Inserting HTML Content into PDF TableCell with RadPdfProcessing
Environment
| Version | Product | Author |
|---|---|---|
| 2024.4.1106.NET Standard | RadWordsProcessing-RadPdfProcessing | Desislava Yordanova |
Description
When generating PDF documents, a common requirement is to insert HTML content into specific sections of the document, such as a TableCell. This article demonstrates how to achieve this using the smooth integration between RadPdfProcessing and RadWordsProcessing libraries.
Sample HTML content to Insert
<!DOCTYPE html>
<html>
<body>
<p>I am normal</p>
<p style="color:red;">I am red</p>
<p style="color:blue;">I am blue</p>
<p style="font-size:50px;">I am big</p>
</body>
</html>
Solution
To insert HTML content into a TableCell in a PDF document, you can obtain the HTML content as an image and insert the image inside the PDF table cell. Below are the steps and complete code snippet for achieving this:
Import HTML Content: Use the RadWordsProcessing's HtmlFormatProvider to import the HTML content into a RadFlowDocument.
Export the HTML Content to PDF Format: Use the RadWordsProcessing's PdfFormatProvider to convert the
RadFlowDocumentinto PDF format.Convert the exported PDF content to an Image: Use the RadPdfProcessing's PdfFormatProvider to import the PDF-converted HTML content to RadFixedDocument and the SkiaImageFormatProvider to export the PDF pages to images.
Insert the exported Images into the PDF TableCell: Use RadPdfProcessing's FixedContentEditor to create the main PDF document with a table and insert the converted PDF images into the desired TableCell.
Inserting HTML Content as PDF
Telerik.Documents.ImageUtils.ImagePropertiesResolver defaultImagePropertiesResolver = new Telerik.Documents.ImageUtils.ImagePropertiesResolver();
Telerik.Windows.Documents.Extensibility.FixedExtensibilityManager.ImagePropertiesResolver = defaultImagePropertiesResolver;
RadFixedDocument mainPdfDocument = new RadFixedDocument();
RadFixedPage page = mainPdfDocument.Pages.AddPage();
FixedContentEditor editor = new FixedContentEditor(page);
Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider fixedPdfFormatProvider = new Telerik.Windows.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider();
//Create PDF table
Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table table = new Telerik.Windows.Documents.Fixed.Model.Editing.Tables.Table();
//Set borders
Telerik.Windows.Documents.Fixed.Model.Editing.Border border = new Telerik.Windows.Documents.Fixed.Model.Editing.Border();
table.Borders = new Telerik.Windows.Documents.Fixed.Model.Editing.TableBorders(border);
table.DefaultCellProperties.Borders = new Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCellBorders(border, border, border, border);
//Set table properties
table.Margin = new Thickness(20);
table.DefaultCellProperties.Padding = new Thickness(5);
table.BorderSpacing = 2;
//Create row
Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableRow row1 = table.Rows.AddTableRow();
Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCell imgCell = row1.Cells.AddTableCell();
imgCell.PreferredWidth = 200;
string htmlContent = File.ReadAllText("cellContent.html");
//Import HTML as RadFlowDocument
HtmlFormatProvider htmlFormatProvider = new HtmlFormatProvider();
RadFlowDocument htmlDocument = htmlFormatProvider.Import(htmlContent, TimeSpan.FromSeconds(10));
//Export HTML to PDF
Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider flowPdfFormatProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Pdf.PdfFormatProvider();
byte[] htmlToPdfByteArray = flowPdfFormatProvider.Export(htmlDocument, TimeSpan.FromSeconds(10));
//Import htmlToPdfByteArray as RadFixedDocument
RadFixedDocument htmlPdfDocument = fixedPdfFormatProvider.Import(htmlToPdfByteArray, TimeSpan.FromSeconds(10));
RgbColor bordersColor = new RgbColor(255, 0, 0);
Telerik.Windows.Documents.Fixed.Model.Editing.Border cellBorder = new Telerik.Windows.Documents.Fixed.Model.Editing.Border(2, Telerik.Windows.Documents.Fixed.Model.Editing.BorderStyle.Single, bordersColor);
Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCellBorders tableCellsBorder = new Telerik.Windows.Documents.Fixed.Model.Editing.Tables.TableCellBorders(border, border, border, border, null, null);
//Export the PDF pages as images
Telerik.Documents.Fixed.FormatProviders.Image.Skia.SkiaImageFormatProvider imageProvider = new Telerik.Documents.Fixed.FormatProviders.Image.Skia.SkiaImageFormatProvider();
string imagesFolderPath = @"..\..\..\Images\";
int count = 1;
foreach (RadFixedPage p in htmlPdfDocument.Pages)
{
byte[] resultImage = imageProvider.Export(p, TimeSpan.FromSeconds(10));
File.WriteAllBytes(imagesFolderPath + count++ + ".png", resultImage);
}
Block imageBlock;
string[] pdfFilePaths = Directory.GetFiles(imagesFolderPath);
foreach (string imageFilePath in pdfFilePaths)
{
imageBlock = imgCell.Blocks.AddBlock();
imageBlock.HorizontalAlignment = Telerik.Windows.Documents.Fixed.Model.Editing.Flow.HorizontalAlignment.Center;
imageBlock.InsertImage(new FileStream(imageFilePath, FileMode.Open),new Size(300,400));
imgCell = row1.Cells.AddTableCell();
imgCell.Borders = tableCellsBorder;
}
//Draw the generated table
editor.DrawTable(table);
string outputFile = "output.pdf";
File.Delete(outputFile);
//Export main PDF with changes
using (Stream output = File.OpenWrite(outputFile))
{
fixedPdfFormatProvider.Export(mainPdfDocument, output, TimeSpan.FromSeconds(10));
}
//Open main PDF
var psi = new ProcessStartInfo()
{
FileName = outputFile,
UseShellExecute = true
};
Process.Start(psi);
