Not picking documents from ADF, only scans flatbed.

[mtorroella]

Currently using an HP ScanJet Enterprise Flow 7500 under Windows 7. I load the ADF with documents (the green led indicadtor turns on) but when I click the Scan button it only scans from flatbed.

Any ideas ?

[gideondsouza]

hi,

unfortunately for many years this project was hosted on codeplex and there were far many failures or dd exceptions from different hardware.

So sadly it may just be a hardware thing We could try and figure it out.

I don't have your hardware so, would be great if you could set a breakpoint on this line and see if it manages to detect the auto feeder and then if it correctly detects if there are more pages.

Let me know. 😄

Thanks for posting 👍 . It's the only to weed out hardware issues.

[mtorroella]

Thanks for the fast response gideondsouza. It doesn't enter to that IF statement, don't know why as it doesn't return 0.

The Convert.ToUInt32(documentHandlingSelect.Value) returns 2 And WIA_DPS_DOCUMENT_HANDLING__SELECT.FEEDER returns 1

Also, before reaching that statement, it has already done 1 scan using flatbed. So the problem seems to be before that statement. It is clearly not detecting the ADF. However if instead of using: img = DirectCast(WiaCommonDialog.ShowTransfer(Item, wiaFormatTIFF, False), ImageFile) I use: img = WiaCommonDialog.ShowAcquireImage(WIA.WiaDeviceType.ScannerDeviceType, WiaImageIntent.ColorIntent) And choose manually the ADF, it works fine (but only scans 1 sheet)

[gideondsouza]

hey thanks for the updates.

And choose manually the ADF What do you mean by this? on your printer itself or an interface on the os?

I wonder if you could change it so that hasMorePages is always true and it attempts trying to get more scans? what if you tried this?

[mtorroella]

What do you mean by this? on your printer itself or an interface on the os?

The interface of wiaaut.dll library. When you use WiaCommonDialog.ShowAcquireImage instead of ShowTransfer it prompts a quick wizard allowing you to choose Flatbed/ADF, Page Size (if ADF is selected), Color/Gray, etc.

I wonder if you could change it so that hasMorePages is always true and it attempts trying to get more scans?

It always tries to scan with Flatbed when using ShowTransfer .

[gideondsouza]

yea it's been over 5 years i used this in production. I'm going to try and try to emulate some hardware or look into the WIA lib but it'll take sometime, especially because I barely use windows now! Meanwhile if you find something that works please let me know,

[mtorroella]

Sure I will. I've paused the project for a while (can't spend more time on it). They will use the assistant while I don't find a solution to make it dialog-less.

[portarri]

I appreciate that this issue is old, however I'm looking to be able to scan multi-page documents using an ADF and am looking at this library. Using the library as is, it will only scan documents from the flatbed. The only way I can make it use the Document Feeder is by adding the following code just after connecting to the scanner:

int docSrc = 1 // 1 = Document Feeder, 2 = Flatbed.

foreach (Property prop in WiaDev.Properties) { if (prop.PropertyID == WIA_PROPERTIES.WIA_DPS_DOCUMENT_HANDLING_SELECT) { prop.set_Value(docSrc); break; } }

However, I only get the first page of the documents I trying to scan. It throws a scanner busy error on the second iteration of the loop, however all documents feed through the scanner.