Convert graphics object to bitmap object

Question

How can I convert graphics object to bitmap object using C#?

What do you want to do with it? Draw on `Graphics` object and save as image file? — TheVillageIdiot, Oct 08 '09 at 05:17

AndreyAkinshin · Answer 1 · 2009-10-08T05:22:28.663

23

Bitmap myBitmap = new Bitmap(width, height, myGraphics);

Alternatively:

Graphics myGraphics = Graphics.FromImage(myBitmap);
// some code with draw on myGraphics
myGraphics.Dispose();

edited Oct 08 '09 at 05:22

answered Oct 08 '09 at 05:16

AndreyAkinshin

5

`new Bitmap(.., my Graphics)` does **not** copy the pixels of the graphics into the bitmap, nor otherwise give access to the contents of `myGraphics`. The second solution is a solution to a different problem (somewhat the opposite of what was asked): how to draw into a bitmap using `Graphics` methods. – ToolmakerSteve Sep 22 '17 at 19:25
Once I created a [`ToBitmap`](https://docs.kgysoft.net/drawing/?topic=html/M_KGySoft_Drawing_GraphicsExtensions_ToBitmap.htm) extension exactly for this purpose. [NuGet](https://www.nuget.org/packages/KGySoft.Drawing/) and [source](https://github.com/koszeggy/KGySoft.Drawing) are both available. Remark: the `ToBitmap` extension works on Windows only. – György Kőszeg Jul 03 '21 at 10:16

score 10 · Answer 2 · edited Feb 26 '16 at 13:32

10

Do you mean System.Drawing.Graphics ? The Graphics class is a surface to an image and is already a bitmap.

What are you trying to do with it ?

using(Graphics g = Graphics.FromImage(bitmap))
{
  //draw here
}

or

Bitmap bmp = new Bitmap(100,100,graphics);

edited Feb 26 '16 at 13:32

fubo

answered Oct 08 '09 at 05:17

Andrew Keith

12

The docs just say *The Graphics object that specifies the resolution for the new Bitmap.*; doesn't quite sound like anything from the `Graphics` object is copied. – O. R. Mapper Apr 10 '13 at 13:09

score 1 · Answer 3 · edited Oct 08 '09 at 07:06

1

This looks like what you might want: DaniWeb, yes annoyingware but it does provide a working solution

edited Oct 08 '09 at 07:06

warren

answered Oct 08 '09 at 05:24

monksy

3 Answers3