如何使用 IronPDF 和 C# 重制 PDF 中的文本和区域

using IronPdf;

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

// Redact with custom parameters
pdf.RedactTextOnAllPages("SSN: 123-45-6789", 
    caseSensitive: true, 
    onlyMatchWholeWords: false, 
    drawRectangles: true, 
    replacementText: "[REDACTED]");

// Redact multiple sensitive items
string[] sensitiveTerms = { "salary", "password", "credit card" };
foreach (string term in sensitiveTerms)
{
    pdf.RedactTextOnAllPages(term, caseSensitive: false);
}

pdf.SaveAs("fully_redacted_report.pdf");

Imports IronPdf

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

' Redact with custom parameters
pdf.RedactTextOnAllPages("SSN: 123-45-6789", 
                         caseSensitive:=True, 
                         onlyMatchWholeWords:=False, 
                         drawRectangles:=True, 
                         replacementText:="[REDACTED]")

' Redact multiple sensitive items
Dim sensitiveTerms As String() = {"salary", "password", "credit card"}
For Each term As String In sensitiveTerms
    pdf.RedactTextOnAllPages(term, caseSensitive:=False)
Next

pdf.SaveAs("fully_redacted_report.pdf")

using IronPdf;
using IronSoftware.Drawing;
using System.Collections.Generic;

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

// Redact multiple regions
List<RectangleF> regionsToRedact = new List<RectangleF>
{
    new RectangleF(100, 200, 200, 50),  // Signature area
    new RectangleF(100, 300, 200, 100), // Address block
    new RectangleF(350, 150, 150, 150)  // Photo ID area
};

foreach (var region in regionsToRedact)
{
    pdf.RedactRegionsOnAllPages(region);
}

// Redact regions on specific pages only
pdf.RedactRegionOnPage(0, new RectangleF(50, 50, 100, 30)); // Page 1 header
pdf.RedactRegionOnPages(new[] { 2, 3, 4 }, new RectangleF(400, 700, 150, 50)); // Footer on pages 3-5

pdf.SaveAs("form_redacted.pdf");

Imports IronPdf
Imports IronSoftware.Drawing
Imports System.Collections.Generic

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

' Redact multiple regions
Dim regionsToRedact As New List(Of RectangleF) From {
    New RectangleF(100, 200, 200, 50),  ' Signature area
    New RectangleF(100, 300, 200, 100), ' Address block
    New RectangleF(350, 150, 150, 150)  ' Photo ID area
}

For Each region In regionsToRedact
    pdf.RedactRegionsOnAllPages(region)
Next

' Redact regions on specific pages only
pdf.RedactRegionOnPage(0, New RectangleF(50, 50, 100, 30)) ' Page 1 header
pdf.RedactRegionOnPages(New Integer() {2, 3, 4}, New RectangleF(400, 700, 150, 50)) ' Footer on pages 3-5

pdf.SaveAs("form_redacted.pdf")