用 C# 将 HTML 转换为 PDF - 库选项的现实意义

// DsPdf builds PDFs with a fluent code-first layout API — the defining strength of Document Solutions.
// NuGet: Install-Package DS.Documents.Pdf
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
using System.Drawing;

class Program
{
    static void Main()
    {
        GcPdfDocument doc = new GcPdfDocument();
        GcPdfGraphics g = doc.NewPage().Graphics;

        TextFormat title = new TextFormat { Font = StandardFonts.HelveticaBold, FontSize = 20 };
        g.DrawString("Statement of Account", title, new PointF(72, 72));

        TextFormat body = new TextFormat { Font = StandardFonts.Helvetica, FontSize = 11 };
        g.DrawString("Generated 2026-05-26 — fluent code-first layout.", body, new PointF(72, 110));

        doc.Save("statement.pdf");
    }
}

Imports GrapeCity.Documents.Pdf
Imports GrapeCity.Documents.Text
Imports System.Drawing

Class Program
    Shared Sub Main()
        Dim doc As New GcPdfDocument()
        Dim g As GcPdfGraphics = doc.NewPage().Graphics

        Dim title As New TextFormat With {
            .Font = StandardFonts.HelveticaBold,
            .FontSize = 20
        }
        g.DrawString("Statement of Account", title, New PointF(72, 72))

        Dim body As New TextFormat With {
            .Font = StandardFonts.Helvetica,
            .FontSize = 11
        }
        g.DrawString("Generated 2026-05-26 — fluent code-first layout.", body, New PointF(72, 110))

        doc.Save("statement.pdf")
    End Sub
End Class

// NuGet: Install-Package IronPdf
using IronPdf;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        string html = @"<h1>Invoice 2026-0428</h1><p>Customer: Acme Corp</p><p>Total due: $1,240.00</p>";
        using var pdf = renderer.RenderHtmlAsPdf(html);
        pdf.SaveAs("invoice.pdf");
    }
}

Imports IronPdf

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim html As String = "<h1>Invoice 2026-0428</h1><p>Customer: Acme Corp</p><p>Total due: $1,240.00</p>"
        Using pdf = renderer.RenderHtmlAsPdf(html)
            pdf.SaveAs("invoice.pdf")
        End Using
    End Sub
End Class

// DsExcel is known for fast formula recalculation with 450+ built-in functions.
using GrapeCity.Documents.Excel;

class Program
{
    static void Main()
    {
        Workbook book = new Workbook();
        IWorksheet sheet = book.Worksheets[0];

        sheet.Range["A1"].Value = "Region";
        sheet.Range["B1"].Value = "Revenue";
        sheet.Range["A2"].Value = "EMEA";
        sheet.Range["B2"].Value = 120000;
        sheet.Range["B4"].Formula = "=SUM(B2:B3)";

        book.Calculate();

        book.Save("revenue.xlsx");
        book.Save("revenue.pdf");
    }
}

Imports GrapeCity.Documents.Excel

Class Program
    Shared Sub Main()
        Dim book As New Workbook()
        Dim sheet As IWorksheet = book.Worksheets(0)

        sheet.Range("A1").Value = "Region"
        sheet.Range("B1").Value = "Revenue"
        sheet.Range("A2").Value = "EMEA"
        sheet.Range("B2").Value = 120000
        sheet.Range("B4").Formula = "=SUM(B2:B3)"

        book.Calculate()

        book.Save("revenue.xlsx")
        book.Save("revenue.pdf")
    End Sub
End Class

// NuGet: Install-Package IronXL.Excel
using IronXL;

class Program
{
    static void Main()
    {
        WorkBook workbook = WorkBook.Create(ExcelFileFormat.XLSX);
        WorkSheet sheet = workbook.CreateWorkSheet("Sales");

        sheet["A1"].Value = "Product";
        sheet["B1"].Value = "Units";
        sheet["A2"].Value = "Widget A";
        sheet["B2"].Value = 1024;
        sheet["A3"].Value = "Widget B";
        sheet["B3"].Value = 768;
        sheet["B4"].Formula = "=SUM(B2:B3)";

