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#1 Posted : Wednesday, July 18, 2007 1:04:26 AM(UTC)


Groups: Registered
Posts: 3


i wloud like if it possible to print string when i scaning the page,  give me if it possible the example.


i use dotnet and leadtools 14.5

my function begin by:

twnSession = new TwainSession();

twnSession.Startup(this, "LEAD Technologies, Inc.", "LEAD Test Applications", "Version 1.0", "TWAIN ");

twnSession.AcquirePage += new TwainAcquirePageEventHandler(twainSession_AcquirePage);



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#2 Posted : Wednesday, July 18, 2007 10:43:11 PM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,326

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If you mean that you want to draw a string on the scanned image and save it, you can do this by handling the TwainSession.AcquirePage Event.
The event handler receives an argument of type TwainAcquirePageEventArgs. The TwainAcquirePageEventArgs have two properties:
- Cancel: Set to true to abort the acquire operation.  
- Image: Gets the IRasterImage which holds the image data acquired from the TWAIN Data Source.  

You can draw a string directly on the scanned image (TwainAcquirePageEventArgs.Image) by using the following code:
Private Sub twainSession_AcquirePage(ByVal sender As Object, ByVal e As TwainAcquirePageEventArgs) Handles twnSession.AcquirePage

Dim G As Graphics
Dim codecs As RasterCodecs

RasterCodecs.CodecsPath = "D:\Program Files\LEAD Technologies, Inc\LEADTOOLS 14.5\Redist\Dotnet\v11"

codecs = New RasterCodecs

RasterImageViewer1.Image = e.Image

G = e.Image.CreateGdiPlusGraphics().Graphics

G.DrawString("LEADTOOLS", New Font("Arial", 40), New SolidBrush(Color.Black), 100, 100)

codecs.Save(e.Image, "c:\Test_Scan.tif", RasterImageFormat.Tif, e.Image.BitsPerPixel, 1, 1, 1, CodecsSavePageMode.Append)

End Sub

Maen Badwan
LEADTOOLS Technical Support
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