This tutorial shows how to create a new blank PDF document and add pages to it from existing PDF files in a C# .NET Core application using the LEADTOOLS SDK.
Overview | |
---|---|
Summary | This tutorial covers how to create a new PDF document and add pages to it using LEADTOOLS Document Writers in a C# .NET Core Console application. |
Completion Time | 30 minutes |
Visual Studio Project | Download tutorial project (1 KB) |
Platform | C# .NET Core Console Application |
IDE | Visual Studio 2017, 2019 |
Development License | Download LEADTOOLS |
Try it in another language |
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Get familiar with the basic steps of creating a project by reviewing the Add References and Set a License tutorial, before working on the Create Documents with Document Writers - C# .NET Core tutorial.
Start with a copy of the project created in the Add References and Set a License tutorial. If you do not have that project, follow the steps in that tutorial to create it.
The references needed depend upon the purpose of the project. References can be added via NuGet packages.
This tutorial requires the following NuGet package:
Leadtools.Document.Sdk
For a complete list of which DLL files are required for your application, refer to Files to be Included With Your Application.
The License unlocks the features needed for the project. It must be set before any toolkit function is called. For details, including tutorials for different platforms, refer to Setting a Runtime License.
There are two types of runtime licenses:
Note
Adding LEADTOOLS NuGet references and setting a license are covered in more detail in the Add References and Set a License tutorial.
With the project created, the references added, and the license set, coding can begin.
In the Solution Explorer, open Program.cs
. Add the following statements to the using
block at the top of Program.cs
.
using System;
using System.IO;
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Document.Writer;
Add a new method named CreatePdfDocument()
. Call this new method inside the Main()
method under the set license code. Add the below code to create a new PDF file and add to it the first page of each PDF in a given directory.
static void CreatePdfDocument()
{
using (RasterCodecs codecs = new RasterCodecs())
{
string dir = @"C:\LEADTOOLS21\Resources\Images";
int pageNumber = 1;
string[] pdfFiles = Directory.GetFiles( dir, "*.pdf");
DocumentFormat format = DocumentFormat.Pdf;
string outFile = Path.Combine(dir, "DocumentWriters." + DocumentWriter.GetFormatFileExtension(format));
codecs.Options.RasterizeDocument.Load.Resolution = 300;
DocumentWriter docWriter = new DocumentWriter();
PdfDocumentOptions pdfOptions = docWriter.GetOptions(format) as PdfDocumentOptions;
pdfOptions.DocumentType = PdfDocumentType.PdfA;
pdfOptions.ImageOverText = true;
docWriter.SetOptions(format, pdfOptions);
// Begin a new PDF document
docWriter.BeginDocument(outFile, format);
// Add the pages
foreach (string file in pdfFiles)
{
DocumentWriterSvgPage page = new DocumentWriterSvgPage();
page.SvgDocument = codecs.LoadSvg(file, pageNumber, null);
if (pdfOptions.ImageOverText)
{
// If we are using image/text, then load the overlay raster image
page.Image = codecs.Load(file, pageNumber);
}
// Add the page to the created PDF document
docWriter.AddPage(page);
Console.WriteLine($"Added page {pageNumber} from {Path.GetFileNameWithoutExtension(file)}\n");
// Dispose of resources
if (page.SvgDocument != null)
page.SvgDocument.Dispose();
if (page.Image != null)
page.Image.Dispose();
}
// Finalized document to disk
docWriter.EndDocument();
Console.WriteLine("PDF document saved successfully!");
}
}
Run the project by pressing F5, or by selecting Debug -> Start Debugging.
If the steps were followed correctly, the console appears and the application creates a new PDF file and adds the first page of each PDF file in a given directory using SVG and Document Writers.
This tutorial showed how to create documents using the Document Writers. It also covered how to use the DocumentWriter
, PdfDocumentOptions
, and DocumentWriterSvgPage
classes.