c# why not taking enum=1

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1.00/5 (2 votes)

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C#

class Query3
{
    enum Foo
    {
        mon,
        tue
    };

    static void Main()
    {
        Foo f =1;       
        Console.WriteLine(f);
        Console.ReadLine();
    }
}

Hello,
I want to know, why "Foo f=1" is giving Error.
please help.....

Thanks in advance...

Posted 5-Jul-11 23:44pm

Amruta c12

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Keith Barrow · Answer 1 · 2011-07-05T23:49:00

Short answer, 1 isn't of type Foo even though Foo has a value of 1. You aren't a VB dev by any chance? The reason I say this is the enum is 0-based in .net so tue is 1, not mon (which is 0), but I digress. To fix your code is simple:

Foo f =(Foo)1;

Though there are lots of circumstances where the above is useful, it is more usual to do

Foo f =Foo.tue;

walterhevedeich · Answer 2 · 2011-07-05T23:54:00

Solution 3

Because you didnt cast int to enum. What you need to do first is cast it, like this

Foo f = (Foo)1;

This however, will give you two because enums are zero based. So you might want to modify your code like this.

C#

enum Foo
{
    mon=1,
    tue=2
};

Posted 5-Jul-11 23:54pm

walterhevedeich

#realJSOP · Answer 3 · 2011-07-05T23:49:00

Solution 2

You can't directly assign an enum an integer value. Look at this tip. It shows a better way to assign an enum variable to an integer.

Setting Enumerators From Questionable Data Sources (for C# and VB)[^]

Posted 5-Jul-11 23:49pm

#realJSOP

2irfanshaikh · Answer 4 · 2011-07-06T00:03:00

Solution 4

Amruta,

1 is an Integer. And Foo of type Enum.

Can we assign string value into an integer variable without type casting? No.

In same way we cannot do this.

Read Boxing and Unboxing.

Posted 6-Jul-11 0:03am

2irfanshaikh