Scanner scans all sheets then returns

[mmilford42]

Hi

I am currently evaluating GDPicture Imaging for a project... and have the 30 day trial. I am trying to scan from a sheet feeding scanner, but I want to do work on each image before the next one is scanned... however when calling TwainAcquireToGDPictureImage it always scans all the sheets then returns?
I have tried disabling AutoScan and AutoFeed with no success!
I guess I am doing something wrong?

Thanks

Mark

[Loïc]

Hi Mark,

2 possible causes:

1- you are using the WIA bridge through TWAIN. Just use TwainSelectSource method and select a driver without "WIA" prefix.
2- Your twain driver is not TWAIN compliant. Setting AutoScan to false is the only things to do to don't scan all sheet asynchronously.

Solutions:
- Check the WIA issue(1)
- Update your TWAIN driver to the latest available version
- Or use WIA protocol which have been introduced in GdPciture.NET 7. See the sample "Wia acquisition"

Kind regards,

Loïc