如何用 C# 从 wkhtmltopdf 迁移到 IronPDF

# Removewkhtmltopdfwrapper (whichever you're using)
dotnet remove package WkHtmlToPdf-DotNet
dotnet remove package DinkToPdf
dotnet remove package TuesPechkin
dotnet remove package Rotativa
dotnet remove package Rotativa.AspNetCore
dotnet remove package NReco.PdfGenerator

# Removewkhtmltopdfbinary from your deployment
# Delete wkhtmltopdf.exe, wkhtmltox.dll, etc.

# AddIronPDF(secure, modern alternative)
dotnet add package IronPdf

// Before (wkhtmltopdf)
using WkHtmlToPdfDotNet;
using WkHtmlToPdfDotNet.Contracts;

// After (IronPDF)
using IronPdf;

' Before (wkhtmltopdf)
Imports WkHtmlToPdfDotNet
Imports WkHtmlToPdfDotNet.Contracts

' After (IronPDF)
Imports IronPdf

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

// NuGet: Install-Package WkHtmlToPdf-DotNet
using WkHtmlToPdfDotNet;
using WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("output.pdf", pdf);
    }
}

' NuGet: Install-Package WkHtmlToPdf-DotNet
Imports WkHtmlToPdfDotNet
Imports WkHtmlToPdfDotNet.Contracts
Imports System.IO

Class Program
    Shared Sub Main()
        Dim converter = New SynchronizedConverter(New PdfTools())
        Dim doc = New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = {
                New ObjectSettings() With {
                    .HtmlContent = "<h1>Hello World</h1><p>This is a PDF from HTML.</p>"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("output.pdf", pdf)
    End Sub
End Class

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>This is a PDF from HTML.</p>");
        pdf.SaveAs("output.pdf");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderHtmlAsPdf("<h1>Hello World</h1><p>This is a PDF from HTML.</p>")
        pdf.SaveAs("output.pdf")
    End Sub
End Class

// NuGet: Install-Package WkHtmlToPdf-DotNet
using WkHtmlToPdfDotNet;
using WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Portrait,
                PaperSize = PaperKind.A4
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "https://www.example.com"
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("webpage.pdf", pdf);
    }
}

' NuGet: Install-Package WkHtmlToPdf-DotNet
Imports WkHtmlToPdfDotNet
Imports WkHtmlToPdfDotNet.Contracts
Imports System.IO

Module Program
    Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Portrait,
                .PaperSize = PaperKind.A4
            },
            .Objects = {
                New ObjectSettings() With {
                    .Page = "https://www.example.com"
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("webpage.pdf", pdf)
    End Sub
End Module

// NuGet: Install-Package IronPdf
using IronPdf;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        var pdf = renderer.RenderUrlAsPdf("https://www.example.com");
        pdf.SaveAs("webpage.pdf");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        Dim renderer = New ChromePdfRenderer()
        Dim pdf = renderer.RenderUrlAsPdf("https://www.example.com")
        pdf.SaveAs("webpage.pdf")
    End Sub
End Class

// NuGet: Install-Package WkHtmlToPdf-DotNet
using WkHtmlToPdfDotNet;
using WkHtmlToPdfDotNet.Contracts;
using System.IO;

class Program
{
    static void Main()
    {
        var converter = new SynchronizedConverter(new PdfTools());
        var doc = new HtmlToPdfDocument()
        {
            GlobalSettings = {
                ColorMode = ColorMode.Color,
                Orientation = Orientation.Landscape,
                PaperSize = PaperKind.A4,
                Margins = new MarginSettings() { Top = 10, Bottom = 10, Left = 10, Right = 10 }
            },
            Objects = {
                new ObjectSettings()
                {
                    Page = "input.html",
                    WebSettings = { DefaultEncoding = "utf-8" }
                }
            }
        };
        byte[] pdf = converter.Convert(doc);
        File.WriteAllBytes("custom-output.pdf", pdf);
    }
}

' NuGet: Install-Package WkHtmlToPdf-DotNet
Imports WkHtmlToPdfDotNet
Imports WkHtmlToPdfDotNet.Contracts
Imports System.IO

