4
I own a string with the page’s HTML, is there any way to save it as an image? Render the whole page as an image, and if possible, store it in an MemoryStream.
2 answers
3
Htmlrenderer
It is a C#library. I recommend it because it does not need anything else besides the DLL itself, without other dependencies, if you want to save in image.
Example (withdrawn from here, in English):
namespace HtmlToBmpImageDemo
{
class Program
{
static void Main(string[] args)
{
Bitmap m_Bitmap = new Bitmap(400, 600);
PointF point = new PointF(0, 0);
SizeF maxSize = new System.Drawing.SizeF(500, 500);
HtmlRenderer.HtmlRender.Render(Graphics.FromImage(m_Bitmap),
"<html><body><p>This is a shitty html code</p>"
+ "<p>This is another html line</p></body>",
point, maxSize);
m_Bitmap.Save(@"C:\Test.bmp }
}
}
I also recommend this library because they have direct save support in *.pdf. Get a Nuget search for HtmlRenderer.PdfSharp.
Example (withdrawn from here, in English)
public static Byte[] PdfSharpConvert(String html)
{
Byte[] res = null;
using (MemoryStream ms = new MemoryStream())
{
var pdf = TheArtOfDev.HtmlRenderer.PdfSharp.PdfGenerator.GeneratePdf(html, PdfSharp.PageSize.A4);
pdf.Save(ms);
res = ms.ToArray();
}
return res;
}
wkhtmltopdf
wkhtmltopdf encapsulates a console application for the .NET. According to their page on Github, It is simple to convert HTML to PDF using the tool.
I won’t go into it because there is already an answer talking about it.
He is protected by LGPL, So I recommend you take a look, depending on your case, it could be a complication. Of course, reading the official license "contract" is critical, but there are some tools that can help you, such as Choose a License, which I find quite reliable. Another curious fact about the site is that he is opensource.
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So, I was already trying to convert the html directly to PDF, but it does not load all CSS, because there is no support at all, then the layout gets all messy.
2
The easiest way for you to achieve this is by using an external utility, in case the WKHtmlToImage.
To do so, you will need to write your HTML on disk, using the System.IO.File.WriteAllText(string path, string contents).
The second step is to instantiate a System.Diagnostics.Process, set the processo.StartInfo.FileName to the place where the WKHtmlToImage and pass the appropriate arguments through processo.StartInfo.FileName
if you need to know what arguments are expected by WKHtmlToImage, you can consult the Manual, although in your case, I believe that wkhtmltoimage <input file> <output file> will be enough.
When the process is finished, you can read the disk image.
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There wouldn’t be any I could save html to a string and then convert it to an image without needing to download?
Browser other questions tagged c# html image pdf-generation
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What’s the point of doing this?
– Woss
I need to convert it to a PDF, I tried to convert straight from HTML only iTextSharp n is compatible with all the css used, so I thought to convert html to image and then convert the image to PDF.
– Brayan
See if this online feature helps you Convert HTML to PDF
– Thiagopsw