Threading

[Fredje]

Hello,

I have the following problem:
I'm making a application that add at runtime usercontrols.
Each usercontrol have a function that converts a image.
This conversion takes a while and at the time the function is running the
applications blocks.
So I want to implement Threading but only for the moment this function is
running.
I have to pass arguments to the function like width, height,...

How can I prevent that the application doesn't block when this function is
running?

Thanks in advance.

[Drebin]

You answered your own question: by starting a thread..

You can't send ThreadStart any arguments, so what most people do - is create
a class, that will do the thread work.. so in psuedo-code:

-create an instance of the threadworker class (call it objWorker)
-assign height, width, other properties to objWorker
-create a thread, and assign it to objWorker.DoWork()

hth

"Fredje" <co*****@hotmail.com> wrote in message
news:Gk******************@afrodite.telenet-ops.be...

Hello,

I have the following problem:
I'm making a application that add at runtime usercontrols.
Each usercontrol have a function that converts a image.
This conversion takes a while and at the time the function is running the
applications blocks.
So I want to implement Threading but only for the moment this function is
running.
I have to pass arguments to the function like width, height,...

How can I prevent that the application doesn't block when this function is
running?

Thanks in advance.

[AlexS]

You can pass back created picture or controls to UI thread. Just remember,
that you can't update UI thread controls (main form) reliably from another
thread. Take a look at InvokeRequired and Invoke/BeginInvoke methods of
Control object.

HTH
Alex

"Fredje" <co*****@hotmail.com> wrote in message
news:qm*******************@phobos.telenet-ops.be...

Thank you very much.

This already working.
The result of the function is a picture. This picture must be placed in a
picturebox in the parent of the class objWorker. I've solved this now by
passing the picturebox form the parent width the constructor of the object
objWorker.
Is this a good way of working?

I want also when the function is completed width running the tread stops and dipose.
But before the tread dipose the image must be saved.
Is it better that is do this from the object objWorker or from the parent?

Thank you again

"Drebin" <tR*************@hotmail.com> wrote in message
news:Nn**********************@newssvr28.news.prodi gy.com...

You answered your own question: by starting a thread..

You can't send ThreadStart any arguments, so what most people do - is create

a class, that will do the thread work.. so in psuedo-code:

-create an instance of the threadworker class (call it objWorker)
-assign height, width, other properties to objWorker
-create a thread, and assign it to objWorker.DoWork()

hth

"Fredje" <co*****@hotmail.com> wrote in message
news:Gk******************@afrodite.telenet-ops.be...

Hello,

I have the following problem:
I'm making a application that add at runtime usercontrols.
Each usercontrol have a function that converts a image.
This conversion takes a while and at the time the function is running the applications blocks.
So I want to implement Threading but only for the moment this function is running.
I have to pass arguments to the function like width, height,...

How can I prevent that the application doesn't block when this

function is running?

Thanks in advance.