Using dynamic enum as type in a parameter of a method
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Published on 2010-05-21T08:09:07Z
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2010/05/21
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c#
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
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