Question

I have recently started a development in c# and want to use reflection in following situation.
If I have a Enum class as

Enum Operation
{
  Read=0;
  Write;
} 

If I give input as

String str = "Operation.Write";

I shoud be able to get output as 1;

Or

if constants are defined like

const int Read=0;
const int Write=1;

If the input is

String str = "Read";

output should be 0

Please Help.

Answer 1

Heres the complete code to also Get the type of the Enum through Reflection without hardcoding it. The ParseConstant Method is also generic, s.t. you can use if for every Type.

    namespace MyNamgespace
{
    public enum Operation
    {
        Read = 0,
        Write
    }

    public class ClassWithConstants
    {
        public const int Read = 0;
        public const int Write = 1;
    }

    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine((ParseEnum("Operation.Write")));
            Console.WriteLine((ParseContant<ClassWithConstants>("Write")));
            Console.ReadLine();
        }

        static int ParseEnum(string enumValue)
        {
            var typeName = enumValue.Split('.')[0];
            var valueName = enumValue.Split('.')[1];

            var enumType = Type.GetType(string.Format("MyNamespace.{0}", typeName));
            var op = (Operation) Enum.Parse(enumType, valueName);

            return (int)op;
        }


        static int ParseContant<T>(string constantName)
        {
            var type = typeof (T);
            var field = type.GetField(constantName, BindingFlags.Static | BindingFlags.Public);
            return (int)field.GetValue(null);
        }
    }
}