Create graphic and save it as Bitmap

c# .net bitmap picturebox
Hesam Qodsi picture Hesam Qodsi · May 21, 2010 · Viewed 17k times · Source

I have two questions:

1) I have a PictureBox and its Dock is set to Fill. When I resize the Form I cannot create a Graphic on the part of the PictureBox that is extended. What is the problem?

2) I want to convert the Graphic that is created on the PictureBox to Bitmap and save it as *.JPG or *.bmp. How can I do this?

Answer

Alex Pacurar picture Alex Pacurar · May 21, 2010

you can use the handle device to get the bitmap out of the picture box

Graphics g = pictureBox1.CreateGraphics();          
Bitmap bitMap = Bitmap.FromHbitmap(g.GetHdc());
bitMap.Save(filePath, System.Drawing.Imaging.ImageFormat.Jpeg);

or even better, if the pictureBox does`nt modify the image, you can directly get the image from the pictureBox control 

pictureBox1.Image.Save("path", System.Drawing.Imaging.ImageFormat.Jpeg);

Related questions

Converting BitmapImage to Bitmap and vice versa

I have BitmapImage in C#. I need to do operations on image. For example grayscaling, adding text on image, etc. I have found function in stackoverflow for grayscaling which accepts Bitmap and returns Bitmap. So I need to convert BitmapImage …

Read More
Image vs Bitmap class

I have trouble understanding the differences between the Image class and the Bitmap class. Now, I know that the Bitmap inherits from the Image but from what I understand both are very similar. Can anyone shed some light on this …

Read More
Is there a good way to convert between BitmapSource and Bitmap?

As far as I can tell the only way to convert from BitmapSource to Bitmap is through unsafe code... Like this (from Lesters WPF blog): myBitmapSource.CopyPixels(bits, stride, 0); unsafe { fixed (byte* pBits = bits) { IntPtr ptr = new IntPtr(pBits); System.…

Read More