ASP.NET

Dynamic images generator, HTTP handler

• Simple image browser
  • shows all images located in the App_Data folder and all subfolders
  • images from each folder are presented in a separate row of the table
  • for each folder there is a header containing folder's name in the table (see exemplary implementation)
• Dynamic image generation
  • the default page contains the table with images' thumbnails
  • thumbnails have size 128x128 and are dynamically generated with HTTP handler from original images (using temporary files is forbidden)
  • each thumbnail is a link to the image in its original size
  • an image in its original size has a "watermark" (text: "Copyright", font: Arial, size 48, bold)
  • the "watermark" is positioned at image's diagonal and is printed with white brush, 50% opacity
  • images with "watermarks" are dynamically generated by the HTTP handler from original images (using temporary files is forbidden)
• Test images structure: task04_App_Data.zip

• Hints:
  • Repeater class (control), Repeater.ItemDataBound event, RepeaterItem.DataItem property
  • Control.FindControl()
  • HttpServerUtility.MapPath()
  • DirectoryInfo class, FileInfo class
  • Graphics.FromImage(), GraphicsPath.AddString(), Font, Matrix, Brush, ...

• Approximate points:
  • default page [3.5]
  • HTTP handler [2.0]
  • thumbnails generation [1.5]
  • watermark generation [3.0]