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mLipok

Debenu - QuickPDF - Loads a PDF document from a byte array stored as a Variant type

3 posts in this topic

#1 ·  Posted (edited)

here is an Documentation for Debenu QuickPDF - Function:  LoadFromVariant  

http://www.debenu.com/docs/pdf_library_reference/LoadFromVariant.php

Those who know me, they could see that I had language problems;)

Therefore, I would ask for help in understanding this part of the documentation:

Loads a PDF document from a byte array stored as a Variant type.

 

I hope I will be able to use this function to directly read the PDF document stored in MS SQL database as binary data without having to write them to a file and then read from the file

 

 

The following piece of binary data read from the database MS SQL:

0x255044462D312E340A25E2E3CFD30A312030206F626A0A3C3C0A2F4D65746164617461203220302052 .........

 

 

mLipok

ps.

I am in the process of creating the appropriate UDF for AutoIt.

EDIT:

More specifically, in terms of what AutoIt is the wording: "byte array"

Edited by mLipok

Wondering who uses AutoIT and what it can be used for ?


ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button:

Spoiler

Last update: 2017-03-27
Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAPPOP3.au3 UDF *  RTF Printer - UDF * XML.au3 - BETA * ADO.au3 UDF SMTP Mailer UDF * WinSCP UDF *

My contribution to others projects: * _sql.au3 UDF  *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Best coding practices * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

 

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using $oQP.SaveToFile($sFileName)   I did a test:

Func _QPdf_Example_HelloWorld()
    Local $sFileName = @ScriptDir & "\hello-world.pdf"
    Local $oQP = ObjCreate($__sClassName)
    If __QPdf_UnlockKey($oQP, $__sLicenseKey) = 1 Then
;~      $oQP.AddPageLabels(1, 1, 10, '_QPdf_Example_HelloWorld()')
        $oQP.SetOrigin(1);
        $oQP.SetTextSize(20);
        $oQP.DrawText(100, 100, "Hello world from AutoIt")
        If $oQP.SaveToFile($sFileName) = 1 Then
            MsgBox($MB_SYSTEMMODAL, "Info", "File " & $sFileName & " written successfully.")
        Else
            MsgBox($MB_SYSTEMMODAL, "Error", "File " & $sFileName & " could not be written.")
        EndIf
        $aByteArray = $oQP.SaveToVariant()
        MsgBox($MB_SYSTEMMODAL, '$oQP.SaveToVariant()', VarGetType($aByteArray))
        Local $fHandle = FileOpen($sFileName, 16 + 128)
        $aByteArray2 = FileRead($fHandle)
        FileClose($fHandle)
        MsgBox($MB_SYSTEMMODAL, 'Compare results:', $aByteArray = $aByteArray2)

        FileDelete(@ScriptDir & '\aByteArray.txt.')
        FileWrite(@ScriptDir & '\aByteArray.txt.', $aByteArray)
        FileDelete(@ScriptDir & '\aByteArray2.txt.')
        FileWrite(@ScriptDir & '\aByteArray2.txt.', $aByteArray2)

    EndIf
EndFunc   ;==>_QPdf_Example_HelloWorld
; ===============================================================================================================================

So altogether, it is a simple binary variable.

There are two differences arising out of various recording time to file and to a variable.

/ModDate (D:20140426221401+02'00')
/ModDate (D:20140426221400+02'00')
<xmp:ModifyDate>2014-04-26T22:14:01+02:00</xmp:ModifyDate>
<xmp:ModifyDate>2014-04-26T22:14:00+02:00</xmp:ModifyDate>

Wondering who uses AutoIT and what it can be used for ?


ADO.au3 UDF     POP3.au3 UDF     XML.au3 UDF    How to use IE.au3  UDF with  AutoIt v3.3.14.x  for other useful stuff click the following button:

Spoiler

Last update: 2017-03-27
Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind. 

My contribution (my own projects): * Debenu Quick PDF Library - UDF * Debenu PDF Viewer SDK - UDF * Acrobat Reader - ActiveX Viewer * UDF for PDFCreator v1.x.x * XZip - UDF * AppCompatFlags UDF * CrowdinAPI UDF * _WinMergeCompare2Files() * _JavaExceptionAdd() * _IsBeta() * Writing DPI Awareness App - workaround * _AutoIt_RequiredVersion() * Chilkatsoft.au3 UDF * TeamViewer.au3 UDF * JavaManagement UDF * VIES over SOAPPOP3.au3 UDF *  RTF Printer - UDF * XML.au3 - BETA * ADO.au3 UDF SMTP Mailer UDF * WinSCP UDF *

My contribution to others projects: * _sql.au3 UDF  *

Useful links: * Forum Rules * Forum etiquette *  Forum Information and FAQs * How to post code on the forum * AutoIt Online Documentation * AutoIt Online Beta Documentation * SciTE4AutoIt3 getting started * Convert text blocks to AutoIt code * Games made in Autoit * Programming related sites * Polish AutoIt Tutorial * DllCall Code Generator * 

Wiki: Expand your knowledge - AutoIt Wiki * Collection of User Defined Functions * How to use HelpFile * Best coding practices * 

IE Related:  * How to use IE.au3  UDF with  AutoIt v3.3.14.x * Why isn't Autoit able to click a Javascript Dialog? * Clicking javascript button with no ID * IE document >> save as MHT file * IETab Switcher (by LarsJ ) * HTML Entities *

I encourage you to read: * Global Vars * Best Coding Practices * Please explain code used in Help file for several File functions * OOP-like approach in AutoIt * UDF-Spec Questions *  EXAMPLE: How To Catch ConsoleWrite() output to a file or to CMD *

"Homo sum; humani nil a me alienum puto" - Publius Terentius Afer
"Program are meant to be read by humans and only incidentally for computers and execute" - Donald Knuth, "The Art of Computer Programming"
:naughty:  :ranting:, be  :) and       \\//_.

Anticipating Errors :  "Any program that accepts data from a user must include code to validate that data before sending it to the data store. You cannot rely on the data store, ...., or even your programming language to notify you of problems. You must check every byte entered by your users, making sure that data is the correct type for its field and that required fields are not empty."

 

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