Using C# I was trying to develop the following two. The way I am doing it may have some problem and need your kind advice. In addition, I dont know whether there is any existing method to do the same.
private static String HexConverter(System.Drawing.Color c)
{
String rtn = String.Empty;
try
{
rtn = "#" + c.R.ToString("X2") + c.G.ToString("X2") + c.B.ToString("X2");
}
catch (Exception ex)
{
//doing nothing
}
return rtn;
}
private static String RGBConverter(System.Drawing.Color c)
{
String rtn = String.Empty;
try
{
rtn = "RGB(" + c.R.ToString() + "," + c.G.ToString() + "," + c.B.ToString() + ")";
}
catch (Exception ex)
{
//doing nothing
}
return rtn;
}
Thanks.
This question is related to
c#
asp.net
rgb
system.drawing.color
You could keep it simple and use the native color translator:
Color red = ColorTranslator.FromHtml("#FF0000");
string redHex = ColorTranslator.ToHtml(red);
Then break the three color pairs into integer form:
int value = int.Parse(hexValue, System.Globalization.NumberStyles.HexNumber);
e.g.
ColorTranslator.ToHtml(Color.FromArgb(Color.Tomato.ToArgb()))
This can avoid the KnownColor trick.
I found an extension method that works quite well
public static string ToHex(this Color color)
{
return String.Format("#{0}{1}{2}{3}"
, color.A.ToString("X").Length == 1 ? String.Format("0{0}", color.A.ToString("X")) : color.A.ToString("X")
, color.R.ToString("X").Length == 1 ? String.Format("0{0}", color.R.ToString("X")) : color.R.ToString("X")
, color.G.ToString("X").Length == 1 ? String.Format("0{0}", color.G.ToString("X")) : color.G.ToString("X")
, color.B.ToString("X").Length == 1 ? String.Format("0{0}", color.B.ToString("X")) : color.B.ToString("X"));
}
If you can use C#6 or higher, you can benefit from Interpolated Strings and rewrite @Ari Roth's solution like this:
C# 6 :
public static class ColorConverterExtensions
{
public static string ToHexString(this Color c) => $"#{c.R:X2}{c.G:X2}{c.B:X2}";
public static string ToRgbString(this Color c) => $"RGB({c.R}, {c.G}, {c.B})";
}
Also:
this
to use them as extensions methods.string
instead of the class name.For hexadecimal code try this
& 0x00FFFFFF
For RGB one
Red
, Green
, Blue
valuesImplementation
private static string HexConverter(Color c) {
return String.Format("#{0:X6}", c.ToArgb() & 0x00FFFFFF);
}
public static string RgbConverter(Color c) {
return String.Format("RGB({0},{1},{2})", c.R, c.G, c.B);
}
Source: Stackoverflow.com