How to use Codaxy.WkHtmlToPdf RSS

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  JDias

  Member

  7 Points

  18 Posts

  How to use Codaxy.WkHtmlToPdf

  Jul 09, 2020 10:25 AM|JDias|LINK

  I am using this C# converter from html to pdf.

  In the .csproj I have:

    <ItemGroup>
      <PackageReference Include="Codaxy.WkHtmlToPdf" Version="0.5.8" />
    </ItemGroup>
  

  I want to use in the controller something like:

              PdfConvert.ConvertHtmlToPdf(new PdfDocument
              {
                  Url = "http://wkhtmltopdf.org/",
                  HeaderLeft = "[title]",
                  HeaderRight = "[date] [time]",
                  FooterCenter = "Page [page] of [topage]"
  
              }, new PdfOutput
              {
                  OutputFilePath = "wkhtmltopdf-page.pdf"
              });

  (this is the same code as in GitHub).

  However, when I do (in the same controller):

  using Codaxy.WkHtmlToPdf;
  

  the project doesn't build (and shows error in the VS editor...). The error presented is:

  Error	CS0246	The type or namespace name 'Codaxy' could not be found (are you missing a using directive or an assembly reference?)

  The GitHub page of the project lacks directions on using using directive....

  Could you help me?

• • Reply
  jzero

  Participant

  1061 Points

  666 Posts

  Re: How to use Codaxy.WkHtmlToPdf

  Jul 09, 2020 06:44 PM|jzero|LINK

  Don´t know Codaxy.WkHtmlToPdf, if it help here is how I do it, this code has been translated from VB to C# hope it work for you

  protected void Button1_Click(object sender, EventArgs e)
  {
      string WorkingDirectory = @"c:\users\username\downloads";         // Set it for your correct path
      string WkExeFile = @"c:users\username\downloads\wkhtmltopdf.exe"; // Set it for your correct path
      string fail = null;
      try
      {
          byte[] URIToPDF = zConvertHtmlToPdfDile(new Uri("https://forums.asp.net"), WorkingDirectory, WkExeFile, "1", null, false);
          File.WriteAllBytes(@"c:\users\jzero\downloads\cebola.pdf", URIToPDF);
      }
      catch (Exception ex)
      {
          fail = ex.Message;
      }
  }
  

  public static byte[] zConvertHtmlToPdfDile(Uri pURL, string pWkDir, string pWkExe, string pWkZoom = "1", CookieCollection pCookies = null, bool pUsePrintMediaType = false)
  {
      StringBuilder args = new StringBuilder();
      {
          var withBlock = args;
          withBlock.Append("--quiet ");                                          // -q, --quiet               : Be less verbose, maintained for backwards compatibility; Same As Using --log-level none
          .Append("--disable-javascript ")                                       // -n, --disable-javascript  : Do not allow web pages to run javascript
          //.Append("--disable-smart-shrinking ")                                  // --disable-smart-shrinking : Disable the intelligent shrinking strategy used by WebKit that makes the pixel/dpi ratio none constant
          //.Append("--enable-smart-shrinking ")                                   // --enable-smart-shrinking  : Enable the intelligent shrinking strategy used by WebKit that makes the pixel/dpi ratio none constant (default)
          if (pWkZoom != null)
          {
              if (pWkZoom != string.Empty)
                  withBlock.Append("--zoom " + pWkZoom + " ");                   // --zoom <float> : Use this zoom factor (default 1)")
          }
          if (pCookies != null)
          {
              foreach (Cookie zCookie in pCookies)
                  withBlock.Append("--cookie " + zCookie.Name + " " + zCookie.Value + " ");
          }
          if (pUsePrintMediaType == true)
              withBlock.Append("--print-media-type ");
          withBlock.Append("--page-size A4 ");                                          // -s, --page-size <Size>    : Set paper size to: A4, Letter, etc. (default A4)
          withBlock.Append(pURL);                                                       // URL
          withBlock.Append(" -");                                                       // The dash - in the wkhtmltopdf command means that it takes it's input from stdin and not a file.
      }
      ProcessStartInfo processStartInfo = new ProcessStartInfo();                        
      {
          var withBlock = processStartInfo;
          withBlock.FileName = pWkExe;                                                  // Fullpath wkHtmlToPDf
          withBlock.WorkingDirectory = pWkDir;                                          // Working Directory for wkHtmlToPDf
          withBlock.Arguments = args.ToString();                                        // Argument command line
          withBlock.UseShellExecute = false;                                            
          withBlock.CreateNoWindow = true;                                              
          withBlock.RedirectStandardInput = true;                                       // Redirecionar input
          withBlock.RedirectStandardOutput = true;                                      // Redirecionar output
          withBlock.RedirectStandardError = true;                                       // Redirecionar erro
      }
      Process process__1 = Process.Start(processStartInfo);
      byte[] buffer = new byte[32768] { };
      byte[] file;
      using (var memoryStream = new MemoryStream())
      {
          while (true)
          {
              int read = process__1.StandardOutput.BaseStream.Read(buffer, 0, buffer.Length);
              if (read <= 0)
                  break;
              memoryStream.Write(buffer, 0, read);
          }
          file = memoryStream.ToArray();
      }
      process__1.StandardOutput.Close();
      process__1.WaitForExit(60000);       
      int returnCode = process__1.ExitCode;
      process__1.Close();
      process__1.Dispose();
      if (returnCode == 0 || returnCode == 1)
          return file;
      else
          throw new Exception(string.Format("Could not create PDF, returnCode:{0}", returnCode));
  }