Build PDFs with Marked Content in C# and .NET
Marked-up PDF content is content that is either nearby (if the markup type is a dot) or in the environment (if the markup type is an element of the beginning and end of the markup). The PDF markup element defines a tag that indicates the role or importance of the published content and, if necessary, defines the properties of the marked-up content.
Marked-up content is useful for:
- Improving accessibility: Helps screen readers and other assistive technologies better interpret PDF content.
- Simplified navigation: Allows users and programs to easily find important parts of the document and navigate to them.
- Semantic markup: provides additional information about the structure and content of the document.
- Add SautinSoft.PDF from NuGet.
- Create a new PDF document and add a page.
- Create a path that visually represents the letter 'H'.
- Apply the format settings for the path (line thickness).
- Apply an element of the end of the markup.
- Save the document.
Output result:
Complete code
GitHubusing System;
using System.IO;
using SautinSoft;
using SautinSoft.Pdf;
using SautinSoft.Pdf.Content;
using SautinSoft.Pdf.Content.Marked;
using SautinSoft.Pdf.Objects;
namespace Sample
{
class Sample
{
/// <summary>
/// Create PDF marked content.
/// </summary>
/// <remarks>
/// Details: https://sautinsoft.com/products/pdf/help/net/developer-guide/marked-content.php
/// </remarks>
static void Main(string[] args)
{
// Before starting this example, please get a free 100-day trial key:
// https://sautinsoft.com/start-for-free/
// Apply the key here:
// PdfDocument.SetLicense("...");
using (var document = new PdfDocument())
{
var page = document.Pages.Add();
// Surround the path with the marked content start and marked content end elements.
var markStart = page.Content.Elements.AddMarkStart(new PdfContentMarkTag(PdfContentMarkTagRole.Span));
var markedProperties = markStart.GetEditableProperties().GetDictionary();
// Add the path that is a visual representation of the letter 'H'.
var path = page.Content.Elements.AddPath()
.BeginSubpath(100, 600).LineTo(100, 800)
.BeginSubpath(100, 700).LineTo(200, 700)
.BeginSubpath(200, 600).LineTo(200, 800);
var format = path.Format;
format.Stroke.IsApplied = true;
format.Stroke.Width = 10;
page.Content.Elements.AddMarkEnd();
document.Save("MarkedContent.pdf");
}
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo("MarkedContent.pdf") { UseShellExecute = true });
}
}
}
Option Infer On
Imports System
Imports System.IO
Imports SautinSoft
Imports SautinSoft.Pdf
Imports SautinSoft.Pdf.Content
Imports SautinSoft.Pdf.Content.Marked
Imports SautinSoft.Pdf.Objects
Namespace Sample
Friend Class Sample
''' <summary>
''' Create PDF marked content.
''' </summary>
''' <remarks>
''' Details: https://sautinsoft.com/products/pdf/help/net/developer-guide/marked-content.php
''' </remarks>
Shared Sub Main(ByVal args() As String)
' Before starting this example, please get a free 100-day trial key:
' https://sautinsoft.com/start-for-free/
' Apply the key here:
' PdfDocument.SetLicense("...");
Using document = New PdfDocument()
Dim page = document.Pages.Add()
' Surround the path with the marked content start and marked content end elements.
Dim markStart = page.Content.Elements.AddMarkStart(New PdfContentMarkTag(PdfContentMarkTagRole.Span))
Dim markedProperties = markStart.GetEditableProperties().GetDictionary()
' Add the path that is a visual representation of the letter 'H'.
Dim path = page.Content.Elements.AddPath().BeginSubpath(100, 600).LineTo(100, 800).BeginSubpath(100, 700).LineTo(200, 700).BeginSubpath(200, 600).LineTo(200, 800)
Dim format = path.Format
format.Stroke.IsApplied = True
format.Stroke.Width = 10
page.Content.Elements.AddMarkEnd()
document.Save("MarkedContent.pdf")
End Using
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo("MarkedContent.pdf") With {.UseShellExecute = True})
End Sub
End Class
End Namespace
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