在C# .NET库中创建PDF

# Use the NuGet package manager to install IronPDF
nuget install IronPdf

using IronPdf;
using System;
using System.IO;

public class PdfGenerator
{
    public static bool CreatePdfSafely(string htmlContent, string outputPath)
    {
        try
        {
            var renderer = new ChromePdfRenderer();

            // Configure rendering options for better results
            renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait;
            renderer.RenderingOptions.MarginTop = 20;
            renderer.RenderingOptions.MarginBottom = 20;
            renderer.RenderingOptions.PrintHtmlBackgrounds = true;

            // Generate the PDF
            var pdf = renderer.RenderHtmlAsPdf(htmlContent);

            // Ensure directory exists
            string directory = Path.GetDirectoryName(outputPath);
            if (!Directory.Exists(directory))
            {
                Directory.CreateDirectory(directory);
            }

            // Save the PDF
            pdf.SaveAs(outputPath);

            return true;
        }
        catch (Exception ex)
        {
            // Log the error (you can use your preferred logging framework)
            Console.WriteLine($"PDF generation failed: {ex.Message}");
            return false;
        }
    }
}

Imports IronPdf
Imports System
Imports System.IO

Public Class PdfGenerator
    Public Shared Function CreatePdfSafely(htmlContent As String, outputPath As String) As Boolean
        Try
            Dim renderer As New ChromePdfRenderer()

            ' Configure rendering options for better results
            renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait
            renderer.RenderingOptions.MarginTop = 20
            renderer.RenderingOptions.MarginBottom = 20
            renderer.RenderingOptions.PrintHtmlBackgrounds = True

            ' Generate the PDF
            Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)

            ' Ensure directory exists
            Dim directory As String = Path.GetDirectoryName(outputPath)
            If Not Directory.Exists(directory) Then
                Directory.CreateDirectory(directory)
            End If

            ' Save the PDF
            pdf.SaveAs(outputPath)

            Return True
        Catch ex As Exception
            ' Log the error (you can use your preferred logging framework)
            Console.WriteLine($"PDF generation failed: {ex.Message}")
            Return False
        End Try
    End Function
End Class

// C# Program to create PDF from TextBox input using IronPDF
using IronPdf;
using System.Windows.Forms;

namespace readpdf
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        // Event handler for the button click
        private void button1_Click(object sender, System.EventArgs e)
        {
            // Create a ChromePdfRenderer object to convert HTML to PDF
            var HtmlLine = new ChromePdfRenderer();

            // Retrieve the text from the TextBox
            string text = textBox1.Text;

            // Render the HTML as a PDF, wrapping the text in an <h1> tag
            using var pdf = HtmlLine.RenderHtmlAsPdf("<h1>" + text + "</h1>");

            // Save the PDF to a file called "custom.pdf"
            pdf.SaveAs("custom.pdf");

            // Show a confirmation message to the user
            MessageBox.Show("Done!");
        }
    }
}

' C# Program to create PDF from TextBox input using IronPDF
Imports IronPdf
Imports System.Windows.Forms

Namespace readpdf
	Partial Public Class Form1
		Inherits Form

		Public Sub New()
			InitializeComponent()
		End Sub

		' Event handler for the button click
		Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)
			' Create a ChromePdfRenderer object to convert HTML to PDF
			Dim HtmlLine = New ChromePdfRenderer()

			' Retrieve the text from the TextBox
'INSTANT VB NOTE: The variable text was renamed since Visual Basic does not handle local variables named the same as class members well:
			Dim text_Conflict As String = textBox1.Text

			' Render the HTML as a PDF, wrapping the text in an <h1> tag
			Dim pdf = HtmlLine.RenderHtmlAsPdf("<h1>" & text_Conflict & "</h1>")

			' Save the PDF to a file called "custom.pdf"
			pdf.SaveAs("custom.pdf")

			' Show a confirmation message to the user
			MessageBox.Show("Done!")
		End Sub
	End Class
End Namespace

using IronPdf;

// Create renderer with custom settings
var renderer = new ChromePdfRenderer();

// Page setup options
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait;

// Margins (in millimeters)
renderer.RenderingOptions.MarginTop = 25;
renderer.RenderingOptions.MarginBottom = 25;
renderer.RenderingOptions.MarginLeft = 20;
renderer.RenderingOptions.MarginRight = 20;

// Header and footer configuration
renderer.RenderingOptions.HtmlHeader = new HtmlHeaderFooter()
{
    Height = 15,
    HtmlFragment = "<div style='text-align: center;'>{page} of {total-pages}</div>",
    DrawDividerLine = true
};

// Additional options
renderer.RenderingOptions.PrintHtmlBackgrounds = true;
renderer.RenderingOptions.GrayScale = false;
renderer.RenderingOptions.Zoom = 100;
renderer.RenderingOptions.CreatePdfFormsFromHtml = true;

// Apply custom CSS for print
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;

// Generate PDF with all customizations
var pdf = renderer.RenderHtmlAsPdf("<h1>Customized PDF Output</h1>");
pdf.SaveAs("customized.pdf");

Imports IronPdf

' Create renderer with custom settings
Dim renderer = New ChromePdfRenderer()

' Page setup options
renderer.RenderingOptions.PaperSize = PdfPaperSize.A4
renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Portrait

' Margins (in millimeters)
renderer.RenderingOptions.MarginTop = 25
renderer.RenderingOptions.MarginBottom = 25
renderer.RenderingOptions.MarginLeft = 20
renderer.RenderingOptions.MarginRight = 20

' Header and footer configuration
renderer.RenderingOptions.HtmlHeader = New HtmlHeaderFooter() With {
    .Height = 15,
    .HtmlFragment = "<div style='text-align: center;'>{page} of {total-pages}</div>",
    .DrawDividerLine = True
}

' Additional options
renderer.RenderingOptions.PrintHtmlBackgrounds = True
renderer.RenderingOptions.GrayScale = False
renderer.RenderingOptions.Zoom = 100
renderer.RenderingOptions.CreatePdfFormsFromHtml = True

' Apply custom CSS for print
renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print

' Generate PDF with all customizations
Dim pdf = renderer.RenderHtmlAsPdf("<h1>Customized PDF Output</h1>")
pdf.SaveAs("customized.pdf")