The EmfDocumentOptions 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 Windows Enhanced Meta File (EMF) format.Visual Basic (Declaration) | |
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Public Class EmfDocumentOptions Inherits DocumentOptions |
Visual Basic (Usage) | Copy Code |
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Dim instance As EmfDocumentOptions |
C# | |
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public class EmfDocumentOptions : DocumentOptions |
C++/CLI | |
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public ref class EmfDocumentOptions : public DocumentOptions |
This example will create a new Windows Enhanced Meta File (EMF) file using the various supported options.
Visual Basic | Copy Code |
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' 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 EmfDocumentOptionsExample() ' 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.emf") Dim emfFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.emf") ' Create a new EMF document Console.WriteLine("Creating new EMF document: {0}", outputFileName) docWriter.BeginDocument(outputFileName, DocumentFormat.Emf) ' 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 PDF 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 |
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// 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 EmfDocumentOptionsExample() { // 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.emf"); string emfFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.emf"); // Create a new EMF document Console.WriteLine("Creating new EMF document: {0}", outputFileName); docWriter.BeginDocument(outputFileName, DocumentFormat.Emf); // 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 PDF file on disk docWriter.EndDocument(); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
The Windows Enhanced Meta File (EMF) format does not support multi-page documents. Therefore, only the last page added with the DocumentWriter.AddPage will be used in the final document.
The options set in the EmfDocumentOptions class will be used when the user saves a document using the DocumentFormat.Emf format.
To change the options used with the EMF format, perform the following steps:
- Use the DocumentWriter.GetOptions method of the DocumentWriter object being used. Passing DocumentFormat.Emf to the format parameter. Note that the resulting object from the base DocumentOptions class needs to be cast to EmfDocumentOptions.
- Use the various EmfDocumentOptions properties to change the options.
- Use DocumentWriter.SetOptions to set the new options in the engine.
- Now you can call the DocumentWriter.BeginDocument method (with DocumentFormat.Emf for the format parameter) to create a new document and add the pages.
Currently, the EmfDocumentOptions class contains no extra options.
System.Object
Leadtools.Forms.DocumentWriters.DocumentOptions
Leadtools.Forms.DocumentWriters.EmfDocumentOptions
Target Platforms: Microsoft .NET Framework 2.0, Windows 2000, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7