        workbook.EvaluateAll();
        workbook.SaveAs("sales.xlsx");
    }
}

Imports IronXL

Module Program
    Sub Main()
        Dim workbook As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX)
        Dim sheet As WorkSheet = workbook.CreateWorkSheet("Sales")

        sheet("A1").Value = "Product"
        sheet("B1").Value = "Units"
        sheet("A2").Value = "Widget A"
        sheet("B2").Value = 1024
        sheet("A3").Value = "Widget B"
        sheet("B3").Value = 768
        sheet("B4").Formula = "=SUM(B2:B3)"

        workbook.EvaluateAll()
        workbook.SaveAs("sales.xlsx")
    End Sub
End Module

// DsWord generates and edits DOCX with a similar fluent code-first style.
using GrapeCity.Documents.Word;

class Program
{
    static void Main()
    {
        GcWordDocument doc = new GcWordDocument();
        Section section = doc.Body.Sections.Add();

        Paragraph title = section.GetRange().Paragraphs.Add("Quarterly Report");
        title.Style = doc.Styles[BuiltInStyleId.Heading1];

        Paragraph body = section.GetRange().Paragraphs.Add(
            "Generated from a .NET service with no Microsoft Word dependency.");
        body.Style = doc.Styles[BuiltInStyleId.Normal];

        doc.Save("report.docx");
        doc.Save("report.pdf");
    }
}

Imports GrapeCity.Documents.Word

Class Program
    Shared Sub Main()
        Dim doc As New GcWordDocument()
        Dim section As Section = doc.Body.Sections.Add()

        Dim title As Paragraph = section.GetRange().Paragraphs.Add("Quarterly Report")
        title.Style = doc.Styles(BuiltInStyleId.Heading1)

        Dim body As Paragraph = section.GetRange().Paragraphs.Add("Generated from a .NET service with no Microsoft Word dependency.")
        body.Style = doc.Styles(BuiltInStyleId.Normal)

        doc.Save("report.docx")
        doc.Save("report.pdf")
    End Sub
End Class

// NuGet: Install-Package IronWord
using IronWord;
using IronWord.Models;

class Program
{
    static void Main()
    {
        var doc = new WordDocument();
        var heading = new Paragraph();
        heading.AddChild(new TextRun("Quarterly Report — Q1 2026") { FontSize = 18, Bold = true });
        doc.AddParagraph(heading);

        var body = new Paragraph();
        body.AddChild(new TextRun("Revenue grew 14% quarter-over-quarter."));
        doc.AddParagraph(body);

        doc.SaveAs("report.docx");
    }
}

Imports IronWord
Imports IronWord.Models

Class Program
    Shared Sub Main()
        Dim doc As New WordDocument()
        Dim heading As New Paragraph()
        heading.AddChild(New TextRun("Quarterly Report — Q1 2026") With {.FontSize = 18, .Bold = True})
        doc.AddParagraph(heading)

        Dim body As New Paragraph()
        body.AddChild(New TextRun("Revenue grew 14% quarter-over-quarter."))
        doc.AddParagraph(body)

        doc.SaveAs("report.docx")
    End Sub
End Class

// DsImaging provides cross-platform image processing primitives that integrate with DsPdf and DsWord.
using GrapeCity.Documents.Imaging;

class Program
{
    static void Main()
    {
        using GcBitmap source = new GcBitmap();
        source.Load("source.jpg");

        using GcBitmap thumbnail = source.Resize(240, 160, InterpolationMode.Cubic);
        thumbnail.SaveAsJpeg("thumbnail.jpg");
    }
}

Imports GrapeCity.Documents.Imaging

Class Program
    Shared Sub Main()
        Using source As New GcBitmap()
            source.Load("source.jpg")

            Using thumbnail As GcBitmap = source.Resize(240, 160, InterpolationMode.Cubic)
                thumbnail.SaveAsJpeg("thumbnail.jpg")
            End Using
        End Using
    End Sub
End Class