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AnswerRe: Issue with accessing object in background thread when converter value updates Pin
Gerry Schmitz14-Jul-16 5:32
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Questionc# network programming(Server /Client ) Pin
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Question[SOLVED] System.AccessViolationException When Calling Dll Function Again Pin
Django_Untaken13-Jul-16 5:39
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AnswerRe: System.AccessViolationException When Calling Dll Function Again Pin
Dave Kreskowiak13-Jul-16 5:55
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AnswerRe: System.AccessViolationException When Calling Dll Function Again Pin
Luc Pattyn13-Jul-16 8:33
sitebuilderLuc Pattyn13-Jul-16 8:33 
Hi,

I'm assuming you are using WinForms and those textXXXFile objects are Controls, maybe TextBoxes. A Control should only be created and used by a single thread, most often that would be the main or "GUI thread"; violating this rule is bound to give you AccessViolation trouble.

I would recommend you use one (or more if you think you must) BackgroundWorker objects ibstead of bare Threads. A BGW will execute most of its task on a separate thread (which it borrows from the ThreadPool), however it also offers progress and completion events which execute on the main thread (assuming you created the BGW on the main thread) so all AccessViolations would disappear.

If you're unfamiliar with the BGW class, read up on it, I'm pretty sure CP has some fine articles about it.

Note 1: you should get the inputfile before entering the DoWork event.

Note 2: you could reuse the BGW object, or create a new one, that is up to you.

Note 3: there are some BGW properties you have to set true explicitly for it to activate all its goodies!


good luck

Smile | :)
Luc Pattyn [My Articles] Nil Volentibus Arduum

GeneralRe: System.AccessViolationException When Calling Dll Function Again Pin
Bernhard Hiller14-Jul-16 3:59
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AnswerRe: System.AccessViolationException When Calling Dll Function Again Pin
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AnswerRe: System.AccessViolationException When Calling Dll Function Again Pin
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AnswerRe: [SOLVED] System.AccessViolationException When Calling Dll Function Again Pin
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AnswerRe: [SOLVED] System.AccessViolationException When Calling Dll Function Again Pin
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Questionthe action cannot be completed because the file is open in w3wp.exe Pin
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QuestionHow To Wire Up This Event Pin
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