Inflating color value

[Prasoon Chaudhary]

I have a very basic query. Let's say we have a Color1, and I need Color2 to be

Color.FromRgb (Math.Min(Color1.R+10,255), Math.Min(Color1.G+10,255), Math.Min(Color1.B+10,255));

But I am not able to do this simple thing. Basically, I've got stuck with integer and byte conversion. Please suggest in following code-

private Color GetNewColor(Color colorParameter)
{
Color newColor;
//Set value of newColor here
return newColor;
}

//Color1 = Color.FromRgb(255, 0, 0);
//return GetNewColor(Color1);
//It should return (255,10,10)

[Tony Richards]

What exactly is going wrong? Are you getting an exception or a compiler error or is it just not doing what you expect? One possible issue I can see is an overflow of the colour component. For example, with a byte, if you add 10 to 255 you'll actually end up with 9, and Math.Min won't work as you expect. You can catch this problem by surrounding the code with a checked statement, which will cause the runtime to throw on an overflow. The quickest solution to this would be to cast the byte to an int first, do the addition, and cast the result back to a byte (once you're certain it'll fit).

[Prasoon Chaudhary]

Thanks for the reply! Problem was with casting only. I've sorted that out now. Trivial, but just thought of sharing it:

byte r = Convert.ToByte(Math.Min(255, Color1.R + 10));
byte g = Convert.ToByte(Math.Min(255, Color1.G + 10));
byte b = Convert.ToByte(Math.Min(255, Color1.B + 10));
return Color.FromRgb(r, g, b);

[Christian Amado]

In Silverlight you can do this:

private Color GetNewColor(Color colorParameter)
{
Color newColor;
Color newcolor = Color.FromArgb(0, 255, 10, 10);
return newColor;
}

You can read this[^] too. Regards

Christian Amado MCITP | MCTS | MOS | MTA Olimpia ☆ ★★★ Please mark as answer, if it helps.