Checking if application is already running

Checking if application is already running

• chenwen

  Try this...
  
  public static bool IsAppAlreadyRunning()
  {
  Process currentProcess = Process.GetCurrentProcess();
  return Process.GetProcessesByName(currentProcess.Name).Length > 0;
  }
  
  
  you just have to modify it to suit your need.
  
  HTH,
  
  
  

• zeusmt

  Vlad Dogaru wrote:

  how can I pass control to the existing instance

  
  
  You can use Remoting or any of the IPC mechanisms listed here: http://msdn.microsoft.com/library/en-us/ipc/base/interprocess_communications.asp
  
  Take a look at some of these articles, this should covers a lot:
  

  • Introduction to TCP client server in C#
    
  • VB.NET TCP Client - Server Socket Communications
  • Client Server Multithreading Application
  • TinyUDP - Simple UDP Client/Server Components for .NET
  • Building Client/Server applications with VB.NET for secure private file sharing
  • Real Time TCP/IP using C# - The Code Project - C# Programming
  • What is .NET Remoting
  • Remoting events
  • Microsoft .NET Remoting: A Technical Overview

  
  
  
  

• Malleyo

  hi,

  //if it is already running and I right click a file, another instance of the program opens up

  do you have particular extension associated with your application

  unfortunately the only articale that i have about that in vb not C# here its the link

  http://www.vbaccelerator.com/home/VB/Code/Libraries/Shell_Projects/Registering_File_Associations/article.asp

  hope this helps

  
  
  

• skeptic08

  Thanks to everybody who replied. I now have a lot to read, but I'm sure I will find answers there/
  
  

• caius

  Although you can wire it yourself, the Genghis library by Chris Sells and friends includes a class that does multiple instance detection using remoting to pass information between instances. (For instance, opening a document in an already running instance.) Take a look at the Examples\SingleInstance project for an example.
  
  BTW - Genghis is completely free and includes full source code.
  
  
  

• Adamx

  The appplication adds a context menu item for all files (it is a file shredder). I have added an entry in the registry at HKEY_CLASSES_ROOT\*\Shell\Shred\command. The default value in that key is: "Path_to_my_program.exe" "%1". I saw this done in a tutorial somewhere.
  
  I got the part about checking if it's already running, but how about passing control to that instance The program keeps a list of files and when I right-click a file and choose Shred it should be added to that list. Or, if this is way too hard to achieve, at least I should make it so, that if I select, say, 2 files and choose shred, I don't get two apps, each with one file in the list.
  
  Thanks for the link, but my knowledge of VB is null.
  
  

• Thrill5

  shakalama wrote:

  i need this tutorial plz if you don't mind thx

  Take a look at the following article: A simple C# function to add context menu items in Explorer.
  

  
  
  

• ghomf

  You are more then welcome!
  
  Please lett us know whis technique you've picked and if you get everything working correctly.
  
  
  

• craig_munday28

  hi,

  i need this tutorial plz if you don't mind

  thx

  
  
  

• Antoine64

  Well, I saw it a long time ago and didn't save the link. The code was written back then, now I'm just looking to add a finishing touch to it. But I'm sure there is a tutorial about this on MSDN, as well as other sites. Hope you find what you're looking for.
  
  
• Checking if application is already running