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RtfDocumentOptions Class
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Leadtools.Forms.DocumentWriters Namespace : RtfDocumentOptions Class



The RtfDocumentOptions Class is available as an add-on to the LEADTOOLS Document and Medical Imaging toolkits.

Provides extra options to use when saving a document using the Microsoft Rich Text Format (RTF).

Object Model

RtfDocumentOptions Class

Syntax

Visual Basic (Declaration) 
Public Class RtfDocumentOptions 
   Inherits DocumentOptions
Visual Basic (Usage)Copy Code
Dim instance As RtfDocumentOptions
C# 
public class RtfDocumentOptions : DocumentOptions 
C++/CLI 
public ref class RtfDocumentOptions : public DocumentOptions 

Example

This example will create a new HyperText Markup Language document (RTF) file using the various supported options.

Visual BasicCopy Code
' Windows API functions needed to load/delete an EMF
   <DllImport("gdi32.dll")> _
   Private Shared Function GetEnhMetaFile(ByVal lpszMetaFile As String) As IntPtr
   End Function
   <DllImport("gdi32.dll")> _
   Private Shared Function DeleteEnhMetaFile(ByVal hemf As IntPtr) As Boolean
   End Function

   Private Sub RtfDocumentOptionsExample()
      ' Unlock the support needed for LEADTOOLS Document Writers (with PDF output)
      RasterSupport.Unlock(RasterSupportType.DocumentWriters, "Replace with your own key here")

      ' Create a new instance of the LEADTOOLS Document Writer
      Dim docWriter As New DocumentWriter()

      Dim outputFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Test.rtf")
      Dim emfFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.emf")

      ' Change the RTF options to add frames to the file
      dim rtfOptions as RtfDocumentOptions = directcast(docWriter.GetOptions(DocumentFormat.Rtf) , RtfDocumentOptions)
      rtfOptions.Framed = True

      docWriter.SetOptions(DocumentFormat.Rtf, rtfOptions)

      ' Create a new RTF document
      Console.WriteLine("Creating new RTF document: {0}", outputFileName)
      docWriter.BeginDocument(outputFileName, DocumentFormat.Rtf)

      ' Use the Windows API to load the EMF
      Dim emfHandle As IntPtr = GetEnhMetaFile(emfFileName)

      ' Add the page
      Dim page As DocumentPage = DocumentPage.Empty
      page.EmfHandle = emfHandle
      page.Image = Nothing

      Console.WriteLine("Adding EMF page from: {0}", emfFileName)
      docWriter.AddPage(page)

      ' Use the Windows API to delete the EMF
      DeleteEnhMetaFile(emfHandle)

      ' Finally finish writing the RTF file on disk
      docWriter.EndDocument()
   End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
C#Copy Code
// Windows API functions needed to load/delete an EMF
   [DllImport("gdi32.dll")]
   private static extern IntPtr GetEnhMetaFile(string lpszMetaFile);
   [DllImport("gdi32.dll")]
   private static extern bool DeleteEnhMetaFile(IntPtr hemf);
   private void RtfDocumentOptionsExample()
   {
      // Unlock the support needed for LEADTOOLS Document Writers (with PDF output)
      RasterSupport.Unlock(RasterSupportType.DocumentWriters, "Replace with your own key here");

      // Create a new instance of the LEADTOOLS Document Writer
      DocumentWriter docWriter = new DocumentWriter();

      string outputFileName = Path.Combine(LEAD_VARS.ImagesDir, "Test.rtf");
      string emfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.emf");

      // Change the RTF options to add frames to the file
      RtfDocumentOptions rtfOptions = docWriter.GetOptions(DocumentFormat.Rtf) as RtfDocumentOptions;
      rtfOptions.Framed = true;

      docWriter.SetOptions(DocumentFormat.Rtf, rtfOptions);

      // Create a new RTF document
      Console.WriteLine("Creating new RTF document: {0}", outputFileName);
      docWriter.BeginDocument(outputFileName, DocumentFormat.Rtf);

      // Use the Windows API to load the EMF
      IntPtr emfHandle = GetEnhMetaFile(emfFileName);

      // Add the page
      DocumentPage page = DocumentPage.Empty;
      page.EmfHandle = emfHandle;
      page.Image = null;

      Console.WriteLine("Adding EMF page from: {0}", emfFileName);
      docWriter.AddPage(page);

      // Use the Windows API to delete the EMF
      DeleteEnhMetaFile(emfHandle);

      // Finally finish writing the RTF file on disk
      docWriter.EndDocument();
   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Remarks

The options set in the RtfDocumentOptions class will be used when the user saves a document using the DocumentFormat.Rtf format.

To change the options used with the RTF format, perform the following steps:

  1. Use the DocumentWriter.GetOptions method of the DocumentWriter object being used. Passing DocumentFormat.Rtf to the format parameter. Note that the resulting object from the base DocumentOptions class needs to be cast to RtfDocumentOptions.
  2. Use the various RtfDocumentOptions properties to change the options.
  3. Use DocumentWriter.SetOptions to set the new options in the engine.
  4. Now you can call the DocumentWriter.BeginDocument method (with DocumentFormat.Rtf for the format parameter) to create a new document and add the pages.

The RtfDocumentOptions class contains the following properties:

Property Description
RtfDocumentOptions.Framed Turn off or on the option to put the text blocks inside a frame (text box object) in the resulting RTF file.

Inheritance Hierarchy

System.Object
   Leadtools.Forms.DocumentWriters.DocumentOptions
      Leadtools.Forms.DocumentWriters.RtfDocumentOptions

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7

See Also

Leadtools.Forms.DocumentWriters requires a Document or Medical toolkit license and unlock key. For more information, refer to: Imaging Pro/Document/Medical Features