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Henriette van de Haar
Henriette van de Haar

Reputation: 120

Extract color name from a System.Windows.Media.Color

How do I extract the name of a color (e.g. "green") from a System.windows.Media.Color object? The .tostring() method gives me the hex format #ff008000.

Upvotes: 1

Views: 4493

Answers (4)

Anyone
Anyone

Reputation: 314

This will return the English color name if it is defined:

Function GetName(color As Media.Color) As String
  Dim c = System.Drawing.Color.FromArgb(color.A, color.R, color.G, color.B)
  Return System.Drawing.ColorTranslator.ToHtml(c)
End Function

Upvotes: 0

Henriette van de Haar
Henriette van de Haar

Reputation: 120

My Visual Basic translation is like this:

   Function GetColorName(ByVal col As System.Windows.Media.Color) As String

    Dim coltype As System.Type = GetType(System.Windows.Media.Colors)
    Dim colproplist() As PropertyInfo = coltype.GetProperties

    Try

        Dim colorproperty As PropertyInfo = colproplist.FirstOrDefault(Function(p As PropertyInfo) Color.AreClose(p.GetValue(col, Nothing), col))

        Return colorproperty.Name

    Catch ex As Exception

        Return ("unnamed color")

    End Try

End Function

I had to catch a nullreference exception, when executing this function with an unnamed color. Why, I do not know.

Upvotes: 0

user128300
user128300

Reputation:

You could use reflection to get the color names:

static string GetColorName(Color col)
{
    PropertyInfo colorProperty = typeof(Colors).GetProperties()
        .FirstOrDefault(p => Color.AreClose((Color)p.GetValue(null), col));
    return colorProperty != null ? colorProperty.Name : "unnamed color";
}

The following code shows how to use GetColorName():

Color col = new Color { R = 255, G = 255, B = 0, A = 255 };
MessageBox.Show(GetColorName(col)); // displays "Yellow"

Please note that the above GetColorName() method is not very fast, since it uses reflection. If you plan to make many calls to GetColorName(), you probably should cache the color table in a dictionary.

Upvotes: 9

Afzaal Ahmad Zeeshan
Afzaal Ahmad Zeeshan

Reputation: 15860

In the WPF, the hex code stands just as it were rgba.

#ff008000

Would be

rgba(255, 0, 80, 0); // last 2 00s are for alpha filter.

If that's the result. You should use switch statement to convert it to some String value. Also, .ToString() method doesn't generate a Human readable String result like Green. It just converts the result to a String while passing the value to methods and function that would require a String argument.

The following code would do the trick for you:

var converter = new System.Windows.Media.BrushConverter();
var brush = (Brush) converter.ConvertFromString("#ff008000");

Use the brush now.

Upvotes: 0

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