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ePrint COM in threads Started by Nephilim2612 at 10-03-2007 7:08. Topic has 2 replies. LEAD Support Fo... » Developer » ePrint API » ePrint COM in threads

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10-03-2007, 7:08 Nephilim2612 Joined on 06-19-2007 Posts 12 ePrint COM in threads Regarding the following thread i posted some weeks ago: http://support.leadtools.com/SupportPortal/cs/forums/15861/ShowPost.aspx I've tried to make this sample application becoming a service, but i've found an important problem. My service send multiple documents (i.e, called "doc1", "doc2", etc...) through a loop. The first is processed ok, but when i try with the second, all is going right until the method "EndDocumentConversion" is called. The point is that, in order this operation to be performed within a service, it has to be invoked within a new thread. Do this have any decissive influence regarding the problem i'm chasing against? If yes, how can i solve it? Thank you very much, Jesús    Report

10-04-2007, 9:07 Adnan Ismail Joined on 07-31-2006 Posts 1,361 Re: ePrint COM in threads Jesús, Do you mean your program works in multiple-threads, or it does not work in multiple-threads? In any case, to be able to use our ePrint 5 COM object, the threading model of the thread that creates the object must be Single-threaded apartment. Adnan Ismail LEADTOOLS Technical Support    Report

10-05-2007, 6:57 Nephilim2612 Joined on 06-19-2007 Posts 12 Re: ePrint COM in threads Hi, Adnan, The service i'm testing creates a single thread within where all the documents to be converted are processed. I have tested both the STA and MTA models. At this time i've been able to solve the problem, i think definitively. The cause was that i was storing the hDC value returned by the CreateSaveDC method in a global service variable. By keeping the value in a local method variable seems to be the problem is solved. I think, if that helps you, that it could be a problem regarding the context where certain values are kept/recovered. I think this should be an issue regarding multi-threading with .NET, or maybe regarding .NET multi-threading VS COM, but maybe it could have to be with ePrint COM. I leave here this info in case it has to be with ePrint COM and can help you. Thank you very much    Report

LEAD Support Fo... » Developer » ePrint API » ePrint COM in threads

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