Convert raw html code to pdf

Aspose.PDF Product Family
1

Hi, I’m trying to convert my webpage.aspx to pdf but it doesn’t look like the style/layout are being implemented on the pdf file. Can you please have a look at my code and advice on best solution. Thanks
Charlie

Dim basePath As String = “~\styles”
Dim strDocumentPath As String = “~\print\PrintTsumSummary.aspx”

Dim options As New Aspose.Html.Rendering.Pdf.PdfRenderingOptions
options.Css.MediaType = MediaType.Screen

'Declare variables
Dim strContentData As String = Nothing
Using sw As New StringWriter
'Server.Execute to get raw Html for the print page into StringWriter
Server.Execute(strDocumentPath, sw, False)
'Set strContentData to raw html
strContentData = sw.ToString
End Using

Dim doc As New Aspose.Html.HTMLDocument(strContentData, “.”)

Dim device As New PdfDevice(options, AppDomain.CurrentDomain.BaseDirectory + “tsum.pdf”)
doc.RenderTo(device)

2

@charlie.salvador

To convert your ASPX webpage to a PDF while ensuring that the styles and layout are correctly applied, you can utilize the HtmlLoadOptions class from Aspose.PDF. This class allows you to specify various options for loading HTML content, including the base path for resources like CSS files.

Here’s a refined version of your code that incorporates HtmlLoadOptions to ensure that styles are applied correctly during the conversion:

Dim basePath As String = "~\styles"
Dim strDocumentPath As String = "~\print\PrintTsumSummary.aspx"

' Initialize HtmlLoadOptions with the base path for styles
Dim htmlLoadOptions As New Aspose.Pdf.HtmlLoadOptions(basePath)

' Declare variables
Dim strContentData As String = Nothing
Using sw As New StringWriter
    ' Server.Execute to get raw Html for the print page into StringWriter
    Server.Execute(strDocumentPath, sw, False)
    ' Set strContentData to raw html
    strContentData = sw.ToString
End Using

' Create an HTML document with the loaded options
Dim doc As New Aspose.Pdf.Document(New MemoryStream(Encoding.UTF8.GetBytes(strContentData)), htmlLoadOptions)

' Set up PDF rendering options
Dim options As New Aspose.Html.Rendering.Pdf.PdfRenderingOptions()
options.Css.MediaType = MediaType.Screen

' Create a PdfDevice to render the document
Dim device As New PdfDevice(options, AppDomain.CurrentDomain.BaseDirectory + "tsum.pdf")
doc.RenderTo(device)

Key Changes:

  1. HtmlLoadOptions: This is initialized with the base path for your styles, which helps in correctly loading CSS files referenced in your HTML.
  2. MemoryStream: The HTML content is converted to a MemoryStream to create the Document object, which allows for better handling of the HTML string.

Additional Considerations:

  • Ensure that the paths to your styles and HTML files are correct and accessible.
  • If you have external resources (like images or additional CSS files), you may need to handle their loading appropriately, possibly by implementing a custom resource loader if necessary.

By following this approach, you should be able to maintain the layout and styles of your ASPX page in the generated PDF. If you encounter any specific issues with styles not being applied, consider checking the CSS rules and ensuring they are compatible with the PDF rendering engine.

For more detailed information on HtmlLoadOptions, you can refer to the official documentation here for further options and examples.

Sources:
[1]: Class HtmlLoadOptions | Aspose.PDF for .NET API Reference

3

Hi,

I’m getting an error. "renderTo is not amember of document.

Also css file is not being applied. Do i need to specify the css file name like?

Dim basePath As String = “~\styles\tsum.css”

images are also not being applied. do i need to specify or change the path?

Thanks

Charlie

4

@charlie.salvador

The ASPX format is not supported in Aspose.PDF as input format. If webpage is deployed somewhere and is accessible using the URL, you can download its rendered HTML and then feed that HTML to the API in order to generate the output PDF. In case you have another inquiry or questions, please feel free to ask.