Hi there,
System.Enum.ToObject() is your friend -- here's a simple
example of (non-nested) use:
EnumBuilder enumBuilder =
moduleBuilder.DefineEnum("SomeEnum",
TypeAttributes.Public,
typeof(long));
enumBuilder.DefineLiteral("One", (long)1);
enumBuilder.DefineLiteral("Two", (long)2);
Type enumTy = enumBuilder.CreateType();
object tag = Enum.ToObject(ty, (long)2); // Two
TypeBuilder tyBuilder =
moduleBuilder.DefineType("SomeClass", TypeAttributes.Public);
FieldBuilder fiBuilder =
tyBuilder.DefineField("SomeConstant", enumTy,
FieldAttributes.Public |
FieldAttributes.Literal |
FieldAttributes.Static);
fiBuilder.SetConstant(tag);
ty = tyBuilder.CreateType();
hth
--sigbjorn
----- Original Message -----
From: "Michał Jaeschke" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, October 22, 2002 01:42
Subject: [ADVANCED-DOTNET] emit literal field of enum type
> I ask again. I'm trying emit this:
> <-----------------------------
> public class Test13_ConstLiteral
> {
> enum LiteralEnum : long
> {
> one, two
> }
> const Test13_ConstLiteral.LiteralEnum en =
> Test13_ConstLiteral.LiteralEnum.two;
> }
> ----------------------------->
> by using Refelction.Emit. It's not important if this Enum type is nested
or
> not. Problem is when:
> - field is literal
> - type of field is enum type
> - this enum type is emitted in the same assembly
>
> Here is my pseudoCode:
> <-------------------------------
> ....
> FieldBuilder fb = ....
> object val = FieldInfo.GetValue(new object())
> TypeBuilder newTypeOfValue = xxx.defineType(..);
> ...
> newTypeOfValue.CreateType()
> ..
> string stringVal = val.ToString();
> fb.SetConstant(Enum.Parse(newTypeOfValue, stringVal));
> .........
> ------------------------------->
> I've got exception (during SetConstant)
> type of exception = System.ArgumentException
> StackTrace = "at System.Enum.Parse(Type enumType, String value, Boolean
> ignoreCase)
> at System.Enum.Parse(Type enumType, String value)
> at mycode.cs:line 240"
> Message "Type must be a type provided by the runtime, not a TypeDelegator,
> etc. Parameter name: enumType"
>
> Of course I invoke CreateType() on this new TypeBuilder() , but it's not
> important if typebuilder.m_hasBeenCreated is true or false;
>
> Any idea how emit this literals?
>
You can read messages from the Advanced DOTNET archive, unsubscribe from Advanced
DOTNET, or
subscribe to other DevelopMentor lists at http://discuss.develop.com.
