Saving a ScaledRotated and Translated GDI+ graphic on a Windows Form

Question

The book Graphics Programming with GDI+ has been a very informative read but I have not found a solution for saving the graphic representation painted on a Windows Form. In my code I open an existing image and create a bitmap from it. The book clearly defines how to use the RotateFlip method and I can save the results of using that method to a new file with no problem. The book details how to use one or more transforms (Scale, Rotate, Translate) to manipulate and paint the results on a Windows Form. I can view the results and print the results with no problem. However, I have not been able to find anyway to save the results to a new image file. Any help would be greatly appreciated.

Josh · Answer

Here is the code to save the bitmap to a new file of your choice: private void file_save_Click(object sender System.EventArgs e) { SaveFileDialog saveFileDialog = new SaveFileDialog(); saveFileDialog.InitialDirectory = K:\Images; saveFileDialog.Filter = Bitmap files (*.bmp)|*.bmp|Jpeg files (*.jpg)|*.jpg|All valid files (*.bmp/*.jpg)|*.bmp/*.jpg; saveFileDialog.FilterIndex = 2; saveFileDialog.RestoreDirectory = true; if(DialogResult.OK == saveFileDialog.ShowDialog()) { main_bitmap.Save(saveFileDialog.FileName); wasSaved = true; } } If this is not what you want you just want to copy the bitmap to another bitmap then you can just use the bitmap.clone() method: Bitmap newBitmap = originalBitmap.Clone();

Mykonine · Answer

I'm taking a wild stab here but you could initialize a new bitmap and draw to that bitmap instead of the form.

Saving a Scaled,Rotated and Translated GDI+ graphic on a Windows Form