使用 C# 将富文本格式（RTF）转换为 PDF

using IronPdf;

// Instantiate Renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();

// RTF string
string rtf = @"{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}{\colortbl;\red0\green0\blue0;}\cf0This is some \b bold \b0 and \i italic \i0 text.}";

// Render from RTF string
PdfDocument pdf = renderer.RenderRtfStringAsPdf(rtf);

// Save the PDF
pdf.SaveAs("pdfFromRtfString.pdf");

Imports IronPdf

' Instantiate Renderer
Private renderer As New ChromePdfRenderer()

' RTF string
Private rtf As String = "{\rtf1\ansi\deff0{\fonttbl{\f0 Arial;}}{\colortbl;\red0\green0\blue0;}\cf0This is some \b bold \b0 and \i italic \i0 text.}"

' Render from RTF string
Private pdf As PdfDocument = renderer.RenderRtfStringAsPdf(rtf)

' Save the PDF
pdf.SaveAs("pdfFromRtfString.pdf")

using IronPdf;
using IronPdf.Rendering;

// Create renderer with custom options
ChromePdfRenderer renderer = new ChromePdfRenderer();
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape;
renderer.RenderingOptions.MarginTop = 50;
renderer.RenderingOptions.MarginBottom = 50;
renderer.RenderingOptions.MarginLeft = 25;
renderer.RenderingOptions.MarginRight = 25;

// RTF string with formatting
string rtf = @"{\rtf1\ansi\deff0{\fonttbl{\f0 Times New Roman;}{\f1 Arial;}}
{\colortbl;\red255\green0\blue0;\red0\green0\blue255;}
\f0\fs24 This is a heading\line
\f1\fs20\cf1 This text is red\line
\cf2 This text is blue\line
\b Bold text\b0 and \i italic text\i0}";

// Convert with custom options
PdfDocument pdf = renderer.RenderRtfStringAsPdf(rtf);
pdf.SaveAs("formattedRtfToPdf.pdf");

Imports IronPdf
Imports IronPdf.Rendering

' Create renderer with custom options
Dim renderer As New ChromePdfRenderer()
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape
renderer.RenderingOptions.MarginTop = 50
renderer.RenderingOptions.MarginBottom = 50
renderer.RenderingOptions.MarginLeft = 25
renderer.RenderingOptions.MarginRight = 25

' RTF string with formatting
Dim rtf As String = "{\rtf1\ansi\deff0{\fonttbl{\f0 Times New Roman;}{\f1 Arial;}}" & vbCrLf &
                    "{\colortbl;\red255\green0\blue0;\red0\green0\blue255;}" & vbCrLf &
                    "\f0\fs24 This is a heading\line" & vbCrLf &
                    "\f1\fs20\cf1 This text is red\line" & vbCrLf &
                    "\cf2 This text is blue\line" & vbCrLf &
                    "\b Bold text\b0 and \i italic text\i0}"

' Convert with custom options
Dim pdf As PdfDocument = renderer.RenderRtfStringAsPdf(rtf)
pdf.SaveAs("formattedRtfToPdf.pdf")

using IronPdf;

// Instantiate Renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Render from RTF file
PdfDocument pdf = renderer.RenderRtfFileAsPdf("sample.rtf");

// Save the PDF
pdf.SaveAs("pdfFromRtfFile.pdf");

Imports IronPdf

' Instantiate Renderer
Private renderer As New ChromePdfRenderer()

' Render from RTF file
Private pdf As PdfDocument = renderer.RenderRtfFileAsPdf("sample.rtf")

' Save the PDF
pdf.SaveAs("pdfFromRtfFile.pdf")

using IronPdf;
using System.IO;

// Create renderer once for efficiency
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Get all RTF files in directory
string[] rtfFiles = Directory.GetFiles(@"C:\RTFDocuments", "*.rtf");

foreach (string rtfFile in rtfFiles)
{
    // Convert each RTF file to PDF
    PdfDocument pdf = renderer.RenderRtfFileAsPdf(rtfFile);

    // Save with same name but PDF extension
    string pdfPath = Path.ChangeExtension(rtfFile, ".pdf");
    pdf.SaveAs(pdfPath);
}

Imports IronPdf
Imports System.IO

' Create renderer once for efficiency
Dim renderer As New ChromePdfRenderer()

' Get all RTF files in directory
Dim rtfFiles As String() = Directory.GetFiles("C:\RTFDocuments", "*.rtf")

