Re: Invoking a form that was created on a separate thread

The first question has to be why are you creating a Form on another thread?
It's a very bad idea, a bad design, and bad practice.


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Chris Tacke
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"Dan" <daniel@xxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:e5x$vrdQFHA.3628@xxxxxxxxxxxxxxxxxxxxxxx
> Hi everyone
>
> I have a class which parses an xml file and creates a form and its
> controls from it, and I have recenlty moved this so that it happens on its
> own thread, I know about controls that are created on a different thread
> to the UI can not just have its methods called without using invoke so
> with this I have tried several different ways to get the form to show but
> I'm having problems.
>
> The ways I have have tried are:
>
> 1. With the form that is returned from the parsing class I have tried
> me.invoke(new delegateSub(addressof newform.show))
> This throws the error "Cannot call Invoke or InvokeAsync on a control
> until the window handle has been created."
>
> 2. Add a controller class that is also created on the separate thread
> which shows the form when the parsing is complete, this does show the form
> briefly but it then disappears.
>
> 3. With the same controller class I use Application.Run(parsedform). This
> works beautifully apart from one small snag, the class which starts the
> parsing is passed a reference to the parser and acts as the code behind
> for the the controls that are created in the parsed form e.g. the click
> event of a button in the parsed form is handled by a method in the class
> that is sent to the parser. This is where this method seems to fall down
> because the reference no longer works.
>
> Am I fighting a loosing battle with this or can anyone offer some code of
> wisdom.
> Any help will be much appreciated.
>
> Many Thanks
> Dan
>
>
>
>


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