/// <summary>
/// Converts the HTML string to PDF file.
/// </summary>
/// <param name="htmlToConvert">The HTML to convert.</param>
/// <returns>Byte Array - contains the PDF file from the HTML passed in.</returns>
/// <remarks>Requires images to be embedded.</remarks>
public static byte[] ConvertHtmlStringToPdfFile(string htmlToConvert)
{
byte[] pdfFile = null;
// set temp build location
PdfConvertEnvironment environment = Environment;
string outputPdfFilePath = Path.Combine(environment.TempFolderPath, String.Format("{0}.pdf", Guid.NewGuid()));
// check for the converter being installed in the site
if (!File.Exists(environment.WkHtmlToPdfPath))
{
throw new PdfConvertException(String.Format("File '{0}' not found. Check if wkhtmltopdf application is installed.", environment.WkHtmlToPdfPath));
}
// setup the converter
var processStartInfo = new ProcessStartInfo
{
CreateNoWindow = !environment.Debug,
FileName = environment.WkHtmlToPdfPath,
Arguments = "-q -n - " + outputPdfFilePath, // this will right out the file to disk
UseShellExecute = false,
RedirectStandardError = !environment.Debug,
RedirectStandardInput = true,
RedirectStandardOutput = true,
};
//p.StartInfo.Arguments = switches + " " + Url + " " + filename;
//p.StartInfo.UseShellExecute = false; // needs to be false in order to redirect output
//p.StartInfo.RedirectStandardOutput = true;
//p.StartInfo.RedirectStandardError = true;
//p.StartInfo.RedirectStandardInput = true; // redirect all 3, as it should be all 3 or none
//p.StartInfo.WorkingDirectory = StripFilenameFromFullPath(p.StartInfo.FileName);
//p.Start();
// read the output here...
//string output = p.StandardOutput.ReadToEnd();
// file handling containers
StreamWriter streamWriter;
Stream stream = new MemoryStream();
try
{
using (var process = new Process())
{
process.StartInfo = processStartInfo;
process.Start();
if (!process.WaitForExit(environment.Timeout))
{
throw new PdfConvertTimeoutException();
}
if (!File.Exists(outputPdfFilePath))
{
if (process.ExitCode != 0)
{
var error = processStartInfo.RedirectStandardError ? process.StandardError.ReadToEnd() : String.Format("Process exited with code {0}.", process.ExitCode);
throw new PdfConvertException(String.Format("Html to PDF conversion of HTML static text failed. Wkhtmltopdf output: \r\n{0}", error));
}
throw new PdfConvertException(String.Format("Html to PDF conversion of HTML static text failed. Reason: Output file '{0}' not found.", outputPdfFilePath));
}
streamWriter = process.StandardInput;
streamWriter.AutoFlush = true;
streamWriter.Write(htmlToConvert);
streamWriter.Close();
// build a stream of the PDF file reading from disk
using (Stream fs = new FileStream(outputPdfFilePath, FileMode.Open))
{
int read;
byte[] buffer = new byte[32 * 1024];
while ((read = fs.Read(buffer, 0, buffer.Length)) > 0)
{
stream.Write(buffer, 0, read);
}
}
// put the stream into an array to user download
using (MemoryStream ms = new MemoryStream())
{
stream.Position = 0;
int read;
byte[] bufferOut = new byte[16 * 1024];
while ((read = stream.Read(bufferOut, 0, bufferOut.Length)) > 0)
{
ms.Write(bufferOut, 0, read);
}
pdfFile = ms.ToArray();
}
}
}
finally
{
// clean up temp file that was generated
if (File.Exists(outputPdfFilePath))
{
File.Delete(outputPdfFilePath);
}
}
return(pdfFile);
}
public static void ConvertHtmlToPdf(PdfDocument document, PdfConvertEnvironment environment, PdfOutput woutput)
{
if (environment == null)
{
environment = Environment;
}
String outputPdfFilePath;
bool delete;
if (woutput.OutputFilePath != null)
{
outputPdfFilePath = woutput.OutputFilePath;
delete = false;
}
else
{
outputPdfFilePath = Path.Combine(environment.TempFolderPath, String.Format("{0}.pdf", Guid.NewGuid()));
delete = true;
}
if (!File.Exists(environment.WkHtmlToPdfPath))
{
throw new PdfConvertException(String.Format("File '{0}' not found. Check if wkhtmltopdf application is installed.", environment.WkHtmlToPdfPath));
}
ProcessStartInfo si;
StringBuilder paramsBuilder = new StringBuilder();
paramsBuilder.Append("--page-size A4 ");
paramsBuilder.Append("--load-error-handling ignore ");
//paramsBuilder.Append("--redirect-delay 0 "); not available in latest version
paramsBuilder.Append("--margin-top 10 ");
paramsBuilder.Append("--margin-left 5 ");
paramsBuilder.Append("--margin-right 5 ");
paramsBuilder.Append("--margin-bottom 10 ");
if (!string.IsNullOrEmpty(document.HeaderUrl))
{
paramsBuilder.AppendFormat("--header-html {0} ", document.HeaderUrl);
paramsBuilder.Append("--margin-top 0 ");
paramsBuilder.Append("--header-spacing 0 ");
}
if (!string.IsNullOrEmpty(document.FooterUrl))
{
paramsBuilder.AppendFormat("--footer-html {0} ", document.FooterUrl);
paramsBuilder.Append("--margin-bottom 0 ");
paramsBuilder.Append("--footer-spacing 0 ");
}
//remove the border from the pages
// paramsBuilder.Append("-L 0 -R 0 -T 0 -B 0 ");
paramsBuilder.AppendFormat("\"{0}\" \"{1}\"", document.Url, outputPdfFilePath);
si = new ProcessStartInfo();
si.CreateNoWindow = true;
si.FileName = environment.WkHtmlToPdfPath;
si.Arguments = paramsBuilder.ToString();
si.UseShellExecute = false;
si.RedirectStandardError = true;
si.RedirectStandardInput = true;
si.RedirectStandardOutput = true;
try
{
using (var process = new Process())
{
process.StartInfo = si;
process.Start();
if (!process.WaitForExit(environment.Timeout))
{
throw new PdfConvertTimeoutException();
}
if (!File.Exists(outputPdfFilePath))
{
if (process.ExitCode != 0)
{
var error = si.RedirectStandardError ? process.StandardError.ReadToEnd() : String.Format("Process exited with code {0}.", process.ExitCode);
throw new PdfConvertException(String.Format("Html to PDF conversion of '{0}' failed. Wkhtmltopdf output: \r\n{1}", document.Url, error));
}
throw new PdfConvertException(String.Format("Html to PDF conversion of '{0}' failed. Reason: Output file '{1}' not found.", document.Url, outputPdfFilePath));
}
if (woutput.OutputStream != null)
{
using (Stream fs = new FileStream(outputPdfFilePath, FileMode.Open))
{
byte[] buffer = new byte[32 * 1024];
int read;
while ((read = fs.Read(buffer, 0, buffer.Length)) > 0)
{
woutput.OutputStream.Write(buffer, 0, read);
}
}
}
if (woutput.OutputCallback != null)
{
woutput.OutputCallback(document, File.ReadAllBytes(outputPdfFilePath));
}
}
}
finally
{
if (delete && File.Exists(outputPdfFilePath))
{
File.Delete(outputPdfFilePath);
}
}
}
