Comments on: C# GetPixel and SetPixel

By: Kevin

Kevin — Sun, 04 Jul 2010 17:56:28 +0000

PictureBox is a Control that is nothing but an image. You change it's image property which is of type Image. Image is an abstract class that Bitmap inherits from.
myPictureBox.Image = yourBitmap

By: manikandan

manikandan — Sat, 03 Jul 2010 09:24:19 +0000

hi all, i have error for calling bitmap.getpixel(x,y) when using thread;

how to convert bitmap to control ;

reply soon plz.

By: Kevin

Kevin — Sun, 20 Jun 2010 15:52:17 +0000

Has anyone found a better way of doing this? I can't believe it's not very simple.

By: mio

mio — Sat, 22 May 2010 12:42:42 +0000

Hi ! Can you help me how to get color of any pixel (at specific position) of any part of monitor while my apllication will be minimized. Thank you

By: rcolonel

rcolonel — Wed, 07 Apr 2010 11:32:06 +0000

Thank you, this is very cognitive!
For a Windows Mobile (Compact Framework) I did as follows:

[DllImport("CoreDll.dll")]
static extern int GetPixel(IntPtr hDC, int x, int y);

static public Color GetPixelColor(IntPtr hDC, int x, int y)
{
Color color = Color.Empty;
int colorRef = GetPixel(hDC, x, y);
color = Color.FromArgb(
(int)(colorRef & 0×000000FF),
(int)(colorRef & 0×0000FF00) >> 8,
(int)(colorRef & 0×00FF0000) >> 16);
return color;
}
…
brsh = new SolidBrush(GetPixelColor(e.Graphics.GetHdc(), 0, 0));
…

By: timm

timm — Mon, 22 Mar 2010 13:15:45 +0000

@VampireSilence: Make sure you have this:

using System.Runtime.InteropServices;

By: VampireSilence

VampireSilence — Mon, 22 Mar 2010 01:56:00 +0000

On each appearance of "DllImport" i get an error. It says: type- or namespace wasnt found. What can i do ?

regards
– VampireSilence

By: Joe Kerr

Joe Kerr — Wed, 07 Oct 2009 08:25:52 +0000

timm
In support of Alan I have to say that I am highlighy disappointed, you failed to write an article that doea not take reader's stupidity into account.

Seriously tim, where is you catch( e IdiotReader ) handler?

By: kingsly

kingsly — Mon, 19 Jan 2009 12:27:52 +0000

this worked fine for my application… thanks…

By: timm

timm — Tue, 02 Sep 2008 01:00:30 +0000

Alan, you are not reading my article closely. My code is to change the color of a pixel on a CONTROL, not on a bitmap. And the very last line of my article says:

"In that case, you will have to create a Bitmap from the control, then use the Bitmap's GetPixel method."