Shut down thread - thread closes form, form doesn't close because thread calls it etc...

Its ok, nobody panic. I solved this one with an asynchronous call to the
main thread and a bit of fiddling about :)

"Robin Tucker" <id*************************@reallyidont.com> wrote in
message news:bm*******************@news.demon.co.uk...

Some thread confusion to lighten up your day:

I have a worker thread and a main form. When the user clicks the Close icon in the top right of the form, my program tells the thread to "stop". The
thread will then complete its current operation and "Invoke" a method on the form telling it it has completed. The completed handler then calls Me.Close (). The trouble is, I seem to have some deadlock here - I mean after I call Me.Close(), does the form exit the method, return to the thread etc.?

How exactly can a worker thread shut down the form that created it!???

Any ideas?
Cheers
Robin

Hi Robin,

Praise be that you've solved it!!. My heart's been pounding and my face
has been flushed and my mind's been all of a dither. I can calm down now!!
Aaaaahh. ;-))

Regards,
Fergus

Hi Fergus,

Can you point me to a tutorial that will allow me to share controls among
threads? I am able to do datasets and such as long as I dont use them in the
primary thread but I would like to learn how to use controls otherwise if I
can.

"Fergus Cooney" <fi******@tesco.net> wrote in message
news:Oc**************@TK2MSFTNGP12.phx.gbl...

Hi Robin,

Praise be that you've solved it!!. My heart's been pounding and my face has been flushed and my mind's been all of a dither. I can calm down now!!
Aaaaahh. ;-))

Regards,
Fergus

You just need to use Delegate and the controls "Invoke" method. This will
ensure that the control method is executed on the controls thread, not the
thread making the call. Like this:

Here is a delegate, representing a method on my main form (doesn't matter
what it is, could be anything really) - this delegate is defined in my
thread.

Private Delegate Sub _onBeginNodeOperations_Delegate(ByVal nAdding As
Integer, ByVal OperationType _
As OperationsThreadState.NodeOperations, ByVal bIsUndoRedo As
Boolean)

Now, the thread wants to execute the delegate method on the main form
thread, not the current thread, so:

Try

m_Form.Invoke(New _onBeginNodeOperations_Delegate(AddressOf
m_Form.BeginNodeOperations), Parameters)

Catch ex As Exception

End Try
"scorpion53061" <sc************@yahoo.com> wrote in message
news:u2**************@TK2MSFTNGP10.phx.gbl...

Hi Fergus,

Can you point me to a tutorial that will allow me to share controls among
threads? I am able to do datasets and such as long as I dont use them in the primary thread but I would like to learn how to use controls otherwise if I can.

"Fergus Cooney" <fi******@tesco.net> wrote in message
news:Oc**************@TK2MSFTNGP12.phx.gbl...

Hi Robin,

Praise be that you've solved it!!. My heart's been pounding and my

face

has been flushed and my mind's been all of a dither. I can calm down now!! Aaaaahh. ;-))

Regards,
Fergus