For Each rtfFile As String In rtfFiles
    ' Convert each RTF file to PDF
    Dim pdf As PdfDocument = renderer.RenderRtfFileAsPdf(rtfFile)

    ' Save with same name but PDF extension
    Dim pdfPath As String = Path.ChangeExtension(rtfFile, ".pdf")
    pdf.SaveAs(pdfPath)
Next rtfFile

using IronPdf;
using IronPdf.Security;

// Convert RTF to PDF
ChromePdfRenderer renderer = new ChromePdfRenderer();
PdfDocument pdf = renderer.RenderRtfFileAsPdf("confidential.rtf");

// Apply security settings
pdf.SecuritySettings.RemovePasswordsAndEncryption();
pdf.SecuritySettings.MakePdfDocumentReadOnly("owner_password");
pdf.SecuritySettings.SetUserPassword("user_password");
pdf.SecuritySettings.AllowUserCopyPasteContent = false;
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint;

// Save secured PDF
pdf.SaveAs("secured_document.pdf");

Imports IronPdf
Imports IronPdf.Security

' Convert RTF to PDF
Dim renderer As New ChromePdfRenderer()
Dim pdf As PdfDocument = renderer.RenderRtfFileAsPdf("confidential.rtf")

' Apply security settings
pdf.SecuritySettings.RemovePasswordsAndEncryption()
pdf.SecuritySettings.MakePdfDocumentReadOnly("owner_password")
pdf.SecuritySettings.SetUserPassword("user_password")
pdf.SecuritySettings.AllowUserCopyPasteContent = False
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.NoPrint

' Save secured PDF
pdf.SaveAs("secured_document.pdf")

using IronPdf;
using System.Collections.Generic;

// Create renderer
ChromePdfRenderer renderer = new ChromePdfRenderer();

// Convert multiple RTF files
List<PdfDocument> pdfs = new List<PdfDocument>();
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter1.rtf"));
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter2.rtf"));
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter3.rtf"));

// Merge PDFs
PdfDocument mergedPdf = PdfDocument.Merge(pdfs);

// Add page numbers
for (int i = 0; i < mergedPdf.PageCount; i++)
{
    mergedPdf.AddTextFooter($"Page {i + 1} of {mergedPdf.PageCount}", 
        FontFamily.Arial, 12);
}

// Save combined document
mergedPdf.SaveAs("combined_document.pdf");

// Clean up individual PDFs
foreach (var pdf in pdfs)
{
    pdf.Dispose();
}

Imports IronPdf
Imports System.Collections.Generic

' Create renderer
Dim renderer As New ChromePdfRenderer()

' Convert multiple RTF files
Dim pdfs As New List(Of PdfDocument)()
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter1.rtf"))
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter2.rtf"))
pdfs.Add(renderer.RenderRtfFileAsPdf("chapter3.rtf"))

' Merge PDFs
Dim mergedPdf As PdfDocument = PdfDocument.Merge(pdfs)

' Add page numbers
For i As Integer = 0 To mergedPdf.PageCount - 1
    mergedPdf.AddTextFooter($"Page {i + 1} of {mergedPdf.PageCount}", FontFamily.Arial, 12)
Next

' Save combined document
mergedPdf.SaveAs("combined_document.pdf")

' Clean up individual PDFs
For Each pdf In pdfs
    pdf.Dispose()
Next

[HttpGet]
public IActionResult ConvertRtfToPdf(string rtfContent)
{
    // Create renderer
    ChromePdfRenderer renderer = new ChromePdfRenderer();

    // Convert RTF string to PDF
    PdfDocument pdf = renderer.RenderRtfStringAsPdf(rtfContent);

    // Return as file download
    byte[] pdfBytes = pdf.BinaryData;
    return File(pdfBytes, "application/pdf", "converted_document.pdf");
}

<AttributeUsage(AttributeTargets.Method)>
Public Class HttpGetAttribute
    Inherits Attribute
End Class

<HttpGet>
Public Function ConvertRtfToPdf(rtfContent As String) As IActionResult
    ' Create renderer
    Dim renderer As New ChromePdfRenderer()

    ' Convert RTF string to PDF
    Dim pdf As PdfDocument = renderer.RenderRtfStringAsPdf(rtfContent)

    ' Return as file download
    Dim pdfBytes As Byte() = pdf.BinaryData
    Return File(pdfBytes, "application/pdf", "converted_document.pdf")
End Function