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Check for Single-Instance

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vckicks vckicks is offline Offline Aug 25th, 2008, 2:26 am |
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A simple way to check if the current C# program is the only instance of itself running.
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Code Snippet
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C# Syntax
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  1. private bool IsSingleInstance()
  2. {
  3.      foreach (Process process in Process.GetProcesses())
  4.      {
  5.           if (process.MainWindowTitle == this.Text)
  6.                return false;
  7.      }
  8.      return true;
  9. }
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ashishkumar008 ashishkumar008 is offline Offline | 29 Days Ago
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this give error....
In foreach line (in process)
always mention namespace which is required and that place where code to be paste
 
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gusano79 gusano79 is offline Offline | 29 Days Ago
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Simple, yes... but not something I'd allow into production code. See these links for some discussion.

Here's an alternative... first, a method to try to create a mutex unique to the application:

C# Syntax (Toggle Plain Text) 
  1. private Mutex GetSingleInstanceMutex()
  2. {
  3.     bool createdNewMutex;
  4.  
  5.     Mutex mutex = new Mutex(false, @"Global\" + SomethingUnique, out createdNewMutex);
  6.  
  7.     if (!createdNewMutex)
  8.     {
  9.         mutex = null;
  10.     }
  11.  
  12.     return mutex;
  13. }

SomethingUnique should be something unique to the application, for example, the assembly GUID.

Here's how you'd use the method:

C# Syntax (Toggle Plain Text) 
  1. using (Mutex mutex = GetSingleInstanceMutex())
  2. {
  3.     if (mutex != null)
  4.     {
  5.         // This is the only running instance; go ahead and run the application.
  6.     }
  7.     else
  8.     {
  9.         // Another instance is running; notify user and quit.
  10.     }
  11. }
 
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ashishkumar008 ashishkumar008 is offline Offline | 28 Days Ago
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Request:-
i want to use flash file in webbrowser like other resources like picture
i do not want to use full path (c:\programfile\).
can u post full c# code
please
 
 

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