編輯PDF

利用我們無數的功能構建在現有的PDF文件上，最終成為完美的輸出文件。

精確編輯PDF物件

翻譯PDF物件

精確地移動和定位PDF物件，如圖像、文字和形狀，確保元素在您的文件中正確對齊和放置。

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 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);

Imports IronPdf
Imports System.Drawing

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("Test")
' Access DOM Objects
Dim objects = pdf.Pages.First().ObjectModel.TextObjects.First()
' Translate by 100 points right and 100 points down
objects.Translate = New System.Drawing.PointF(100, 100)

縮放PDF物件

調整PDF物件的大小以滿足您的設計需要。縮放圖像、文字或其他元素以實現所需的外觀，而不失品質。

學習如何：縮放PDF DOM物件

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 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");

Imports IronSoftware
Imports System.Drawing ' Required for PointF

' Create a PDF from a URL using a PNG image
Dim html As String = "<img src='https://example.com/logo.png'>"
Dim renderer As New ChromePdfRenderer()
' Render HTML to PDF
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf(html)
' Access the first image object on the first page
Dim image As ImageObject = 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")

移除PDF物件

從您的文件中刪除不需要的或不必要的PDF物件，以清理和簡化內容。

學習如何：移除PDF DOM物件

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 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);

Imports IronSoftware
Imports IronSoftware.Pdfium.Dom
Imports System.Linq

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

一次修改多個文字片段

提取PDF文字和圖像

從您的PDF文件中提取文字和圖像，使內容可以輕鬆地重複使用或再用於其他文件或應用程式。

學習如何：提取文字和圖像

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;
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);

Imports IronPdf
Imports System.IO

Dim pdf As PdfDocument = PdfDocument.FromFile("sample.pdf")
' Extract text
Dim text As String = pdf.ExtractAllText()
' Export the extracted text to a text file
File.WriteAllText("extractedText.txt", text)

刪除文字

透過在您的PDF中刪除文字來保護敏感資訊。永久移除或遮蔽文字，以保持文件的機密性。

學習如何：刪除文字

using IronPdf;

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

using IronPdf;

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

Imports IronPdf

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

查找和替換文字

之後進行快速地在整個PDF文件中查找並替換文字，使內容更新和修正高效且無錯。

學習如何：查找並替換文字

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;

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");

Imports IronPdf

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>.NET6</h1>")
Dim oldText As String = ".NET6"
Dim newText As String = ".NET7"
' Replace text on all pages
pdf.ReplaceTextOnAllPages(oldText, newText)
pdf.SaveAs("replaceText.pdf")

主張強大的PDF設計增強

註釋

在您的PDF文件中新增註釋，如評論、突出顯示或筆記，以提供額外的上下文或強調特定的部分。

學習如何：控制PDF註釋

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.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");

Imports IronPdf
Imports IronPdf.Annotations

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Annotation</h1>")
' Create a PDF annotation object on a specified page index
Dim annotation As New TextAnnotation(0) With {
    .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")

蓋印文字和圖像

在您的PDF中應用自訂文字或圖像戳記，用於品牌、批准或特殊標記，增強文件的專業性和清晰度。

學習如何：蓋印文字和圖像

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;

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");

Imports IronPdf
Imports IronPdf.Editing

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Example HTML Document!</h1>")
' Create text stamper
Dim textStamper As New TextStamper() With {
    .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")

自訂浮水印

建立並應用自訂浮水印到您的PDF文件中，以將其標記為草稿、機密或新增品牌元素。

學習如何：建立浮水印

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;

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");

Imports IronPdf

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

畫文字和位圖

新增自訂文字和位圖圖像到您的PDF中，讓您自由地根據文件的需求來包含獨特的內容元素。

學習如何：畫文字和位圖

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;

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);

Imports IronPdf
Imports IronSoftware.Drawing

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>testing</h1>")
' Draw text on PDF
pdf.DrawText("Some text", FontTypes.TimesNewRoman.Name, 12, 0, 100, 100, Color.Black, 0)
' Open the image from file
Dim bitmap As AnyBitmap = AnyBitmap.FromFile("ironSoftware.png")
' Draw the bitmap on PDF
pdf.DrawBitmap(bitmap, 0, 50, 250, 500, 300)

劃線和矩形

插入線條和矩形到您的PDF中以結構化內容、強調某些部分或建立圖表。

學習如何：轉換矩形

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;

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");

Imports IronPdf

Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>testing</h1>")
' Configure the required parameters
Dim pageIndex As Integer = 0
Dim start = New IronSoftware.Drawing.PointF(200, 150)
Dim [end] = New IronSoftware.Drawing.PointF(1000, 150)
Dim width As Integer = 10
Dim color = New IronSoftware.Drawing.Color("#000000")
' Draw line on PDF
pdf.DrawLine(pageIndex, start, [end], width, color)
pdf.SaveAs("drawLine.pdf")

新增標頭/頁腳

將自訂標頭和頁腳結合進您的PDF中，帶有文字、圖像或HTML元素，建立一致且專業的外觀。

學習如何：新增標頭/頁腳

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;
// 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");

Imports IronPdf
' Instantiate renderer and create PDF
Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderHtmlAsPdf("<h1>Hello World!</h1>")
' Create text header
Dim textHeader As New TextHeaderFooter With {
    .CenterText = "This is the header!"
}
' Add text header to the PDF
pdf.AddTextHeaders(textHeader)
pdf.SaveAs("addTextHeaderFooter.pdf")

新增頁碼

將頁碼插入到您的PDF中，根據您的格式偏好設定其位置，以保持有條理的文件結構。

學習如何：新增頁碼

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;

// 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");

Imports IronPdf

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

背景和前景

控制您的PDF中的背景和前景元素，以突出顯示特定內容、增強可讀性或增加視覺吸引力。

學習如何：新增背景和前景

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);

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);

Imports IronPdf

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