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

Hi Chris your right its not good all, the the thing is the xml files that
are being parsed are pretty big and they take quite a bit of time, so I need
to put a progress bar on, I did try creating that on the main the and then
updating that from a separate thread.

If there is a better way to do this I'm open to all suggestions cos this is
p#@*ing me off

Thanks
Dan
"Chris Tacke, eMVP" <ctacke@xxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:u9%23zJ0dQFHA.1528@xxxxxxxxxxxxxxxxxxxxxxx
> 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.
>
>
> --
> Chris Tacke
> Co-founder
> OpenNETCF.org
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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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