C#•7mo ago

✅ Casting to enum when only having a Type object

Does anyone know how it's possible to cast while only having a Type object, and not the actual type at compile time? I've got an enum (MyEnum), and an integer value (value) I want to do the equivalent of this:

object? newValue = (MyEnum)value;

object? newValue = (MyEnum)value;

While only having access to typeof(MyEnum) and not knowing what MyEnum actually is. I had thought I could do this:

object? newValue = Convert.ChangeType(value, typeof(MyEnum));

object? newValue = Convert.ChangeType(value, typeof(MyEnum));

But this errors saying: `System.InvalidCastException: Invalid cast from 'System.Int32' to 'MyEnum'.

2 Replies

reflectronic•7mo ago

https://learn.microsoft.com/en-us/dotnet/api/system.enum.toobject?view=net-8.0

Enum.ToObject Method (System)

Converts a specified integer value to an enumeration member.

HughOP•7mo ago

aha - amazing - this looks like it's exactly what I was after. I'll give this a go. Thanks @reflectronic Yup - this is exactly what I needed. Thanks!

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✅ Casting to enum when only having a Type object