Re: Using Imprinter

Hello,

I am using LeadTools v16. and the .NET class library.



I am developing a general scanning application. What I like to say with "general" is that the application should work in any PC with any twain scanner.

To avoid showing the "user interface window" of each twain driver, I made a windows form with most of the typical functionality (resolution, paper size, scanning type, etc). Before showing this "general configuration form" I query the supported capabilities to enable or disable some parts of this form. For example: if the scanner does not support "imprinter", the "imprinter configuration" are of the form should be disabled.

 But I am having some problems to implement the printer capability. I am trying the application with a kodak i610 scanner. Its supports next printer capabilities: printer, printerenabled, printerindex and printersuffix.

And I amd using the next code:

                Dim ltCapImprinter As New TwainCapability
                ltCapImprinter.Information.Type = TwainCapabilityType.Printer
                ltCapImprinter.Information.ContainerType = TwainContainerType.OneValue
                ltCapImprinter.OneValueCapability.ItemType = TwainItemType.Int32
                ltCapImprinter.OneValueCapability.Value = TwainCapabilityValue.PrinterImprinterTopBefore
                oSesionTwain.SetCapability(ltCapImprinter, TwainSetCapabilityMode.Set)

                Dim ltCapImprinterEnabled As New TwainCapability
                ltCapImprinterEnabled.Information.Type = TwainCapabilityType.PrinterEnabled
                ltCapImprinterEnabled.Information.ContainerType = TwainContainerType.OneValue
                ltCapImprinterEnabled.OneValueCapability.ItemType = TwainItemType.Int32
                ltCapImprinterEnabled.OneValueCapability.Value = 1
                oSesionTwain.SetCapability(ltCapImprinterEnabled, TwainSetCapabilityMode.Set)

                Dim ltCapImprinterIndex As New TwainCapability
                ltCapImprinterIndex.Information.Type = TwainCapabilityType.PrinterIndex
                ltCapImprinterIndex.Information.ContainerType = TwainContainerType.OneValue
                ltCapImprinterIndex.OneValueCapability.ItemType = TwainItemType.Int32
                ltCapImprinterIndex.OneValueCapability.Value = 22
                oSesionTwain.SetCapability(ltCapImprinterIndex, TwainSetCapabilityMode.Set)

                Dim ltCapImprinterSuffix As New TwainCapability
                ltCapImprinterSuffix.Information.Type = TwainCapabilityType.PrinterSuffix
                ltCapImprinterSuffix.Information.ContainerType = TwainContainerType.OneValue
                ltCapImprinterSuffix.OneValueCapability.ItemType = TwainItemType.Str255
                ltCapImprinterSuffix.OneValueCapability.Value = "PLG"
                oSesionTwain.SetCapability(ltCapImprinterSuffix, TwainSetCapabilityMode.Set)

But whe I do the  oSesionTwain.Acquire(Twain.TwainUserInterfaceFlags.None) documents are not printed.

Could you please help me???

Thanks in advance,

Pablo L.G.

Pablo,
It appears you're using incorrect TwainItemType values for the data types.
For TwainCapabilityType.Printer, you should use TWTY_UINT16, which is TwainItemType.Uint16 in LEADTOOLS .NET.
Similarly, for CAP_PRINTERENABLED, you should use TW_BOOL, not TWTY_UINT32.

Please refer to the Twain specification for details on the capability types.

Thanks Adnan,

That was not exactly the problem. I discovered that our kodaks scanner have some custom capabilities that I should work with to use imprinter.

Thanks,

Pablo L.G.