Find in struct using c#

Question

namespace Test
{
    public struct ABC
    {
        public const int x = 1;
        public const int y = 10;
        public const int z = 5;
    }
}

namespace search
{
    int A = 1;
    how to search A in struct and get variable name 'x'
}

While this is likely possible with reflection, there's a pretty good chance that your object model is wrong if you even need to do this. Can you give a non-contrived example of what you're looking to accomplish? — David, May 07 '14 at 19:52
Are you not allowed to change that struct? You'd probably be better off using array to loop through. Anywho, take a look at this: http://stackoverflow.com/questions/5873892/get-collection-of-values-from-structs-const-properties — sraboy, May 07 '14 at 20:00

score 2 · Answer 1 · answered May 07 '14 at 19:54

2

I think better option is to turn it to a enum.

public enum ABC
{
    x = 1,
    y = 10,
    z = 5
}

Then you can use Enum.GetName.

string name = Enum.GetName(typeof(ABC), 1);//Will return x

answered May 07 '14 at 19:54

Sriram Sakthivel

72,067
7
111
189

score 0 · Answer 2 · answered May 07 '14 at 19:58

        static void Main(string[] args)
    {
        FieldInfo[] myFields = typeof(ABC).GetFields();
        int A = 1;

        foreach (FieldInfo field in myFields)
            if ((int)field.GetRawConstantValue() == A)
                Console.WriteLine(field.ToString());

        Console.ReadKey();
    }

    public struct ABC
    {
        public const int x = 1;
        public const int y = 10;
        public const int z = 5;
    }

I believe this would fit your needs, however I do think you should tell us what you're trying to do (your actual scenario), so we can better assist you.

Edit: don't forget to include System.Reflection

if there is any field of different type that is not convertible to `int`, this code will throw an `InvalidCastException` — Selman Genç, May 07 '14 at 20:02

score 0 · Accepted Answer · answered May 07 '14 at 19:59

0

Using LINQ and Reflection, you can do the following:

var field = typeof (ABC)
        .GetFields()
        .FirstOrDefault(x =>x.FieldType == typeof(int) && (int)x.GetValue(null) == A);

if(field != null) Console.WriteLine(field.Name);

answered May 07 '14 at 19:59

Selman Genç

100,147
13
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Find in struct using c#

3 Answers3