System.Diagnostics.Process OutputDataReceived和wkhtmltopdf的问题

Question

I'm using wkhtmltopdf to generate PDF documents. The solution here was working perfectly until it started timing out with larger data sets. Now I am using the solution here to prevent Process from timing out. I've pretty much copy/pasted it, and added the following:

public byte[] WKHtmlToPdf(string url)
{
    int timeout = 60000;
    int returnCode = 0;
    byte[] file = new byte[932768];

    using (Process process = new Process())
    {
        // etc etc, same code as the solution from above

        // ...
        if (process.WaitForExit(timeout) &&
            outputWaitHandle.WaitOne(timeout) &&
            errorWaitHandle.WaitOne(timeout))
        {
            // Process completed. Check process.ExitCode here.
            file = Encoding.UTF8.GetBytes(output.ToString());
            returnCode = process.ExitCode;
        }
        // ...
    }

    return returnCode == 0 ? file : null;
}

(The object returned by this method is written to System.Web.HttpContext.Current.Response )

The result is better than before in that it doesn't time out, but every page on the PDF file is blank. I've tried explicity telling wkhtmltopdf to use utf-8 but that doesn't work either. The amount of pages is correct though - if I run the tool manually and use the same URL to convert to PDF, I get the same amount of pages.

What is wrong here?

Answer 1

If anyone had the same issue as I did, they might want to try the solution here . Worked flawlessly for me.