I need help - I can help - Instance Creation

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Instance Creation

Printed From: Debenu Quick PDF Library - PDF SDK Community Forum
Category: For Users of the Library
Forum Name: I need help - I can help
Forum Description: Problems and solutions while programming with the Debenu Quick PDF Library and Debenu PDF Viewer SDK
URL: http://www.quickpdf.org/forum/forum_posts.asp?TID=2960
Printed Date: 06 May 25 at 7:23AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: Instance Creation

Posted By: justincolangelo
Subject: Instance Creation
Date Posted: 20 Aug 14 at 10:30PM

I am unable to create an instance using PDFLibrary in C#.

The dll lives at c:/the project directory/lib/DebenuPDFLibraryDLL1016.dll

I generate the path and also tried hard coding it.

    var dllPath = AppDomain.CurrentDomain.BaseDirectory +     "Lib\\DebenuPDFLibraryDLL1016.dll";

I've included the import file: DebenuPDFLibraryDLL1016.cs

Inside the constructor, dll.dllHandle is always 0. The object is never instantiated.

            dll = new DLL(dllFileName);
            if (dll.dllHandle != IntPtr.Zero)
            {
               instanceID = dll.DebenuPDFLibraryCreateLibrary();
               dll.RegisterForShutdown(instanceID);
            }
            else
            {
               // always gets here
               dll = null;
            }

Does anyone know why this would happen aside from having the wrong location of the dll? I have uninstalled / reinstalled the quick pdf data a few times.

Replies:

Posted By: Ingo
Date Posted: 22 Aug 14 at 7:27PM

Hi Justin,

i've made similar experiences.

Try to put the dll into system32 or syswow64.

If your .net-app is made as 64 bit and if the qp.dll is 64 bit then it should be on 64-bit-systems in system32.

If your .net-app is made as 32 bit and if the qp.dll is 32 bit then it should be on 64-bit-systems in syswow64.

Bit-architecture should always the same for app and dll.

Cheers and welcome here,

Ingo

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Cheers,
Ingo