Dynamsoft TWAIN Products

The following code can be called and called when not using an adf, you can call it with adf off and then once with adf, and then no other scan will work, bascally 1 adf scan kills the scanner (restarting the app is necessary), Visual Studio cannot debug it as it's in "native code" am I doing something really dumb or is there a problem?

- Anthony



DNTwain.IfThrowException = false;
DNTwain.OpenSourceManager();
DNTwain.IfShowUI = false;
DNTwain.OpenSource();
DNTwain.IfDisableSourceAfterAcquire = true;
DNTwain.MaxImagesInBuffer = 100;
switch (ResolutionDropDown.Text)
{
case "150 dpi":
DNTwain.Resolution = 150;
break;
case "300 dpi":
DNTwain.Resolution = 300;
break;
case "600 dpi":
DNTwain.Resolution = 600;
break;
case "1200 dpi":
DNTwain.Resolution = 1200;
break;
default:
DNTwain.Resolution = 150;
break;
}

switch (DepthDropdown.Text)
{
case "Monochrome":
DNTwain.PixelType = Dynamsoft.DotNet.TWAIN.Enums.TWICapPixelType.TWPT_BW;
DNTwain.BitDepth = 1;
break;
case "Grayscale":
DNTwain.PixelType = Dynamsoft.DotNet.TWAIN.Enums.TWICapPixelType.TWPT_GRAY;
DNTwain.BitDepth = 8;
break;
case "Full Colour (16-bit)":
DNTwain.PixelType = Dynamsoft.DotNet.TWAIN.Enums.TWICapPixelType.TWPT_RGB;
DNTwain.BitDepth = 16;
break;
case "Full Colour (24-bit)":
DNTwain.PixelType = Dynamsoft.DotNet.TWAIN.Enums.TWICapPixelType.TWPT_RGB;
DNTwain.BitDepth = 24;
break;
}

if (ADFCheckbox.IsChecked == true)
{
DNTwain.IfFeederEnabled = true;

}
else
{
DNTwain.IfFeederEnabled = false;
}

DNTwain.AcquireImage();
DNTwain.DisableSource();
DNTwain.CloseSource();
DNTwain.CloseSourceManager();

Hi Anthony,

Please comment out the following lines and try scanning with ADF again to see how it works.

Also, you can call CloseSource in OnPostAllTransfers event, which will be triggered after all transfers end. For more information about this event, please refer to:
http://www.dynamsoft.com/help/TWAIN/.Ne ... nsfers.htm

Thanks.

Hello, those lines weren't there until I tried to fix the issue, I'll try the closing the source in the event and see if that helps.

The strange thing is it's sitting on the set resolution line, like the scanner is in a state that won't accept parameters, which is why I tried adding those lines at the end.

- Anthony

Hi Anthony,

You can contact our support team via LiveHelp to have a GoToMeeting session. With GoToMeeting, you can share your desktop and give us controls of your mouse and keyboard when necessary. Our LiveHelp can be found at:
http://www.dynamsoft.com/support/livehelp.aspx

Thanks.