single application instance

[Guest]

Hi,

I've read several threads about 1 single instance of application and I tried
them but without sucess.
Does anyone have a good example for making the main Form as single instance
application ?

thanks a lot,
PM

 

[Sakharam Phapale]

Hi Maileen,

Try this one.

Public Sub Main()
Dim intAppInstances As Integer
intAppInstances = UBound(Diagnostics.Process.GetProcessesByName
(Diagnostics.Process.GetCurrentProcess.ProcessName))
If intAppInstances > 0 Then
MsgBox("Only one instance can be run at a time.")
Exit Sub
End If
End Sub

Regards
Sakharam Phapale

 

[C-Services Holland b.v.]

Hi Maileen,

Try this one.

Public Sub Main()
Dim intAppInstances As Integer
intAppInstances = UBound(Diagnostics.Process.GetProcessesByName
(Diagnostics.Process.GetCurrentProcess.ProcessName))
If intAppInstances > 0 Then
MsgBox("Only one instance can be run at a time.")
Exit Sub
End If
End Sub

Regards
Sakharam Phapale

Shouldn't
If intAppInstances > 0 Then
be
If intAppInstances > 1 Then

Otherwise you can't even run it once since the program checking it is
itself one of the instances.

 

[Cor Ligthert]

Maileen,

http://dotnet.mvps.org/dotnet/code/application/

And than
Nur eine Instanz der Anwendung zulassen
And than again the solution from Tom Shelton (in English) in the bottom of
that

I hope this helps?

Cor

 

[Herfried K. Wagner [MVP]]

Try this one.

Public Sub Main()
Dim intAppInstances As Integer
intAppInstances = UBound(Diagnostics.Process.GetProcessesByName
(Diagnostics.Process.GetCurrentProcess.ProcessName))
If intAppInstances > 0 Then

The process name is not necessarily unique.

 

[Herfried K. Wagner [MVP]]

Does anyone have a good example for making the main Form as single
instance
application ?

How do I make sure that only one instance of my application runs at a time?
<URL:http://www.yoda.arachsys.com/csharp/faq/#one.application.instance>

 

[Maileen]

thanks a lot,
I just change it a little bit in order to make it more suitable.
but it helped me a lot.

 

[Cor Ligthert]

Maileen,

Why I point you on the method from Tom is that that prevents that programs
which have the same names as yours are not blocked.

Otherwise is this more than enough
\\\
Private mut As New Threading.Mutex(True, "myProgram", mutCreated)
Private Sub Form1_Load(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles MyBase.Load
If Not mutCreated Then Me.Close()
////

I hope this gives more ideas

Cor