Class Program
    Shared Sub Main()
        Dim converter As New SynchronizedConverter(New PdfTools())
        Dim doc As New HtmlToPdfDocument() With {
            .GlobalSettings = New GlobalSettings() With {
                .ColorMode = ColorMode.Color,
                .Orientation = Orientation.Landscape,
                .PaperSize = PaperKind.A4,
                .Margins = New MarginSettings() With {.Top = 10, .Bottom = 10, .Left = 10, .Right = 10}
            },
            .Objects = {
                New ObjectSettings() With {
                    .Page = "input.html",
                    .WebSettings = New WebSettings() With {.DefaultEncoding = "utf-8"}
                }
            }
        }
        Dim pdf As Byte() = converter.Convert(doc)
        File.WriteAllBytes("custom-output.pdf", pdf)
    End Sub
End Class

// NuGet: Install-Package IronPdf
using IronPdf;
using IronPdf.Rendering;
using System;

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape;
        renderer.RenderingOptions.MarginTop = 10;
        renderer.RenderingOptions.MarginBottom = 10;
        renderer.RenderingOptions.MarginLeft = 10;
        renderer.RenderingOptions.MarginRight = 10;
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4;

        var pdf = renderer.RenderHtmlFileAsPdf("input.html");
        pdf.SaveAs("custom-output.pdf");
    }
}

Imports IronPdf
Imports IronPdf.Rendering
Imports System

Class Program
    Shared Sub Main()
        Dim renderer As New ChromePdfRenderer()
        renderer.RenderingOptions.PaperOrientation = PdfPaperOrientation.Landscape
        renderer.RenderingOptions.MarginTop = 10
        renderer.RenderingOptions.MarginBottom = 10
        renderer.RenderingOptions.MarginLeft = 10
        renderer.RenderingOptions.MarginRight = 10
        renderer.RenderingOptions.PaperSize = PdfPaperSize.A4

        Dim pdf = renderer.RenderHtmlFileAsPdf("input.html")
        pdf.SaveAs("custom-output.pdf")
    End Sub
End Class

// Before (wkhtmltopdf)
FooterSettings = { Left = "Page [page] of [toPage]" }

// After (IronPDF)
renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
{
    HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    MaxHeight = 25
};

' Before (wkhtmltopdf)
FooterSettings = New With {.Left = "Page [page] of [toPage]"}

' After (IronPDF)
renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
    .HtmlFragment = "<div style='text-align:left;'>Page {page} of {total-pages}</div>",
    .MaxHeight = 25
}

renderer.RenderingOptions.EnableJavaScript = true;

// Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500);

// Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded");

// Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true");

renderer.RenderingOptions.EnableJavaScript = True

' Option 1: Fixed delay
renderer.RenderingOptions.WaitFor.RenderDelay(500)

' Option 2: Wait for specific element (more reliable)
renderer.RenderingOptions.WaitFor.HtmlElementById("content-loaded")

' Option 3: Wait for JavaScript condition
renderer.RenderingOptions.WaitFor.JavaScript("window.renderComplete === true")

// This CSS now works with IronPDF
var html = @"
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>";

var pdf = renderer.RenderHtmlAsPdf(html);

Dim html As String = "
<style>
    .grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
    .flex { display: flex; justify-content: space-between; align-items: center; }
</style>
<div class='grid'>
    <div>Column 1</div>
    <div>Column 2</div>
    <div>Column 3</div>
</div>"

Dim pdf = renderer.RenderHtmlAsPdf(html)

public async Task<byte[]> GeneratePdfAsync(string html)
{
    var renderer = new ChromePdfRenderer();
    var pdf = await renderer.RenderHtmlAsPdfAsync(html);
    return pdf.BinaryData;
}

Imports System.Threading.Tasks

Public Async Function GeneratePdfAsync(html As String) As Task(Of Byte())
    Dim renderer As New ChromePdfRenderer()
    Dim pdf = Await renderer.RenderHtmlAsPdfAsync(html)
    Return pdf.BinaryData
End Function

# Find allwkhtmltopdfreferences
grep -r "WkHtmlToPdfDotNet\|DinkToPdf\|TuesPechkin\|Rotativa" --include="*.cs" .
grep -r "wkhtmltopdf" --include="*.yml" --include="*.yaml" --include="Dockerfile" .

# Scan for any remainingwkhtmltopdfartifacts
find /var/www/ -name "*wkhtmlto*" 2>/dev/null
find /usr/local/bin/ -name "*wkhtmlto*" 2>/dev/null
docker images | grep wkhtmltopdf

# Check if any process is still using it
ps aux | grep wkhtmltopdf