

Thanks for describing the sample.  Can you please make it available as a .zip as well, somebody gave feedback on my blog...

Thanks, Rob

Answer 4

Here is the .zip and .rar is removed:

http://vzestup.net/temp/SingleInstanceApplicationHelper.zip.

 

Answer 5

Code Block

Process thisProcess = Process.GetCurrentProcess();

foreach (Process p in Process.GetProcessesByName(thisProcess.ProcessName))

{

if (p.Id != thisProcess.Id)

{

// Shut Down

MessageBox.Show("Another instance is already running.");

Application.Current.Shutdown();

return;

}

}

 

 

 

Answer 6

Also found this: http://blogs.microsoft.co.il/blogs/maxim/archive/2010/02/13/single-instance-application-manager.aspx

Answer 7

vb.net solution:

(Put this in the application's new decleration)

if Process.GetProcessesByName(Application.ResourceAssembly.GetName.Name).Length > 1 Then Application.Current.Shutdown() 

 

Rob Latour www.callclerk.com

 

 

Answer 8

The solution olso work in WPF :) It's as easy as possible! Thanks!

if (Process.GetProcessesByName(System.Windows.Application.ResourceAssembly.GetName().Name).Length > 1)
        {
          MessageBox.Show("Max 1 instance of program. Sorry.");
          System.Windows.Application.Current.Shutdown();
        }

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Poland Country Not all gold that compiles :)