How to convert Hexadecimal Color to RGB color (24 Bit)

Question

I use C# and asp.net 4.

How to convert and Hexadecimal Color in an equivalent RGB Color?

Example: FF0000 to 255,0,0.

My aim is to pass this color to the method FromArgb namespace System.Drawing

FromArgb Method (Int32, Int32, Int32) (Alpha is implicit as opaque)

At the moment I use this code to Clear and Image and apply a opaque flat color:

System.Drawing.Graphics.Clear(System.Drawing.Color.Red));

This works fine with predefined color like "Red", "Black" and so on, but not obviously with a Custom more precise color.

Any ideas? Thanks for your help!

Resource:

score 6 · Answer 1 · answered Apr 05 '11 at 14:42

6

Why don't you just do this?

System.Drawing.Color myColor = System.Drawing.Color.FromArgb(0xFF0000);

answered Apr 05 '11 at 14:42

Edwin de Koning

How to pass it to the Clear() Method? – GibboK Apr 05 '11 at 14:56
@GibboK: System.Drawing.Graphics.Clear(myColor); – Hans Keﬆing Apr 05 '11 at 14:57
Hi I try but does not work. I mean no error and the color it is there but maybe the Clear() method is not my option. What I can use instead? – GibboK Apr 05 '11 at 15:02
In this format it is working: System.Drawing.Graphics.Clear(System.Drawing.Color.Red)); if I pass instead the color as you suggest so System.Drawing.Graphics.Clear(myColor) does NOT work. Any Ideas? – GibboK Apr 05 '11 at 15:04
@GibboK: What do you mean by 'does not work'? Are you getting an exception or do you not see the color? – Edwin de Koning Apr 05 '11 at 15:56
No exceptions just I do not see the color. I also try to debug it and I can see the color in Clear(myColor) but just does not work. What could be? Thanks for your time :-) – GibboK Apr 05 '11 at 16:14
@GibboK: What type of graphics object do you call clear on? Do you do so inside a Paint EventHandler? – Edwin de Koning Apr 05 '11 at 16:27
I do not use Paint EventHandler. I use Object Image System.Drawing.Bitmap. My code is wrapped in a Class in ASP.NETWebForm. – GibboK Apr 05 '11 at 18:11

score 0 · Answer 2 · edited May 23 '17 at 11:51

0

edited May 23 '17 at 11:51

Community

answered Apr 05 '11 at 14:43

Ed Chapel

2 Answers2