DAGetPageHeight returns always 0.0

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   I want to render a preview of an existing PDF into a given rectangle of my dc.
Is that anyhow possible? The render function takes only the DPI, but not the size in pixel, and it begins always at upper left corner of the DC.
Or have I first to render to a bitmap and then to bitblt the bitmap?
How can I detect the aspect ratio of my PDF (or page)? The commands DAGetPageHeight / DAGetPageWidth always return 0.0 when I call them.
Can I render a part of a page? (zoom)
Thank you very much for any answer!

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Didi Members Profile Find Members Posts Beginner Joined: 23 Mar 10 Status: Offline Points: 9	Post Options Post Reply Quote Didi Report Post Thanks(0) Quote Reply Topic: DAGetPageHeight returns always 0.0 Posted: 24 Mar 10 at 12:25PM
	I want to render a preview of an existing PDF into a given rectangle of my dc. Is that anyhow possible? The render function takes only the DPI, but not the size in pixel, and it begins always at upper left corner of the DC. Or have I first to render to a bitmap and then to bitblt the bitmap? How can I detect the aspect ratio of my PDF (or page)? The commands DAGetPageHeight / DAGetPageWidth always return 0.0 when I call them. Can I render a part of a page? (zoom) Thank you very much for any answer!

Didi Members Profile Find Members Posts Beginner Joined: 23 Mar 10 Status: Offline Points: 9	Post Options Post Reply Quote Didi Report Post Thanks(0) Quote Reply Posted: 24 Mar 10 at 4:04PM
	EDIT the functions PageHeight() and PageWidth() work, in my examples the unis was "point". Can I detect which unit is given?

Paddy Members Profile Find Members Posts Beginner Joined: 24 Mar 10 Status: Offline Points: 8	Post Options Post Reply Quote Paddy Report Post Thanks(0) Quote Reply Posted: 24 Mar 10 at 7:49PM
	Hi, the SetMeasurementUnits function lets you control which measurement unit is used when measurements are given to and returned from the library. Edited by Rowan - 24 Mar 10 at 7:51PM

Dario Members Profile Find Members Posts Beginner Joined: 26 Jul 09 Location: Italy Status: Offline Points: 19	Post Options Post Reply Quote Dario Report Post Thanks(0) Quote Reply Posted: 24 Mar 10 at 9:38PM
	You cannot use Da Functions and Normal function together. The SetMeasurementUnits work with Normal function not DaFunctions If you want to know the "mm" for example, you have to multiply the value for 25.4/72 Dim HandlerFILE As Long = QUICKPDF_Doc.DAOpenFileReadOnly(FileSelezionato, "") Dim Pagina As Long = QUICKPDF_Doc.DAFindPage(HandlerFILE, 1) Dim Misura_l As String = CInt(QUICKPDF_Doc.DAGetPageWidth(HandlerFILE, Pagina) * 25.4 / 72).ToString Dim Misura_h As String = CInt(QUICKPDF_Doc.DAGetPageHeight(HandlerFILE, Pagina) * 25.4 / 72).ToString Me.ListaFiles.Items(Indice).SubItems(6).Text = (Misura_l & " x " & Misura_h) QUICKPDF_Doc.DACloseFile(HandlerFILE) OK? bye

Didi Members Profile Find Members Posts Beginner Joined: 23 Mar 10 Status: Offline Points: 9	Post Options Post Reply Quote Didi Report Post Thanks(0) Quote Reply Posted: 25 Mar 10 at 8:17AM
	Thank you! I thought, it could depend on different files, wich unit is returned, but by default, it's always "point"? What's the difference between "DA" and "Normal"? I think QuickPDF is a excellent tool, but newbies like me could save lots of time, if there was more example progams available.

Dario Members Profile Find Members Posts Beginner Joined: 26 Jul 09 Location: Italy Status: Offline Points: 19	Post Options Post Reply Quote Dario Report Post Thanks(0) Quote Reply Posted: 26 Mar 10 at 1:45PM
	When you using DA-Functions.... YES If you using Normal function like LoadFromFile (for example) you can before set the unit with the function SetMeasurementUnits (1=mm, 2= inches) DaFunction are the function with hight performance (Direct Access functionality), for me Normal function are all function without prefix "DA" before the function's name. The problem is that there are many function normal and few DA-Function. There is a "DEMO App" program with some samples. Download it and install. This is the address. http://www.quickpdflibrary.com/blog/2009/10/a-customizable-demo-for-quick-pdf-library/ P.S. You buy the "mantenance" licence, because the QuickPDF Team are really good when you ask assistance.