如何在ASPNET中将视图转换为PDF

# Crystal Reports for Visual Studio is not distributed by SAP on NuGet.
# Projects typically reference the GAC-installed CrystalDecisions.*.dll
# assemblies delivered by the CR4VS / CR runtime MSI. Community-maintained
# NuGet wrappers such as CrystalReports.Engine exist for build automation
# but are not official SAP packages.

# 1. Remove direct assembly references (CrystalDecisions.*.dll) from your .csproj
# 2. If using a community NuGet wrapper, remove it:
dotnet remove package CrystalReports.Engine

# 3. Uninstall the Crystal Reports runtime MSI from build/deploy targets

# 4. Install IronPDF
dotnet add package IronPdf

// Add at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY";

' Add at application startup
IronPdf.License.LicenseKey = "YOUR-LICENSE-KEY"

// Before: SAP Crystal Reports
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using CrystalDecisions.ReportAppServer;

// After: IronPDF
using IronPdf;

Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports CrystalDecisions.ReportAppServer

Imports IronPdf

// NuGet: Install-Package CrystalReports.Engine
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System;

class Program
{
    static void Main()
    {
        // Crystal Reports requires a .rpt file template
        ReportDocument reportDocument = new ReportDocument();
        reportDocument.Load("Report.rpt");

        // Crystal Reports doesn't directly support HTML
        // You need to bind data to the report template
        // reportDocument.SetDataSource(dataSet);

        ExportOptions exportOptions = reportDocument.ExportOptions;
        exportOptions.ExportDestinationType = ExportDestinationType.DiskFile;
        exportOptions.ExportFormatType = ExportFormatType.PortableDocFormat;

        DiskFileDestinationOptions diskOptions = new DiskFileDestinationOptions();
        diskOptions.DiskFileName = "output.pdf";
        exportOptions.DestinationOptions = diskOptions;

        reportDocument.Export();
        reportDocument.Close();
        reportDocument.Dispose();
    }
}

Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports System

Class Program
    Shared Sub Main()
        ' Crystal Reports requires a .rpt file template
        Dim reportDocument As New ReportDocument()
        reportDocument.Load("Report.rpt")

        ' Crystal Reports doesn't directly support HTML
        ' You need to bind data to the report template
        ' reportDocument.SetDataSource(dataSet)

        Dim exportOptions As ExportOptions = reportDocument.ExportOptions
        exportOptions.ExportDestinationType = ExportDestinationType.DiskFile
        exportOptions.ExportFormatType = ExportFormatType.PortableDocFormat

        Dim diskOptions As New DiskFileDestinationOptions()
        diskOptions.DiskFileName = "output.pdf"
        exportOptions.DestinationOptions = diskOptions

        reportDocument.Export()
        reportDocument.Close()
        reportDocument.Dispose()
    End Sub
End Class

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

class Program
{
    static void Main()
    {
        // Create a PDF from HTML string
        var renderer = new ChromePdfRenderer();

        string htmlContent = "<h1>Hello World</h1><p>This is a PDF generated from HTML.</p>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs("output.pdf");

        Console.WriteLine("PDF created successfully!");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        ' Create a PDF from HTML string
        Dim renderer As New ChromePdfRenderer()

        Dim htmlContent As String = "<h1>Hello World</h1><p>This is a PDF generated from HTML.</p>"

        Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
        pdf.SaveAs("output.pdf")

        Console.WriteLine("PDF created successfully!")
    End Sub
End Class

// NuGet: Install-Package CrystalReports.Engine
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System;
using System.Net;

class Program
{
    static void Main()
    {
        // Crystal Reports cannot directly convert URLs to PDF
        // You need to create a report template first

        // Download HTML content
        WebClient client = new WebClient();
        string htmlContent = client.DownloadString("https://example.com");

