I need help - I can help - DPLSelectDocument not selecting any document

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DPLSelectDocument not selecting any document

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=2844
Printed Date: 29 Sep 24 at 1:14AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: DPLSelectDocument not selecting any document

Posted By: hugetto
Subject: DPLSelectDocument not selecting any document
Date Posted: 04 Mar 14 at 11:39AM

Hello, I'm trying the trial version in C++ but i cannot Select any document.

This is the code I use:

DEBENUPDFLIBRARYLIB1012_DllMain(GetModuleHandle(NULL), DLL_PROCESS_ATTACH, NULL);
InstanceID = DPLCreateLibrary();
if (DPLUnlockKey(InstanceID, L"<insert license key here>") == 1)
{
     int DocumentID = DPLDAOpenFileReadOnly(InstanceID, L"C:\\file.pdf", nullptr);
     int err = DPLLastErrorCode(InstanceID);
     int lSelected = DPLSelectDocument(InstanceID, DocumentID);
     int lOutDoc = DPLSelectedDocument(InstanceID);
}

This are the output variables:
InstanceID = 99020448
DocumentID = 1476395009
err = 0
lSelected = 0 //which means have failed, but I don't know why it failed
lOutDoc = 1476395008 //Why it's the same number as DocumentID minus 1?

What's happening?

Thank you

Replies:

Posted By: AndrewC
Date Posted: 05 Mar 14 at 2:45AM

Hello,

You are mixing DA functions with non DA functions. The DA functions only work with other DA functions.

So if you change the following line from

int DocumentID = DPLDAOpenFileReadOnly(InstanceID, L"C:\\file.pdf", nullptr);

int ret = DPLLoadFromFile(InstanceID, L"C:\\file.pdf", nullptr);

DocumentId = DQPLSelectedDocument(InstanceID);

If ret = 1 then the file has loaded correctly.

The ID's are handle numbers we use internally.

Andrew.

Posted By: hugetto
Date Posted: 05 Mar 14 at 7:30AM

Thank you for this information, but i've got the same results when I render the page with the DPLRenderPageToString function

int DocumentID = DPLLoadFromFile(InstanceID, L"C:\\example.pdf", nullptr);
char *ret = DPLRenderPageToString(InstanceID, 24, 1, 5);

The DocumentID is 1
The *ret value is "‰PNG\r\n\x1a\n" using the DPLLoadFromFile function and the DPLDAOpenFileReadOnly function.

What I'm doing wrong?

Thank you

Posted By: Ingo
Date Posted: 10 Mar 14 at 7:18PM

Hi,

i don't know what's wrong in your special issue.

What you should check is:

Is it possible to open the pdf with a good reader like Foxit?

At second you should use LastErrorCode (after each function line).

Perhaps this function will tell you what's going wrong.

Cheers and welcome here,

Ingo

-------------
Cheers,
Ingo

Posted By: hugetto
Date Posted: 11 Mar 14 at 7:47AM

Hi Ingo,

I can open my pdf with a pdf viewer.
And I put

err = DPLLastErrorCode(InstanceID);

After every function, and always return 0.

This is the function I put all together:

void showpdf()
{
     static int hug3 = 0;
     static int InstanceID = 0;
     if (hug3 == 0)
     {
          DEBENUPDFLIBRARYLIB1012_DllMain(GetModuleHandle(NULL), DLL_PROCESS_ATTACH, NULL);
          int err = DPLLastErrorCode(InstanceID);
          InstanceID = DPLCreateLibrary();
          err = DPLLastErrorCode(InstanceID);
          if (DPLUnlockKey(InstanceID, L"your_private_licensekey") == 1)
          {
               err = DPLLastErrorCode(InstanceID);
               //int DocumentID = DPLDAOpenFile(InstanceID, L"C:\\Users\\Hug\\Desktop\\example.pdf", nullptr);
               int DocumentID = DPLLoadFromFile(InstanceID, L"C:\\Users\\Hug\\Desktop\\example.pdf", nullptr);
               //int m = DPLSelectDocument(InstanceID, DocumentID);
               err = DPLLastErrorCode(InstanceID);
               int lDoc = DPLSelectedDocument(InstanceID);
               err = DPLLastErrorCode(InstanceID);
               char *ret = DPLRenderPageToString(InstanceID, 24, 1, 5);
               err = DPLLastErrorCode(InstanceID);
               hug3 = true;
          }
     }
}

Here are the debug output variables

DocumentID     1476395009     int
lDoc     1476395008     int
ret     0x06493688 "‰PNG\r\n\x1a\n"     char *
err     0     int
InstanceID     105836192     int
hug3     1     int

Thank you

Posted By: hugetto
Date Posted: 11 Mar 14 at 1:10PM

I've downloaded today the 2013 version but I still got this output.

Posted By: hugetto
Date Posted: 11 Mar 14 at 1:22PM

I tried other functions like on the turorial, and they work propperly:

Ex:
DPLDrawText(InstanceID, 100, 500, L”Hello world”);
DPLSaveToFile(InstanceID, L”C:\\Docs\\HelloFromLIB.pdf”);
DPLReleaseLibrary(InstanceID);

Posted By: hugetto
Date Posted: 11 Mar 14 at 1:34PM

I can render to a png file using this function:

DPLRenderPageToFile(InstanceID, 64, 1, 5, L"C:\\Users\\Hug\\Desktop\\example.png");

But I can't using the other function.

I did strlen on the char* ret and i get 8 which is the "‰PNG\r\n\x1a\n" string.

I could use the render to file function, but I would prefer to use the other one if possible.

Posted By: AndrewC
Date Posted: 14 Mar 14 at 1:58AM

Hugetto,

The length of the binary data returned from the library can be obtained using DPLAnsiStringResultLength(); You will need to call this directly after calling DPLRenderPageToFile.

All image will return binary data including NULL characters ('\0') and so strlen() will not work.

Andrew.