Using dynamic enum as type in a parameter of a method
- by samar
Hi Experts,
What i am trying to achieve here is a bit tricky. Let me brief on a little background first before going ahead.
I am aware that we can use a enum as a type to a parameter of a method. For example I can do something like this (a very basic example)
namespace Test
{
class DefineEnums
{
public enum MyEnum
{
value1 = 0,
value2 = 1
}
}
class UseEnums
{
public void UseDefinedEnums(DefineEnums.MyEnum _enum)
{
//Any code here.
}
public void Test()
{
// "value1" comes here with the intellisense.
UseDefinedEnums(DefineEnums.MyEnum.value1);
}
}
}
What i need to do is create a dynamic Enum and use that as type in place of DefineEnums.MyEnum mentioned above.
I tried the following.
1. Used a method which i got from the net to create a dynamic enum from a list of strings. And created a static class which i can use.
using System;
using System.Collections.Generic;
using System.Reflection;
using System.Reflection.Emit;
namespace Test
{
public static class DynamicEnum
{
public static Enum finished;
static List<string> _lst = new List<string>();
static DynamicEnum()
{
_lst.Add("value1");
_lst.Add("value2");
finished = CreateDynamicEnum(_lst);
}
public static Enum CreateDynamicEnum(List<string> _list)
{
// Get the current application domain for the current thread.
AppDomain currentDomain = AppDomain.CurrentDomain;
// Create a dynamic assembly in the current application domain,
// and allow it to be executed and saved to disk.
AssemblyName aName = new AssemblyName("TempAssembly");
AssemblyBuilder ab = currentDomain.DefineDynamicAssembly(
aName, AssemblyBuilderAccess.RunAndSave);
// Define a dynamic module in "TempAssembly" assembly. For a single-
// module assembly, the module has the same name as the assembly.
ModuleBuilder mb = ab.DefineDynamicModule(aName.Name, aName.Name + ".dll");
// Define a public enumeration with the name "Elevation" and an
// underlying type of Integer.
EnumBuilder eb = mb.DefineEnum("Elevation", TypeAttributes.Public, typeof(int));
// Define two members, "High" and "Low".
//eb.DefineLiteral("Low", 0);
//eb.DefineLiteral("High", 1);
int i = 0;
foreach (string item in _list)
{
eb.DefineLiteral(item, i);
i++;
}
// Create the type and save the assembly.
return (Enum)Activator.CreateInstance(eb.CreateType());
//ab.Save(aName.Name + ".dll");
}
}
}
Tried using the class but i am unable to find the "finished" enum defined above. i.e. I am not able to do the following
public static void TestDynEnum(Test.DynamicEnum.finished _finished)
{
// Do anything here with _finished.
}
I guess the post has become too long but i hope i have made it quite clear.
Please help!
Thanks in advance!
Regards,
Samar
