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procedure for calling an exe only one time

Answer 1

A:

this should get you off on the right foot: http://www.webdevbros.net/2007/11/14/singelton-application-with-c/

Joel 2010-02-02 06:13:26

thanks for ur answer

zoya 2010-02-02 06:17:02

is the code to be run on the button click event??

zoya 2010-02-02 06:27:30

this is giving an error on IsFirstInstance() cannot declare an instace members on static class

zoya 2010-02-02 06:32:50

It's a typeo. You have to make that method static: public static bool IsFirstInstance()

Joel 2010-02-03 03:16:22

is there the other alternative to solve this problem?? i have gone through the code mutex.. is this the better option??if yes then how to use it on the button click event??

zoya 2010-02-03 05:59:24

there is another error which im not able to resolve that is system.reflection.assembly does not contain a defination of GetEntyAssembly();

zoya 2010-02-03 06:24:23

figure out where your bugs are. Besides the static problem, I was able to create an application that only allowed for one instance of it being open. Or maybe you should be a little more clear as to what you're trying to do... are the exe's you're launching apps you made? or are they other random applications?

Joel 2010-02-03 21:36:29

the exe im launching is the third-party exe basically its another program to be made to run in my program.. the pbm im facing is that it is running the exe one time but its on focusing on that exe. im able to see my exe only when i close my form..

zoya 2010-02-04 05:05:17

Answer 2

+1 A:

Process.Start() returns a Process object. What you could do is have a class variable (for example Process startedProcess;) that is initialized when the button is clicked. If that variable is null that means the process hasn't started yet, and that application should be launched, otherwise it's already running, and we should ignore it.

Here is a basic example:

Process startedProcess = null;

public void button1_Clicked(object sender, EventArgs e)
{

     if ( startedProcess == null )
          startedProcess = Process.Start("path\\to\\process.exe");

}

If you are looking to automatically switch to that window in the case that the application is already running, .NET does not have any built in methods to do this natively. You will need to to DLLImports from user32.dll. An example can be found in the comments on this page : http://www.eggheadcafe.com/community/aspnet/14/21984/switch-to-another-runnin.aspx

Daniel Joseph 2010-02-06 21:31:46

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procedure for calling an exe only one time

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