Added new kb article pdf--image-border

knowledge-base/pdf-image-border.md

@@ -0,0 +1,118 @@
+---
+title: Adding an Image Border in PdfProcessing
+description: Learn how to draw borders around images with the Telerik PdfProcessing library.
+type: how-to
+page_title: Drawing Borders for Images in Telerik PdfProcessing
+meta_title: Drawing Borders for Images in Telerik PdfProcessing
+slug: pdf-image-border
+tags: pdf, processing, telerik, document, image, export, border, table
+res_type: kb
+ticketid: 1698380
+---
+<style>
+img[alt$="><"] {
+  border: 1px solid lightgrey;
+}
+</style>
+
+## Environment
+
+| Version | Product | Author | 
+| ---- | ---- | ---- | 
+| 2025.3.806| RadPdfProcessing |[Desislava Yordanova](https://www.telerik.com/blogs/author/desislava-yordanova)| 
+
+## Description
+
+Learn how to add borders around [images]({%slug radpdfprocessing-model-image%}) 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]({%slug radpdfprocessing-editing-table-tablecell%}) and put the image in the cell:
+
+```csharp
+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);
+}
+``` 
+
+![Using a Table with Borders ><](images/image-table-cell-border.png)    
+
+### 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]({%slug radpdfprocessing-editing-fixedcontenteditor%}) to draw both the image and the rectangle:
+
+```csharp
+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);
+}
+```
+
+![Using a FixedContentEditor to Draw the Image Border ><](images/image-fixedcontenteditor-border.png)   
+
+## See Also
+- [FixedContentEditor]({%slug radpdfprocessing-editing-fixedcontenteditor%}) 
+- [TableCell]({%slug radpdfprocessing-editing-table-tablecell%})
+- [Images]({%slug radpdfprocessing-model-image%}) 

libraries/radpdfprocessing/model/image.md

@@ -95,3 +95,4 @@ The Image class exposes also the **GetBitmapSource()** method, enabling you to o
  * [Splitting a Large Image Across Multiple PDF Pages]({%slug split-export-large-image-multiple-pdf-pages-radpdfprocessing%})
  * [Change file size of a PDF with images through ImageCompression and ImageQuality]({%slug pdfprocessing-change-file-size-through-image-quality-and-compression%})
  * [Adding a Barcode to a PDF Document using PdfProcessing and the WinForms BarcodeView]({%slug add-barcode-to-pdf-telerik%})
+ * [Adding an Image Border in PdfProcessing]({%slug pdf-image-border%})