Problem with enum datatype in C#

Question

1.00/5 (1 vote)

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Hi,
Following program is not compiling

using System;

namespace enum2
{
    class Program
{
    private const string V = "\n";

    private enum Days { Sun, Mon, tue, Wed, thu, Fri, Sat };
    static void Main(string[] args)
    {

        Console.Write(value: Days.Sun + V);
        Console.Write(value: Days.Sun + V);
        Days.Sun = (int)  10;//error here
        Console.Write(value: Days.Mon + V);
        Console.ReadKey();
    }
}
}

Error is

left hand-side of an assignment must be variable, property or indexer

What I have tried:

I have tried to cast the value

Posted 24-May-19 9:33am

zak100

Updated 24-May-19 9:46am

v2

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2 solutions

Solution 1

Days.Sun, for your purposes, is a "constant"; an enum value; which can only appear on the RIGHT side.

Posted 24-May-19 9:40am

Gerry Schmitz

Updated 24-May-19 9:41am

v2

Comments

[no name] 24-May-19 16:06pm

Yes a 5

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User 11060979 · Accepted Answer · 2019-05-24T09:46:00

Solution 2

Days.Sun = (int) 10;//error here
Think about what you are trying to do here...

"Days" is the enum and "Sun" is one of the enumeration values... Completly confusing...

Do you like mabye to do something like this?

int day= (int)Days.Sun

Anyway what do you expect from the value '10' from an enum in the range 0..6?

Ok, on the other hand in case you like/need to have a specific relation for your enum you can do something like this

enum Days { Sun= 4, Mon= 5, Tue= 6, Wed= 7, Thu= 8, Fri=9, Sat=10 };

Posted 24-May-19 9:46am

User 11060979

Updated 24-May-19 9:55am

v2

Comments

zak100 24-May-19 16:36pm

Hi,
Thanks. I was actually trying to do something similar but out the curly brackets which you are doing inside the curly brackets. This means we can't assign outside the curly brackets?

Zulfi.

[no name] 24-May-19 16:44pm

Thanks also. This one Days.Sun = (int) 10;you can't do either inside nor outside the curly brackets. The only way you can assign specific value for an enum element is at the time you define the enum. In this case enum Days{Sun= 4, ....
[Edit]
To make it more clear: Once defined like enum Days{Sun= 4, ... you can not change it anymore at runtime.