Switch Case Returns "A Constant Value is expected"

Question

I searched around, everyone else who had this problem was using the .ToString method and I am not so I am at a loss.

On the last line I get a return of "A Constant Value is expected"

I know if I remove the part where I give the enum's values it works, but that kinda defeats the purpose of me using an Enum. Any suggestions about the best way to accomplish this?

        public enum Colors
    {
        Blue = "0000FF",
        Red = "FF0000",
        Green= "00FF00"
    }
        private void colorstuff(Colors Color){
            switch (Color ){
                case Colors.Blue:

            }
        }

**EDIT So I have been made aware that ENUM's cannot have a STRING type. Can anyone suggest a method for making a SET of String Types? If I just declare

        const Blue = "0000FF",
        const Red = "FF0000",
        const Green= "00FF00"

They are not attached to one another.

Why not add the color value as an attribute on your enum and use an extension method when you need to use the string value? — BCdotWEB, Dec 16 '14 at 16:04
@ cade http://stackoverflow.com/questions/424366/c-sharp-string-enums — BCdotWEB, Dec 16 '14 at 16:06

Rikalous · Answer 1 · 2014-12-16T16:18:02.983

2

Enums are based on int data type, so you need to declare them like this:

Blue = 0x0000FF

Alternatively declare a class:

    public static class MyColours
    {
        public  const string Blue = "0000FF";
    }

edited Dec 16 '14 at 16:18

answered Dec 16 '14 at 16:06

Rikalous

4,514
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So my Enum section won't even compile? Good deal. – Cade Dec 16 '14 at 16:09
Well, `int` by default - but you can specify other integer-based types as the underlying type too. – Jon Skeet Dec 16 '14 at 16:09
The above example is just fake code to make my example. I actually need something with a string value. I need an underlying value to be a string and I would like it to work exactly like an ENUM does instead of having detached constants by just declaring const String Blue="0000FF"; How would I create a "SET" of constants that all have string values? – Cade Dec 16 '14 at 16:13
What if I create a new public class and made the sub constants public also. Does this look like a good alternative? Does anyone see any potential issues using this method? This just seems like an odd way to accomplish this.' `code public static class Colors { public String Value=""; public const String Blue = "0000FF"; public const String Red = "FF0000"; public const String Green= "00FF00"; }` – Cade Dec 16 '14 at 17:02

score 0 · Answer 2 · answered Dec 16 '14 at 16:10

0

dear you can't define enum like this , because it's int type.

 public enum Colors
    {
        Blue = 0000FF,
        Red = FF0000,
        Green= 00FF00
    }

answered Dec 16 '14 at 16:10

Wajihurrehman

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Your piece of code would not "compile". How is it supposed to answer OP's question? – xmojmr Dec 16 '14 at 21:09

Switch Case Returns "A Constant Value is expected"

2 Answers2