How to Access All PDF DOM Objects in C#

using IronPdf;
using System.Linq;

PdfDocument pdf = PdfDocument.FromFile("invoice.pdf");

var glyph = pdf.Pages.First().ObjectModel.TextObjects.First().GetGlyphInfo();

Imports IronPdf
Imports System.Linq

Dim pdf As PdfDocument = PdfDocument.FromFile("invoice.pdf")

Dim glyph = pdf.Pages.First().ObjectModel.TextObjects.First().GetGlyphInfo()

using IronPdf;
using IronSoftware;
using System;
using System.Linq;

// PDFs from surveying and CAD tools often have no layer information.
// Distinguish features by each path's graphics-state attributes instead.
using PdfDocument pdf = new PdfDocument("survey-drawing.pdf");

var paths = pdf.Pages.First().ObjectModel.PathObjects;
foreach (PathObject path in paths)
{
    bool isDashed = path.DashPattern.Count > 0;
    Console.WriteLine(
        $"width={path.StrokeWidth}  cap={path.LineCap}  join={path.LineJoin}  " +
        $"dashed={isDashed}  color={path.StrokeColor}");
}

Imports IronPdf
Imports IronSoftware
Imports System
Imports System.Linq

' PDFs from surveying and CAD tools often have no layer information.
' Distinguish features by each path's graphics-state attributes instead.
Using pdf As New PdfDocument("survey-drawing.pdf")
    Dim paths = pdf.Pages.First().ObjectModel.PathObjects
    For Each path As PathObject In paths
        Dim isDashed As Boolean = path.DashPattern.Count > 0
        Console.WriteLine($"width={path.StrokeWidth}  cap={path.LineCap}  join={path.LineJoin}  " &
                          $"dashed={isDashed}  color={path.StrokeColor}")
    Next
End Using

using IronPdf;
using System.Drawing;
using System.Linq;

// Setup the Renderer
var renderer = new ChromePdfRenderer();

// We use CSS Flexbox to perfectly center the text vertically and horizontally.
var html = @"
<div style='display: flex; justify-content: center; align-items: center; font-size: 48px;'>
    Centered
</div>";

// Render the HTML to a PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html);

// Save the original PDF to see the "before" state
pdf.SaveAs("BeforeTranslate.pdf");

// Access the first text object on the first page
// In this simple HTML, this will be our "Centered" text block.
var textObject = pdf.Pages.First().ObjectModel.TextObjects.First();

// Apply the translation
// This moves the object 200 points to the right and 150 points up from its original position.
textObject.Translate = new PointF(200, 150);

// Save the modified PDF to see the "after" state
pdf.SaveAs("AfterTranslate.pdf");

Imports IronPdf
Imports System.Drawing
Imports System.Linq

' Setup the Renderer
Dim renderer As New ChromePdfRenderer()

' We use CSS Flexbox to perfectly center the text vertically and horizontally.
Dim html As String = "
<div style='display: flex; justify-content: center; align-items: center; font-size: 48px;'>
    Centered
</div>"

' Render the HTML to a PDF
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(html)

' Save the original PDF to see the "before" state
pdf.SaveAs("BeforeTranslate.pdf")

' Access the first text object on the first page
' In this simple HTML, this will be our "Centered" text block.
Dim textObject = pdf.Pages.First().ObjectModel.TextObjects.First()

' Apply the translation
' This moves the object 200 points to the right and 150 points up from its original position.
textObject.Translate = New PointF(200, 150)

' Save the modified PDF to see the "after" state
pdf.SaveAs("AfterTranslate.pdf")

using IronPdf;
using System.Linq;

// Setup the Renderer
var renderer = new ChromePdfRenderer();

// The image is placed in a div to give it some space on the page.
string html = @"<img src='https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTi8LuOR6_A98euPLs-JRwoLU7Nc31nVP15rw&s'>";

// Render the HTML to a PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html);

// Save the PDF before scaling for comparison
pdf.SaveAs("BeforeScale.pdf");

// Access the first image object on the first page
var image = pdf.Pages.First().ObjectModel.ImageObjects.First();

// We scale the image to 70% of its original size on both the X and Y axes.
image.Scale = new System.Drawing.PointF(0.7f, 0.7f);

// Save the modified PDF to see the result
pdf.SaveAs("AfterScale.pdf");

Imports IronPdf
Imports System.Linq
Imports System.Drawing

' Setup the Renderer
Dim renderer As New ChromePdfRenderer()

' The image is placed in a div to give it some space on the page.
Dim html As String = "<img src='https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcTi8LuOR6_A98euPLs-JRwoLU7Nc31nVP15rw&s'>"

' Render the HTML to a PDF
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(html)

' Save the PDF before scaling for comparison
pdf.SaveAs("BeforeScale.pdf")

' Access the first image object on the first page
Dim image = pdf.Pages.First().ObjectModel.ImageObjects.First()

' We scale the image to 70% of its original size on both the X and Y axes.
image.Scale = New PointF(0.7F, 0.7F)

' Save the modified PDF to see the result
pdf.SaveAs("AfterScale.pdf")

// Example: Selective content modification based on criteria
using IronPdf;
using System.Linq;

PdfDocument report = PdfDocument.FromFile("quarterly-report.pdf");

foreach (var page in report.Pages)
{
    var textObjects = page.ObjectModel.TextObjects;

    // Highlight negative values in financial reports
    foreach (var text in textObjects)
    {
        if (text.Contents.StartsWith("-$") || text.Contents.Contains("Loss"))
        {
            text.FillColor = IronSoftware.Drawing.Color.Red;
        }
    }
}

report.SaveAs("highlighted-report.pdf");

Imports IronPdf
Imports System.Linq

Dim report As PdfDocument = PdfDocument.FromFile("quarterly-report.pdf")

For Each page In report.Pages
    Dim textObjects = page.ObjectModel.TextObjects

    ' Highlight negative values in financial reports
    For Each text In textObjects
        If text.Contents.StartsWith("-$") OrElse text.Contents.Contains("Loss") Then
            text.FillColor = IronSoftware.Drawing.Color.Red
        End If
    Next
Next

report.SaveAs("highlighted-report.pdf")