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ExportPage(Int32,Stream,RasterImageFormat,Int32) Method
See Also  Example
Leadtools.Forms.Ocr Namespace > IOcrPageCollection Interface > ExportPage Method : ExportPage(Int32,Stream,RasterImageFormat,Int32) Method



pageIndex
The zero-based index of the page to export.
stream
The .NET stream to save the page to.
format
The image file format to use.
bitsPerPixel
The bits/pixel value of the result image file.
pageIndex
The zero-based index of the page to export.
stream
The .NET stream to save the page to.
format
The image file format to use.
bitsPerPixel
The bits/pixel value of the result image file.
Export the page at the specified index to a .NET stream.

Syntax

Visual Basic (Declaration) 
Overloads Overridable Sub ExportPage( _
   ByVal pageIndex As Integer, _
   ByVal stream As Stream, _
   ByVal format As RasterImageFormat, _
   ByVal bitsPerPixel As Integer _
)
Visual Basic (Usage)Copy Code
Dim instance As IOcrPageCollection
Dim pageIndex As Integer
Dim stream As Stream
Dim format As RasterImageFormat
Dim bitsPerPixel As Integer
 
instance.ExportPage(pageIndex, stream, format, bitsPerPixel)
C# 
virtual void ExportPage( 
   int pageIndex,
   Stream stream,
   RasterImageFormat format,
   int bitsPerPixel
)
C++/CLI 
virtual void ExportPage( 
   int pageIndex,
   Stream^ stream,
   RasterImageFormat format,
   int bitsPerPixel
)

Parameters

pageIndex
The zero-based index of the page to export.
stream
The .NET stream to save the page to.
format
The image file format to use.
bitsPerPixel
The bits/pixel value of the result image file.

Example

Visual BasicCopy Code
Public Sub ExportPageToStream()
   ' Unlock the support needed for LEADTOOLS Plus OCR engine
   RasterSupport.Unlock(RasterSupportType.Document, "Replace with your own key here")
   RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here")
   RasterSupport.Unlock(RasterSupportType.OcrPlusPdfLeadOutput, "Replace with your own key here")
   Dim tifFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "Ocr1.tif"
   Dim exportedFileName As String = LeadtoolsExamples.Common.ImagesPath.Path + "OcrExported.jpg"

   ' Create an instance of the engine
   Using ocrEngine As IOcrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, False)
      ' Since we have a RasterCodecs object, re-use it in the OCR engine. Although
      ' this demo will not use it, it is always a good practice
      ocrEngine.Startup(Nothing, Nothing, Nothing, Nothing)

      ' Create an OCR document
      Using ocrDocument As IOcrDocument = ocrEngine.DocumentManager.CreateDocument()

         ' Add the image to the document
         ocrDocument.Pages.AddPage(tifFileName, Nothing)

         ' Save it to a file stream
         Using fs As FileStream = File.Create(exportedFileName)
            ocrDocument.Pages.ExportPage(0, fs, RasterImageFormat.Jpeg, 0)
         End Using

      End Using

      ' Shutdown the engine
      ' Note: calling Dispose will also automatically shutdown the engine if it has been started
      ocrEngine.Shutdown()
   End Using
End Sub
C#Copy Code
public void ExportPageToStream() 
{ 
   // Unlock the support needed for LEADTOOLS Plus OCR engine 
   RasterSupport.Unlock(RasterSupportType.Document, "Replace with your own key here"); 
   RasterSupport.Unlock(RasterSupportType.OcrPlus, "Replace with your own key here"); 
   RasterSupport.Unlock(RasterSupportType.OcrPlusPdfLeadOutput, "Replace with your own key here"); 
   string tifFileName = LeadtoolsExamples.Common.ImagesPath.Path + "Ocr1.tif"; 
   string exportedFileName = LeadtoolsExamples.Common.ImagesPath.Path + "OcrExported.jpg"; 
 
   // Create an instance of the engine 
   using(IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.Plus, false)) 
   { 
      // Since we have a RasterCodecs object, re-use it in the OCR engine. Although 
      // this demo will not use it, it is always a good practice 
      ocrEngine.Startup(null, null, null, null); 
 
      // Create an OCR document 
      using(IOcrDocument ocrDocument = ocrEngine.DocumentManager.CreateDocument()) 
      { 
         // Add the image to the document 
         ocrDocument.Pages.AddPage(tifFileName, null); 
 
         // Save it to a file stream 
         using(FileStream fs = File.Create(exportedFileName)) 
         { 
            ocrDocument.Pages.ExportPage(0, fs, RasterImageFormat.Jpeg, 0); 
         } 
      } 
 
      // Shutdown the engine 
      // Note: calling Dispose will also automatically shutdown the engine if it has been started 
      ocrEngine.Shutdown(); 
   } 
}

Remarks

To export more than one page to a multi-page file to a stream, use ExportPages(int firstPageIndex, int lastPageIndex, Stream stream, RasterImageFormat format, int bitsPerPixel, int firstSavePageNumber, CodecsSavePageMode pageMode).

You can export the page to any of the file formats supported by LEADTOOLS. For more information, refer to Summary of All Supported Image File Formats.

Requirements

Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family

See Also

ExportPage(Int32,Stream,RasterImageFormat,Int32) requires an OCR module license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features