Как преобразовать HTML в PDF файл в памяти на C# и .NET
Полный код
GitHubusing System;
using System.IO;
using SautinSoft.PdfVision;
namespace Sample
{
class Program
{
static void Main(string[] args)
{
ConvertHtmlToPdfInMemory();
}
public static void ConvertHtmlToPdfInMemory()
{
// This string will contains HTML string with the local image.
string inpHtml = "<html>\r\n<body>\r\n<p> Hello </p>\r\n<p><img src=\"sautinsoft.png\"/></p>\r\n<p>Bye </p>\r\n</body>\r\n</html>";
byte[] pdfBytes = null;
PdfVision v = new PdfVision();
HtmlToPdfOptions options = new HtmlToPdfOptions()
{
// The baseURL property specifies or retrieves the base URL used for
// relative path resolution with URL script commands that are embedded in media items.
// Website - http://example.com/ or http://example.com/contact
// LocalPath - C:/example/ or C:/example/contact
BaseUrl = @"https://sautinsoft.com/images/",
PageSetup = new PageSetup()
{
PaperType = PaperType.Letter,
Orientation = Orientation.Landscape,
PageMargins = new PageMargins()
{
Left = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
Top = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
Right = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
Bottom = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter)
}
},
PrintBackground = true,
Scale = 0.7M,
//Set a custom directory where will be placed portable Chromium browser.
//Default value depends of platform (win-x64, win-86, linux-x64 or osx-x64).
ChromiumBaseDirectory = Path.GetFullPath(@"..\..\..\..\..\..\Chromium\")
};
try
{
// The whole conversion process will be done completely in memory.
pdfBytes = v.ConvertHtmlToPdf(inpHtml, options);
// This file is necessary only to show the result.
string outFile = new FileInfo("Result.pdf").FullName;
// Save pdfBytes to the file and open the result for demonstration purposes.
File.WriteAllBytes(outFile, pdfBytes);
System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(outFile) { UseShellExecute = true });
}
catch (Exception ex)
{
Console.WriteLine($"Error: {ex.Message}");
Console.ReadLine();
}
}
}
}
Imports Microsoft.VisualBasic
Imports System
Imports System.IO
Imports SautinSoft.PdfVision
Namespace Sample
Friend Class Program
Shared Sub Main(ByVal args() As String)
ConvertHtmlToPdfInMemory()
End Sub
Public Shared Sub ConvertHtmlToPdfInMemory()
' This string will contains HTML string with the local image.
Dim inpHtml As String = "<html>" & vbCrLf & "<body>" & vbCrLf & "<p> Hello </p>" & vbCrLf & "<p><img src=""sautinsoft.png""/></p>" & vbCrLf & "<p>Bye </p>" & vbCrLf & "</body>" & vbCrLf & "</html>"
Dim pdfBytes() As Byte = Nothing
Dim v As New PdfVision()
' The baseURL property specifies Or retrieves the base URL used for
' relative path resolution with URL script commands that are embedded in media items.
' Website - http://example.com/ Or http://example.com/contact
' LocalPath - C:/example/ Or C:/example/contact
Dim options As New HtmlToPdfOptions() With {
.BaseUrl = "https://sautinsoft.com/images/",
.PageSetup = New PageSetup() With {
.PaperType = PaperType.Letter,
.Orientation = Orientation.Landscape,
.PageMargins = New PageMargins() With {
.Left = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
.Top = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
.Right = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter),
.Bottom = LengthUnitConverter.ToPoint(5, LengthUnit.Millimeter)
}
},
.PrintBackground = True,
.Scale = 0.7D,
.ChromiumBaseDirectory = Path.GetFullPath("..\..\..\..\..\..\Chromium\")
}
Try
' The whole conversion process will be done completely in memory.
pdfBytes = v.ConvertHtmlToPdf(inpHtml, options)
' This file is necessary only to show the result.
Dim outFile As String = (New FileInfo("Result.pdf")).FullName
' Save pdfBytes to the file and open the result for demonstration purposes.
File.WriteAllBytes(outFile, pdfBytes)
System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(outFile) With {.UseShellExecute = True})
Catch ex As Exception
Console.WriteLine($"Error: {ex.Message}")
Console.ReadLine()
End Try
End Sub
End Class
End Namespace
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