I have an enum defined which stores multiple class names. Is there a way I can get the the type of an object given the enum value? The method GetObjectType when called with parameter Types.A should return the type of class A, how should it's body look like?
public class A
{
}
public class B
{
}
public enum Types
{
A = 1,
B = 2
}
public Type GetObjectType(Types type)
{
}
One simple approach is to use an explicit switch statement.
public Type GetObjectType(Types type)
{
switch (type)
{
case Types.A:
return typeof(A);
case Types.B:
return typeof(B);
}
throw new InvalidEnumArgumentException(nameof(type), (int)type, typeof(Types));
}
You just mustn't forget to add to the switch statement when a new enum value is added.
Another approach would be to get the type based on the name of the enum directly.
public Type GetObjectType(Types type)
{
// Check valid enum
if (!Enum.IsDefined(typeof(Types), type))
{
throw new InvalidEnumArgumentException(nameof(type), (int)type, typeof(Types));
}
// Build class name from Enum name. Use your correct namespace here
string className = "WindowsFormsApp1." + Enum.GetName(typeof(Types), type);
// Get type from class name
return Type.GetType(className, throwOnError: true);
}
ExhaustiveMatching from NuGet. It will give you a handy compile-time error if you don’t have exhaustive switch statements.
GetObjectType( (Types)0 )?AorB(within the enum), because we already know that the type isint. Also, theAandBthat you've declared inside the enum, have nothing to do with the classes that you've defined.