I need help - I can help - DPLLoadFromString for PowerBuilder

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DPLLoadFromString for PowerBuilder

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=2560
Printed Date: 07 Jun 25 at 5:16AM
Software Version: Web Wiz Forums 11.01 - http://www.webwizforums.com

Topic: DPLLoadFromString for PowerBuilder

Posted By: KANASTASI
Subject: DPLLoadFromString for PowerBuilder
Date Posted: 11 Mar 13 at 7:03PM

I'm currently using PowerBuilder 11.5 and trying to load a PDF from a string. The PDFs in this application are stored in a SQL Server database as BLOBs.

For some reason I can't get DPLLoadFromString to work correctly.

Here is some of the code :

long il_instance_id

long li_ret

string ls_doc, ls_buf

long ll_len

blob lbob_doc

il_instance_id = DPLCreateLibrary()

li_ret = DPLunlockkey(il_instance_id, ls_debenu_key)
if li_ret = 0 then
messagebox('Error','Could not unlock the Debenu tool.')
return false
end if

ls_doc = string(lblob_doc) //lblob_doc is a PDF blob from the database
ll_len = len(ls_doc)

ls_buf = DPLCreateBuffer(il_instance_id, ll_len)
if ls_buf = '0' then
messagebox('Error','Could not create buffer.')
return false
end if
DPLAddToBuffer(il_instance_id, ls_buf, ls_doc, len(ls_doc))
li_ret = DPLLoadFromString(il_instance_id, ls_buf,'')
if li_ret = 0 then
messagebox('Error','Could not load the document (' + string(dpllasterrorcode(il_instance_id)) + ')')
return false
end if
DPLReleaseBuffer(il_instance_id, ls_buf)

Any ideas?

Thanks!

Replies:

Posted By: Wheeley
Date Posted: 11 Mar 13 at 9:11PM

I don't think this will work. The string statement converts the binary data of the blob into unicode characters. You are going to have to write the blob to disc first with FileWriteEX and than open it with LoadFromFile.

Wheeley

Posted By: KANASTASI
Date Posted: 12 Mar 13 at 12:54PM

Thanks Wheeley for the reply.

I was hoping I could do all of the PDF work without going to disk. If I use the ActiveX method do I still have to go to disk?

Posted By: Wheeley
Date Posted: 13 Mar 13 at 1:56AM

I think your problem is the string function in Powerbuilder. So the ActiveX will fail also. You could test this of course by writing the blob and the string to 2 different files and then try opening both of them as a pdf. My gut is telling me that the one which as a string will fail.

Wheeley