編輯PDF文件

using IronPdf;
using System.Drawing;

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("Test");
// Access DOM Objects
var objects = pdf.Pages.First().ObjectModel.TextObjects.First();
// Translate by 100 points right and 100 points down
objects.Translate = new System.Drawing.PointF(100,100);

using IronSoftware;
using System.Drawing; // Required for PointF

// Create a PDF from a URL using a PNG image
string html = @"<img src='https://example.com/logo.png'>";
ChromePdfRenderer renderer = new ChromePdfRenderer();
// Render HTML to PDF
PdfDocument pdf = renderer.RenderHtmlAsPdf(html);
// Access the first image object on the first page
ImageObject image = pdf.Pages.First().ObjectModel.ImageObjects.FirstOrDefault();
// To scale the image to 150% of its original size uniformly
image.Scale = new System.Drawing.PointF(1.5f, 1.5f);
// Save the PDF with the scaled image
pdf.SaveAs("scaled_image.pdf");

using IronSoftware;
using IronSoftware.Pdfium.Dom;
using System.Linq;

// Load a PDF file
PdfDocument pdf = PdfDocument.FromFile("sampleObjectsWithImages.pdf");
// Access DOM Objects
IPdfPageObjectModel objects = pdf.Pages.First().ObjectModel;
// Remove first image
objects.ImageObjects.RemoveAt(0);

using IronPdf;
using System.IO;

PdfDocument pdf = PdfDocument.FromFile("sample.pdf");
// Extract text
string text = pdf.ExtractAllText();
// Export the extracted text to a text file
File.WriteAllText("extractedText.txt", text);

using IronPdf;

PdfDocument pdf = PdfDocument.FromFile("novel.pdf");
// Redact 'Alaric' phrase from all pages
pdf.RedactTextOnAllPages("Alaric");
pdf.SaveAs("redacted.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>.NET6</h1>");
string oldText = ".NET6";
string newText = ".NET7";
// Replace text on all pages
pdf.ReplaceTextOnAllPages(oldText, newText);
pdf.SaveAs("replaceText.pdf");

using IronPdf;
using IronPdf.Annotations;

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Annotation</h1>");
// Create a PDF annotation object on a specified page index
TextAnnotation annotation = new TextAnnotation(0)
{
    Title = "This is the title",
    Contents = "This is the long 'sticky note' comment content...",
    X = 50,
    Y = 700,
};
// Add the annotation
pdf.Annotations.Add(annotation);
pdf.SaveAs("annotation.pdf");

using IronPdf;

using IronPdf.Editing;
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>");
// Create text stamper
TextStamper textStamper = new TextStamper()
{
    Text = "Text Stamper!",
    FontFamily = "Bungee Spice",
    UseGoogleFont = true,
    FontSize = 30,
    IsBold = true,
    IsItalic = true,
    VerticalAlignment = VerticalAlignment.Top,
};
// Stamp the text stamper
pdf.ApplyStamp(textStamper);
pdf.SaveAs("stampText.pdf");

using IronPdf;

string watermarkHtml = @"
<img src='https://ironsoftware.com/img/products/ironpdf-logo-text-dotnet.svg'>
";
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Watermark</h1>");
// Apply watermark
pdf.ApplyWatermark(watermarkHtml);
pdf.SaveAs("watermark.pdf");

using IronPdf;

using IronSoftware.Drawing;
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>testing</h1>");
// Draw text on PDF
pdf.DrawText("Some text", FontTypes.TimesNewRoman.Name, FontSize: 12, PageIndex: 0, X: 100, Y: 100, Color.Black, Rotation: 0);
// Open the image from file
AnyBitmap bitmap = AnyBitmap.FromFile("ironSoftware.png");
// Draw the bitmp on PDF
pdf.DrawBitmap(bitmap, 0, 50, 250, 500, 300);

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>testing</h1>");
// Configure the required parameters
int pageIndex = 0;
var start = new IronSoftware.Drawing.PointF(200,150);
var end = new IronSoftware.Drawing.PointF(1000,150);
int width = 10;
var color = new IronSoftware.Drawing.Color("#000000");
// Draw line on PDF
pdf.DrawLine(pageIndex, start, end, width, color);
pdf.SaveAs("drawLine.pdf");

using IronPdf;
// Instantiate renderer and create PDF
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Hello World!</h1>");
// Create text header
TextHeaderFooter textHeader = new TextHeaderFooter
{
    CenterText = "This is the header!",
};
// Add text header to the PDF
pdf.AddTextHeaders(textHeader);
pdf.SaveAs("addTextHeaderFooter.pdf");

using IronPdf;

// Create text header
TextHeaderFooter textHeader = new TextHeaderFooter()
{
    CenterText = "{page} of {total-pages}"
};
// Render a new PDF
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Hello World!</h1>");
// Add header and footer
pdf.AddTextHeaders(textHeader);
pdf.SaveAs("pdfWithPageNumber.pdf");

using IronPdf;

ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderHtmlAsPdf("<h1>Main HTML content</h1>");
// Render background
PdfDocument background = renderer.RenderHtmlAsPdf("<body style='background-color: cyan;'></body>");
// Render foreground
PdfDocument foreground = renderer.RenderHtmlAsPdf("<h1 style='transform: rotate(-45deg); opacity: 50%;'>Overlay Watermark</h1>");
// Add background
pdf.AddBackgroundPdf(background);
// Overlay foreground
pdf.AddForegroundOverlayPdf(foreground);