Dear Support Team,

We found the option HtmlToPdfAutoFitMode.ScaleToFit not working in ConvertHTML,
but it's fine in ConvertUrl.

this is our code
HtmlToPdf.Options.PageSize = new System.Drawing.SizeF(16.09F, 13.52F);
HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(
0F,
0F,
16.09F,
13.52F
);

HtmlToPdf.Options.AutoFitX = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.AutoFitY = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.MinLoadWaitTime = 1000;
string htmlFile = "scale.html";

//using ConvertUrl to get PDF
HtmlToPdf.ConvertUrl(htmlFile, "scale_url.pdf");


//using ConvertHtml to get PDF
PdfDocument pdfDoc = new PdfDocument();
string text = System.IO.File.ReadAllText(htmlFile);
HtmlToPdf.ConvertHtml(text, pdfDoc);
pdfDoc.Save("scale_html.pdf");

in theory ,scale_html.pdf and scale_url should be the same,
but we found scale_url.pdf is correct and scale_html.pdf is not.

Sample Files

Please see the screen.jpg in above link.

Best Regards,
Chien Chih

ScaleToFit Still not working even when we set the option every time !!!
Please try our code and sample, ScaleToFit is not work when using HtmlToPdf.ConvertHtml()

HtmlToPdf.Options.PageSize = new System.Drawing.SizeF(16.09F, 13.52F);
HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(
0F,
0F,
16.09F,
13.52F
);

HtmlToPdf.Options.AutoFitX = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.AutoFitY = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.MinLoadWaitTime = 1000;

//using ConvertHtml to get PDF
PdfDocument pdfDoc = new PdfDocument();
string text = System.IO.File.ReadAllText(htmlFile);
HtmlToPdf.ConvertHtml(text, pdfDoc);
pdfDoc.Save("scale_html.pdf");

Best Regards,
Chien Chih

Thanks for your explanation, really help a lot , now we understand scale much better.
But there still one thing really bothered us , the scale in HtmlToPdf.ConvertHtml is not the same
as HtmlToPdf.ConvertUrl.

if you can try our sample code, you will find the ConvertUrl() using much bigger scale ratio(X and Y) than
ConvertHtml(). in our test, the result PDF difference between ConvertUrl() and ConvertHTML is very obvious,
even when we use same html file ,same parameters.

the PDF generated by ConvertUrl() is actually what we want, but sad thing is ConvertUrl() can only load HTML from file,
since our HTML is store in the MemoryStream. it seem ConvertHtml() is our only option. so scale ratio became real problem,
if you can find us a way to let ConvertHtml() work same as ConvertUrl() , that will really solve our problem.

Thanks in advance,
Chien Chih

Thanks for quick response and Yes , the difference between ConvertUrl() and ConvertHtml() doesn't make sense to us either.
we already upload sample file to dropbox.com(because we don't know how to upload to forum). can you take a look?

https://www.dropbox.com/sh/a779qcmyay4zt1c/ILsjmbxFVD#/

in this link,

scale_html.pdf - the PDF generate by ConvertHtml()
scale_url.pdf - the PDF generate by ConvertUrl()
scale.html - the source html file.
screen.jpg - the screen shot show the difference between ConvertHtml() and ConvertUrl()

our sample code

static void TestConvertUrl()
{
HtmlToPdf.Options.PageSize = new System.Drawing.SizeF(16.01F, 13.86F);
HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0F,0F,16.01F,13.86F);
HtmlToPdf.Options.AutoFitX = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.AutoFitY = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.MinLoadWaitTime = 1000;
string htmlFile = "scale.html";

//using ConvertUrl to get PDF
HtmlToPdf.ConvertUrl(htmlFile, "scale_url.pdf");
}

static void TestConvertHtml()
{
HtmlToPdf.Options.PageSize = new System.Drawing.SizeF(16.01F, 13.86F);
HtmlToPdf.Options.OutputArea = new System.Drawing.RectangleF(0F,0F,16.01F,13.86F);
HtmlToPdf.Options.AutoFitX = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.AutoFitY = HtmlToPdfAutoFitMode.ScaleToFit;
HtmlToPdf.Options.MinLoadWaitTime = 1000;
string htmlFile = "scale.html";

//using ConvertHtml to get PDF
PdfDocument pdfDoc = new PdfDocument();
string text = System.IO.File.ReadAllText(htmlFile);
HtmlToPdf.ConvertHtml(text, pdfDoc);
pdfDoc.Save("scale_html.pdf");
}

Thank you very much! problem solved!