Convert HTML string to PDF bytes in C# and .NET


Complete code

using System;
using System.IO;
using System.Collections;
using System.Net;

namespace Sample
{
    class Test
    {

        static void Main(string[] args)
		{
			// Activate your license here
			// SautinSoft.PdfMetamorphosis.SetLicense("1234567890");

            SautinSoft.PdfMetamorphosis p = new SautinSoft.PdfMetamorphosis();

            if (p != null)
            {
                string htmlPath = @"..\..\..\example.htm";
                string pdfPath = Path.ChangeExtension(htmlPath, ".pdf");
                string htmlString = "";

                // The easiest way is using the method 'HtmlToPdfConvertFile':
                // int ret = p.HtmlToPdfConvertFile(htmlPath,pdfPath);
                // or :
                // 1. Get HTML content.
                htmlString = ReadFromFile(htmlPath); 

                // 2. Converting HTML to PDF
                // Specify BaseUrl to help converter find a full path for relative images, CSS.
                p.HtmlSettings.BaseUrl = Path.GetDirectoryName(Path.GetFullPath(htmlPath));
                byte[] pdfBytes = p.HtmlToPdfConvertStringToByte(htmlString);

                if (pdfBytes != null)
                {
                    // 3. Save the PDF document to a file for a viewing purpose.
                    File.WriteAllBytes(pdfPath, pdfBytes);
					System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(pdfPath) { UseShellExecute = true });
                }
                else
                {               
                    System.Console.WriteLine("An error occurred during converting HTML to PDF!");
                }
            }
        }

        public static string ReadFromFile(string fileName)
        {
            try
            {
                FileInfo fi = new FileInfo(fileName);
                FileStream strmRead = fi.Open(FileMode.Open);
                int len = (int)fi.Length;
                byte[] b = new byte[len];
                strmRead.Read(b, 0, len);
                strmRead.Close();
                char[] arCharRes = new char[len];
                for (int i = 0; i < len; i++)
                {
                    arCharRes[i] = (char)b[i];
                }
                return new string(arCharRes);
            }
            catch
            {                
                return "";
            }
        }
    }
}

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Imports System.IO

Namespace Sample
    Friend Class Test

        Shared Sub Main(ByVal args() As String)
				' Activate your license here
				' SautinSoft.PdfMetamorphosis.SetLicense("1234567890")

			Dim p As New SautinSoft.PdfMetamorphosis()

            If p IsNot Nothing Then
                Dim htmlPath As String = "..\..\..\example.htm"
                Dim pdfPath As String = Path.ChangeExtension(htmlPath, ".pdf")
                Dim htmlString As String = ""

                ' The easiest way is using the method 'HtmlToPdfConvertFile':
                ' int ret = p.HtmlToPdfConvertFile(htmlPath,pdfPath)
                ' or :
                ' 1. Get HTML content.
                htmlString = ReadFromFile(htmlPath)

                ' 2. Converting HTML to PDF
                ' Specify BaseUrl to help converter find a full path for relative images, CSS.
                p.HtmlSettings.BaseUrl = Path.GetDirectoryName(Path.GetFullPath(htmlPath))
                Dim pdfBytes() As Byte = p.HtmlToPdfConvertStringToByte(htmlString)

                If pdfBytes IsNot Nothing Then

                    ' 3. Save the PDF document to a file for a viewing purpose.
                    File.WriteAllBytes(pdfPath, pdfBytes)
                    System.Diagnostics.Process.Start(New System.Diagnostics.ProcessStartInfo(pdfPath) With {.UseShellExecute = True})
                Else
                    System.Console.WriteLine("An error occurred during converting HTML to PDF!")
                End If
            End If
        End Sub
        Public Shared Function ReadFromFile(ByVal fileName As String) As String
            Try
                Dim fi As New FileInfo(fileName)
                Dim strmRead As FileStream = fi.Open(FileMode.Open)
                Dim len As Integer = CInt(fi.Length)
                Dim b(len - 1) As Byte
                strmRead.Read(b, 0, len)
                strmRead.Close()
                Dim arCharRes(len - 1) As Char
                For i As Integer = 0 To len - 1
                    arCharRes(i) = Microsoft.VisualBasic.ChrW(b(i))
                Next i
                Return New String(arCharRes)
            Catch
                Return ""
            End Try
        End Function
    End Class
End Namespace

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