Re: Scanner settings Through code

Hi support team,

             I am using LeadTools 16.5.  When Acquiring images the Configuration of the scanner like Scanning Option(singlePage,ScanAhead),Feeding Option is selected in the ComboBox.

    The settings of the scanner such as single page,multi page,pagesize has to be given in code.

Kindly provide me code for giving the scanner settings through code.

  

 

 

 

 

 

What is the LEADTOOLS programming interface (C DLL, .Net Classes, C++ Class Library, etc.) that you use?

Thanks,
Maen Badwan
LEADTOOLS Technical Support

.Net Classes

               I am using DotNet.

 

 

 

 

 

 

 

 

For Single page, Use the SetCapability Method and set the capability corresponding to TwainCapabilityType.TransferCount (CAP_XFERCOUNT Twain capability) to 1.
For multi-page, set it to a value greater than 1 or set it to -1 (minus one) to scan all pages in the feeder.

Also use the SetCapability Method and select the desired paper size using the TwainCapabilityType.ImageSupportedSizes capability (ICAP_SUPPORTEDSIZES).

For more details about the ICAP_SUPPORTEDSIZES and CAP_XFERCOUNT settings, please refer to the Twain specification document from the Twain working group.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

 

Kindly provide me some sample codings for configuring the above Settings. I am using LeadTools 16.5. It will be useful if the sample codings are in Dot Net. 

 

Hello,

For more information about using options in Twain, please see the help file topic "Getting and Setting Capabilities" in the .NET help file (http://www.leadtools.com/Help/LEADTOOLS/v16/DH/TO/Leadtools.Topics~Leadtools.Topics.GettingAndSettingCapabilities.html). You can also see specific examples on how to get and set capabilities in the listings for TWainSession.GetCapability and TwainSession.SetCapability. You can navigate to these through the above link.

For a specific example relating to setting the TransferCount with SetCapability, please see the following posting:
http://support.leadtools.com/SupportPortal/CS/forums/30439/ShowPost.aspx

Thanks for the code.

                Similarly i want to set other configurations of scanner through code.

         Configurations that i need to set is paper size, Mode,DPI,Feeding option.

I want the sample source in dotnet.I have installed leadtools 16.5 in my machine. 

(1) For paper size, you need to set the ICAP_SUPPORTEDSIZES capability as follows:

' ICAP_SUPPORTEDSIZES
twCap.Information.Type = TwainCapabilityType.ImageSupportedSizes
twCap.Information.ContainerType = TwainContainerType.OneValue
twCap.OneValueCapability.ItemType = TwainItemType.Uint16
twCap.OneValueCapability.Value = TwainCapabilityValue.SupportedSizesA3
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)

(2) For feeder options, you need to set the following capabilities:

' CAP_FEEDERENABLED
twCap.Information.Type = TwainCapabilityType.FeederEnabled
twCap.OneValueCapability.ItemType = TwainItemType.Bool
twCap.OneValueCapability.Value = True
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)

' CAP_AUTOFEED
twCap.Information.Type = TwainCapabilityType.AutoFeed
twCap.OneValueCapability.ItemType = TwainItemType.Bool
twCap.OneValueCapability.Value = True
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)


(2) For Image resolution, you need to set the following capabilities:

' ICAP_XRESOLUTION
twCap.Information.Type = TwainCapabilityType.ImageXResolution
twCap.OneValueCapability.ItemType = TwainItemType.Fix32
twCap.OneValueCapability.Value = 100
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)

' ICAP_YRESOLUTION
twCap.Information.Type = TwainCapabilityType.ImageYResolution
twCap.OneValueCapability.ItemType = TwainItemType.Fix32
twCap.OneValueCapability.Value = 100
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)

(4) What exactly do you mean by "Mode"?

Thanks,
Maen Badwan
LEADTOOLS Technical Support

I tried the code for setting papersize in the above example as follows,

 twCap.Information.Type = TwainCapabilityType.ImageSupportedSizes
twCap.Information.ContainerType = TwainContainerType.OneValue
twCap.OneValueCapability.ItemType = TwainItemType.Uint16
twCap.OneValueCapability.Value = TwainCapabilityValue.SupportedSizesA3
_session.SetCapability(twCap, TwainSetCapabilityMode.Set)

     An exception was thrown as "Required capability not supported"

kindly provide me solution for this problem.

Does your scanner support the ICAP_SUPPORTEDSIZES capability?

If your scanner doesn't support the ICAP_SUPPORTEDSIZES capability, you will not be able to set the ImageSupportedSizes capability in your code.

Thanks,
Maen Badwan
LEADTOOLS Technical Support

 

Hi Maen,

    In the above example  i used the image Resolution sample code.

   i got the error as "Invalid Parameter passed" in the below line while execution 

  twCap.OneValueCapability.ItemType = TwainItemType.Fix32

i am using leadtools 16.5 and HP PSC 1410 All - in - One scanner.

Does the value 100 in the below code stands for DPI(dots per inch)

twCap.OneValueCapability.Value = 100

Kindly provide me a solution for the above error.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

You need to set the TwainCapability.Information.ContainerType to TwainContainerType.OneValue before setting the capability:
+------------+
TwainCapability twCap = new TwainCapability();
twCap.Information.ContainerType = TwainContainerType.OneValue;
twCap.Information.Type = TwainCapabilityType.ImageXResolution;
twCap.OneValueCapability.ItemType = TwainItemType.Fix32;
twCap.OneValueCapability.Value = 100;
_twainSession.SetCapability(twCap, TwainSetCapabilityMode.Set);
+------------+

For more information about the ICAP_XRESOLUTION capability, please refer to the Twain specification.

Thanks,
Maen Badwan
LEADTOOLS Technical Support