        // Crystal Reports requires .rpt template and data binding
        // This approach is not straightforward for URL conversion
        ReportDocument reportDocument = new ReportDocument();
        reportDocument.Load("WebReport.rpt");

        // Manual data extraction and binding required
        // reportDocument.SetDataSource(extractedData);

        reportDocument.ExportToDisk(ExportFormatType.PortableDocFormat, "output.pdf");
        reportDocument.Close();
        reportDocument.Dispose();
    }
}

Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports System
Imports System.Net

Module Program
    Sub Main()
        ' Crystal Reports cannot directly convert URLs to PDF
        ' You need to create a report template first

        ' Download HTML content
        Dim client As New WebClient()
        Dim htmlContent As String = client.DownloadString("https://example.com")

        ' Crystal Reports requires .rpt template and data binding
        ' This approach is not straightforward for URL conversion
        Dim reportDocument As New ReportDocument()
        reportDocument.Load("WebReport.rpt")

        ' Manual data extraction and binding required
        ' reportDocument.SetDataSource(extractedData)

        reportDocument.ExportToDisk(ExportFormatType.PortableDocFormat, "output.pdf")
        reportDocument.Close()
        reportDocument.Dispose()
    End Sub
End Module

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

class Program
{
    static void Main()
    {
        // Create a PDF from a URL
        var renderer = new ChromePdfRenderer();

        var pdf = renderer.RenderUrlAsPdf("https://example.com");
        pdf.SaveAs("output.pdf");

        Console.WriteLine("PDF created from URL successfully!");
    }
}

Imports IronPdf
Imports System

Class Program
    Shared Sub Main()
        ' Create a PDF from a URL
        Dim renderer As New ChromePdfRenderer()

        Dim pdf = renderer.RenderUrlAsPdf("https://example.com")
        pdf.SaveAs("output.pdf")

        Console.WriteLine("PDF created from URL successfully!")
    End Sub
End Class

// NuGet: Install-Package CrystalReports.Engine
using CrystalDecisions.CrystalReports.Engine;
using CrystalDecisions.Shared;
using System;

class Program
{
    static void Main()
    {
        // Crystal Reports requires design-time configuration
        ReportDocument reportDocument = new ReportDocument();
        reportDocument.Load("Report.rpt");

        // Headers and footers must be designed in the .rpt file
        // using Crystal Reports designer
        // You can set parameter values programmatically
        reportDocument.SetParameterValue("HeaderText", "Company Name");
        reportDocument.SetParameterValue("FooterText", "Page ");

        // Crystal Reports handles page numbers through formula fields
        // configured in the designer

        reportDocument.ExportToDisk(ExportFormatType.PortableDocFormat, "output.pdf");
        reportDocument.Close();
        reportDocument.Dispose();
    }
}

Imports CrystalDecisions.CrystalReports.Engine
Imports CrystalDecisions.Shared
Imports System

Class Program
    Shared Sub Main()
        ' Crystal Reports requires design-time configuration
        Dim reportDocument As New ReportDocument()
        reportDocument.Load("Report.rpt")

        ' Headers and footers must be designed in the .rpt file
        ' using Crystal Reports designer
        ' You can set parameter values programmatically
        reportDocument.SetParameterValue("HeaderText", "Company Name")
        reportDocument.SetParameterValue("FooterText", "Page ")

        ' Crystal Reports handles page numbers through formula fields
        ' configured in the designer

        reportDocument.ExportToDisk(ExportFormatType.PortableDocFormat, "output.pdf")
        reportDocument.Close()
        reportDocument.Dispose()
    End Sub
End Class

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

class Program
{
    static void Main()
    {
        var renderer = new ChromePdfRenderer();

