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.Net wrapper for the very excellent https://wkhtmltopdf.org/
//Uncomment and paste into LinqPad: void Main()
//{
// var pathToWkHtmlToPdfExe=@"C:\yourpathto\wkhtmltopdf.exe";
// var outputPath=new FileInfo(Path.Combine(System.IO.Path.GetTempPath(), "htmlto.pdf"));
// var html="<html><head></head><body><style>body{font-family:\"Helvetica\"}</style><h1>Hello World</h1></body></html>";
// using(var outputstream= new MemoryStream(10000))
// {
// HtmlToPdfWriter.GeneratePdf(new StringReader(html), outputstream, new Size{Width=210,Height=297}, pathToWkHtmlToPdfExe );
// Encoding.UTF8.GetString(outputstream.GetBuffer()).Dump();
// using (var fs=outputPath.OpenWrite()){ outputstream.CopyTo(fs); }
// }
// outputPath.FullName.Dump();
//}
public static class HtmlToPdfWriter
{
public static string defaultExePath = @".\wkhtmltopdf.exe";
public static bool GeneratePdf(TextReader html, Stream pdf, Size pageSizeInMM, string pathToExe = null)
{
pathToExe = pathToExe??defaultExePath;
ProcessStartInfo psi = new ProcessStartInfo
{
FileName = pathToExe,
WorkingDirectory = Path.GetDirectoryName(pathToExe),
UseShellExecute = false,
CreateNoWindow = true,
RedirectStandardInput = true,
RedirectStandardOutput = true,
RedirectStandardError = true,
Arguments =
"-q --disable-smart-shrinking --no-print-media-type " +
(pageSizeInMM.Equals( default(Size) )
? ""
: "--page-width " + pageSizeInMM.Width + "mm --page-height " + pageSizeInMM.Height + "mm") +
" - -"
/* note we tell wkhtmltopdf to be quiet and not run scripts */
};
try
{
using (Process p = Process.Start(psi))
{
try
{
StreamWriter stdin = p.StandardInput;
stdin.AutoFlush = true;
stdin.Write(html.ReadToEnd());
stdin.Dispose();
CopyStream(p.StandardOutput.BaseStream, pdf);
p.StandardOutput.Close();
pdf.Position = 0;
var result = p.WaitForExit(10000);
var exitCode = p.ExitCode;
return result;
}
catch
{
return false;
}
}
}
catch (System.ComponentModel.Win32Exception e)
{
throw new ApplicationException("Failed to run the pdf generator because " + e.Message ,e);
}
}
static void CopyStream(Stream input, Stream output)
{
byte[] buffer = new byte[32768];
int read;
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
output.Write(buffer, 0, read);
}
}
}
public struct Size { public int Height ; public int Width; }
@chrisfcarroll

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Owner Author

commented May 9, 2018

Dependency: wkhtmltopdf.exe

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