Adding an Image Border in PdfProcessing
Environment
| Version | Product | Author |
|---|---|---|
| 2025.3.806 | RadPdfProcessing | Desislava Yordanova |
Description
Learn how to add borders around images in the generated PDF document.
Solution
To draw borders around images follow one of the approaches below:
Approach 1: Using a Table with Borders
Insert a table with a single TableCell and put the image in the cell:
RadFixedDocument document = new RadFixedDocument();
RadFixedPage page = document.Pages.AddPage();
FixedContentEditor editor = new FixedContentEditor(page);
int thickness = 3;
RgbColor bordersColor = new RgbColor(255, 0, 0);
Border border = new Border(thickness, Telerik.Windows.Documents.Fixed.Model.Editing.BorderStyle.Single, bordersColor);
TableCellBorders tableCellsBorder = new TableCellBorders(border, border, border, border, null, null);
Table table = new Table();
table.Borders = new TableBorders(border);
table.DefaultCellProperties.Borders = tableCellsBorder;
TableRow imgRow = table.Rows.AddTableRow();
TableCell imgCell = imgRow.Cells.AddTableCell();
imgCell.Borders = tableCellsBorder;
Block imageBlock = imgCell.Blocks.AddBlock();
imageBlock.HorizontalAlignment = Telerik.Windows.Documents.Fixed.Model.Editing.Flow.HorizontalAlignment.Center;
imageBlock.InsertImage(new FileStream("banner.png", FileMode.Open));
table.Draw(editor, new Rect(5, 5, page.Size.Width, page.Size.Height));
PdfFormatProvider pdfProvider = new PdfFormatProvider();
using (Stream output = File.OpenWrite(@"..\..\exported.pdf"))
{
pdfProvider.Export(document, output);
}
Approach 2: Using FixedContentEditor to Draw a Rectangle Border
An alternative approach is to draw a rectangular border around an image in a PDF using RadPdfProcessing, you can use the FixedContentEditor to draw both the image and the rectangle:
RadFixedDocument document = new RadFixedDocument();
RadFixedPage page = document.Pages.AddPage();
FixedContentEditor editor = new FixedContentEditor(page);
double thickness = 3;
double x = 10;
double y = 10;
double width = 150;
double height = 150;
string imagePath = "banner.png";
// Determine image dimensions
using (FileStream fs = new FileStream(imagePath, FileMode.Open, FileAccess.Read))
{
using (var img = System.Drawing.Image.FromStream(fs, false, false))
{
width = img.Width;
height = img.Height;
}
}
// Draw rectangle border
editor.Position.Translate(x - thickness, y - thickness);
editor.SaveGraphicProperties();
editor.GraphicProperties.StrokeColor = new RgbColor(255, 0, 0);
editor.GraphicProperties.StrokeThickness = thickness;
editor.DrawRectangle(new Rect(0, 0, width + thickness * 2, height + thickness * 2));
editor.RestoreGraphicProperties();
// Draw image
using (FileStream fs = new FileStream(imagePath, FileMode.Open, FileAccess.Read))
{
editor.Position.Translate(x, y);
}
PdfFormatProvider pdfProvider = new PdfFormatProvider();
using (Stream output = File.OpenWrite(@"..\..\exported.pdf"))
{
pdfProvider.Export(document, output);
}
