c# Bitmap.Save transparancy doesn’t save in png

by

Are you sure the pixel format of the Bitmap is System.Drawing.Imaging.PixelFormat.Format32bppArgb? I just stumbled on this question because I was having the same problem, but it was because I was loading an image which had no alpha component to its pixel format. I did

Bitmap output = original.Clone(rect, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

and it properly saved the PNG with the alpha component.

Also, if you’re using MakeTransparent() be sure that the color you’re making transparent exists in your image.

More Related Contents:

  1. C# – How to change PNG quality or color depth
  2. How to create bitmap from byte array?
  3. Combine two Images into one new Image
  4. Problems overwriting (re-saving) image when it was set as image source
  5. C# – Loading an indexed color image file correctly
  6. How can I check the color depth of a Bitmap?
  7. C# – Convert WPF Image.source to a System.Drawing.Bitmap
  8. How can I capture as bitmap only what a picturebox is displaying, without using “copy from screen”?
  9. Saving image to file
  10. How to Display a Bitmap in a WPF Image [duplicate]
  11. Sharpen on a Bitmap using C#
  12. How can I read image pixels’ values as RGB into 2d array?
  13. How do I put an image in VisualStudio with C#? [closed]
  14. High Quality Image Scaling Library [closed]
  15. Convert an image (selected by path) to base64 string
  16. How can I insert an image into a RichTextBox?
  17. Is there a good way to convert between BitmapSource and Bitmap?
  18. Image sequence to video stream?
  19. Create Bitmap from a byte array of pixel data
  20. “Parameter not valid” exception loading System.Drawing.Image
  21. Zoom and translate an Image from the mouse location
  22. Can itextsharp.xmlworker render embedded images?
  23. Loading image from code using relative path in Windows Forms
  24. Image.FromStream() method returns Invalid Argument exception
  25. How to save workbook without showing save dialog with Excel interop?
  26. Resize image in WPF
  27. Drawing a Long String on to a Bitmap results in Drawing Issues
  28. Placing Images and Strings with a C# Combobox
  29. How to convert Bitmap to a Base64 string?
  30. How to compare a Color by the GetPixel Method and a Color passed in a method like Color.Black?

Leave a Comment