Question

Alright so here is the deal. I am trying to make a application that’s a GUI application yet has no GUI. So when the application starts, it has a small form with a login screen (I have done this part).

This the code for the main() in which the form runs but as soon as it is closed, I dispose of it.

static void Main()  {            Application.EnableVisualStyles();     Application.SetCompatibleTextRenderingDefault(false);                             //Create an instance of form1     Form1 form1 = new Form1();               Application.Run(form1);      if(form1.isLoggedIn)      {                      filename = Path.Combine(Environment.GetFolderPath(System.Environment.SpecialFolder.CommonApplicationData), DateTime.Now.ToString('ddMMyyhhmm') + '-' + form1.username);         Flow palm = new Flow(new FlowArguments(form1.username, filename));         MessageBox.Show('Thankyou, exiting...');         form1.Dispose();                     }  } 

So as you can see after the form is closed, the main continues on the condition if someone is logged in. If you look carefully, there’s a instance to the Flow class that’s created.

This is a very short class and here we go:

public class Flow  {     //global variables     FlowArguments FlowArgs;     System.Threading.Timer tm;      //constructor     public Flow(FlowArguments fmg)      {         FlowArgs = fmg;          tm = new System.Threading.Timer(Tick, null,                                              System.Threading.Timeout.Infinite, 10000);           using(StreamWriter sw = new StreamWriter(FlowArgs.Filename))          {                         //sw.writelines that SO doesnt really care for.                        }          //enable the timer         tm.Change(0, 100);     }      public void Tick(object State)      {         Console.WriteLine('Hello');         //a bunch of SteamWriter writeline methods that SO doesnt care for.     }      public void WriteProcesses(StreamWriter sw, DateTime dw)      {         var localAll = Process.GetProcesses().Where(o => o.ProcessName.ToLower() != 'svchost');         foreach(Process p in localAll)          {             sw.WriteLine('@' + p.ProcessName +                          '[' + dw.ToString('ddMMyyhhmm') + ']' +                          '[' + FlowArgs.Username + ']');         }                   } } 

As you can see I do start the timer. But since this uses System.Threading.Timer (because I read somewhere that the Form.Timer really isn’t appropriate) it runs on a threadpool (as per MSDN) but while this is happening the main form has now exited out of Main() and hence the program is closed.

What are my possible solutions? This timer will run every 10 minutes (grabbing the processes). After the GUI is closed, I plan on making a system icon tray that the user can use to close the program.

Answer 1

If you want to make the foreground thread wait you can use a WaitHandle.

http://msdn.microsoft.com/en-us/library/system.threading.waithandle.aspx