I have to run a thread create in the code. In the form1 i have a button that run the new separate thread for elaborate some data, so i need it for not freeze the form.
I have inizialized thread:
dim th as thread = new thread (addressof elaborate)
And at the button.click event:
th.isbackground= true
th.start()
Now, at the form load i have iconized my program, but when i start new thread the tray icon is duplicated from it. I want to resolve that when start new thread it's not show new notifyicon.
Any ideas?
(i don't have found anything online, only Multiple notification icons appear when using multithreading)
Create a class called Elab inside that class, put a sub called work Add a timer to your form that is disabled
with a tickcount of say 1000
Declare this in your form class:
Dim El as Elab
inside Form_Load() put:
El = New Elab()
Under your button, put this:
Dim gThread as new System.Threading.Thread(Address of El.Work)
Timer1.Enabled = True
Inside Elab declare a variable called Result:
Public Result as boolean
When elab has finished whatever it is doing, set result as true, and store the results in public variables you can access later.
Inside the timer:
If El.Result = True then
'Get results, deal with data
end if
This isn't written particularly well, and isn't a working example, but is to mearly point you in the right direction, by giving a thread an address of a sub inside a class, you can then access the same class from other threads, which means your form doesn't freeze, and you're not creating a new instance of your form, you are just accessing an existing classes sub routine; just make sure to give yourself a way to get the results (in this example i suggested a timer, but a "get result" button would do the same job) once the thread has completed.
Remeber: If you need Elab to finish before a particular part of code can continue (for example, elab might add two numbers, and you need the result to continue) you can start the thread and do this:
Do until El.Result = True
Application.DoEvents()
System.Threading.Thread.Sleep(1)
Loop
gThread.Join()
Hope this helps a little.
So the answer to your question is; don't put your sub inside a form, instead put it in a class that you can create an instance of.