Single Instance

[Pepi Tonas]

Hi there,

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?

Thanx....

[CJ Taylor]

Get a list of processes from System.Diagnostics.Process and see if the app
is running.

-CJ
"Pepi Tonas" <Pe*******@hotmail.com> wrote in message
news:d5********************************@4ax.com...

Hi there,

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?

Thanx....

[Jan Tielens]

Or you can use a mutex:
http://www.codeproject.com/vb/net/sing_inistan.asp

--
Greetz,
Jan
__________________________________
Read my weblog: http://weblogs.asp.net/jan
"Pepi Tonas" <Pe*******@hotmail.com> schreef in bericht
news:d5********************************@4ax.com...

Hi there,

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?

Thanx....

[Herfried K. Wagner [MVP]]

* Pepi Tonas <Pe*******@hotmail.com> scripsit:

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?

Nice solution by Tom Shelton:

<http://groups.google.com/groups?selm=eJCwBK%23PDHA.1608%40TK2MSFTNGP11.phx. gbl>

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

[Jim Hughes]

Every time I see this question, I think to myself... What if the application
is running under Terminal Server AND you want it to be once per Logged In
User session instead of once per machine...

What is the best way to do this?

"Herfried K. Wagner [MVP]" <hi***************@gmx.at> wrote in message
news:eF****************@TK2MSFTNGP12.phx.gbl...

* Pepi Tonas <Pe*******@hotmail.com> scripsit:

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?
Nice solution by Tom Shelton:

<http://groups.google.com/groups?selm...2MSFTNGP11.phx.
gbl>
--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>

[Joe \Nuke Me Xemu\ Foster]

"Jim Hughes" <NO*********@HotMail.com> wrote in message <news:e1**************@tk2msftngp13.phx.gbl>...

Every time I see this question, I think to myself... What if the application
is running under Terminal Server AND you want it to be once per Logged In
User session instead of once per machine...

What is the best way to do this?

If it's easy to fetch the user's SID or domain and username, make
those part of the mutex name? What would be nice is if the same
set of techniques could be used to deal with both Terminal Server
and XP's fast user-switching, since the issues are similar. =)

--
Joe Foster <mailto:jlfoster%40znet.com> Sacrament R2-45 <http://www.xenu.net/>
WARNING: I cannot be held responsible for the above They're coming to
because my cats have apparently learned to type. take me away, ha ha!

[Jim Hughes]

Thanks for the reply - good ideas!

I thought about the XP - Fast User question right after I posted, but I'm
almost always in domain environments and not workgroups.

I also found this article after posting - while not specific to my question
it added relevant info to the subject!

http://www.codeproject.com/vb/net/sing_inistan.asp

"Joe "Nuke Me Xemu" Foster" <jo*@bftsi0.UUCP> wrote in message
news:eh**************@TK2MSFTNGP10.phx.gbl...

"Jim Hughes" <NO*********@HotMail.com> wrote in message <news:e1**************@tk2msftngp13.phx.gbl>...

Every time I see this question, I think to myself... What if the application is running under Terminal Server AND you want it to be once per Logged In User session instead of once per machine...

What is the best way to do this?
If it's easy to fetch the user's SID or domain and username, make
those part of the mutex name? What would be nice is if the same
set of techniques could be used to deal with both Terminal Server
and XP's fast user-switching, since the issues are similar. =)

--
Joe Foster <mailto:jlfoster%40znet.com> Sacrament R2-45

<http://www.xenu.net/> WARNING: I cannot be held responsible for the above They're coming to because my cats have apparently learned to type. take me away, ha ha!

[Bob Powell [MVP]]

http://www.bobpowell.net/singleinstance.htm

--
Bob Powell

Get a free issue of Well Formed VB edition.
http://www.bobpowell.net/vb_offer.htm

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http://www.bobpowell.net/currentissue.htm

Visit the GDI+ FAQ for articles, tips, tricks and code.
http://www.bobpowell.net/gdiplus_faq.htm

Read my blog
http://bobpowelldotnet.blogspot.com


"Pepi Tonas" <Pe*******@hotmail.com> wrote in message
news:d5********************************@4ax.com...

Hi there,

I am looking for a way to prevent my application from starting again
if it is already running. Is there a way I can ask Windows if it is?

Thanx....

[Herfried K. Wagner [MVP]]

* "Bob Powell [MVP]" <bob@_spamkiller_bobpowell.net> scripsit:

http://www.bobpowell.net/singleinstance.htm

Basically that will work, but if your application has a "common" name
like "Calculator", it may not work if an other application with the same
name (which is not an instance of your application) is running.

Just a thought...

--
Herfried K. Wagner [MVP]
<http://www.mvps.org/dotnet>