        // Configure headers and footers
        renderer.RenderingOptions.TextHeader.CenterText = "Company Name";
        renderer.RenderingOptions.TextHeader.FontSize = 12;

        renderer.RenderingOptions.TextFooter.LeftText = "Confidential";
        renderer.RenderingOptions.TextFooter.RightText = "Page {page} of {total-pages}";
        renderer.RenderingOptions.TextFooter.FontSize = 10;

        string htmlContent = "<h1>Document Title</h1><p>Document content goes here.</p>";

        var pdf = renderer.RenderHtmlAsPdf(htmlContent);
        pdf.SaveAs("output.pdf");

        Console.WriteLine("PDF with headers and footers created!");
    }
}

Imports IronPdf
Imports System

Module Program
    Sub Main()
        Dim renderer As New ChromePdfRenderer()

        ' Configure headers and footers
        renderer.RenderingOptions.TextHeader.CenterText = "Company Name"
        renderer.RenderingOptions.TextHeader.FontSize = 12

        renderer.RenderingOptions.TextFooter.LeftText = "Confidential"
        renderer.RenderingOptions.TextFooter.RightText = "Page {page} of {total-pages}"
        renderer.RenderingOptions.TextFooter.FontSize = 10

        Dim htmlContent As String = "<h1>Document Title</h1><p>Document content goes here.</p>"

        Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
        pdf.SaveAs("output.pdf")

        Console.WriteLine("PDF with headers and footers created!")
    End Sub
End Module

// Instead of Crystal's database integration
var data = await _dbContext.Orders
    .Where(o => o.Date >= startDate && o.Date <= endDate)
    .ToListAsync();

// Bind to HTML template
var html = GenerateReportHtml(data);

Option Strict On



' Instead of Crystal's database integration
Dim data = Await _dbContext.Orders _
    .Where(Function(o) o.Date >= startDate AndAlso o.Date <= endDate) _
    .ToListAsync()

' Bind to HTML template
Dim html = GenerateReportHtml(data)

# Just add the NuGet package
dotnet add package IronPdf
# That's it - no additional installs needed

var pdf1 = PdfDocument.FromFile("report1.pdf");
var pdf2 = PdfDocument.FromFile("report2.pdf");
var merged = PdfDocument.Merge(pdf1, pdf2);
merged.SaveAs("complete_report.pdf");

Dim pdf1 = PdfDocument.FromFile("report1.pdf")
Dim pdf2 = PdfDocument.FromFile("report2.pdf")
Dim merged = PdfDocument.Merge(pdf1, pdf2)
merged.SaveAs("complete_report.pdf")

var renderer = new ChromePdfRenderer();
var pdf = renderer.RenderHtmlAsPdf(reportHtml);

pdf.MetaData.Title = "Quarterly Sales Report";
pdf.MetaData.Author = "Finance Department";

pdf.SecuritySettings.OwnerPassword = "admin123";
pdf.SecuritySettings.UserPassword = "view123";
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.FullPrintRights;
pdf.SecuritySettings.AllowUserCopyPasteContent = false;

pdf.SaveAs("secure_report.pdf");

Dim renderer As New ChromePdfRenderer()
Dim pdf = renderer.RenderHtmlAsPdf(reportHtml)

pdf.MetaData.Title = "Quarterly Sales Report"
pdf.MetaData.Author = "Finance Department"

pdf.SecuritySettings.OwnerPassword = "admin123"
pdf.SecuritySettings.UserPassword = "view123"
pdf.SecuritySettings.AllowUserPrinting = PdfPrintSecurity.FullPrintRights
pdf.SecuritySettings.AllowUserCopyPasteContent = False

pdf.SaveAs("secure_report.pdf")

var signature = new PdfSignature("certificate.pfx", "password");
pdf.Sign(signature);

Dim signature = New PdfSignature("certificate.pfx", "password")
pdf.Sign(signature)

using IronPdf.Editing;

pdf.ApplyWatermark("<h1 style='color:red; opacity:0.3;'>DRAFT</h1>");

Imports IronPdf.Editing

pdf.ApplyWatermark("<h1 style='color:red; opacity:0.3;'>DRAFT</h1>")