CODEWITHSUNDEEP
reflectiongeneric-method
user1229895
user1229895

Reputation: 2319

Pass MakeGenericMethod a Dynamic Type

I'm trying to call a generic method and need to pass it a Type dynamically. But get a compile error, 'CS0246: The type or namespace name `t' could not be found. Are you missing a using directive or an assembly reference'. Please tell me what I'm overlooking, thank you.

...in the main...

Type t = DiscoverType(field);   // returns Type given FieldInfo via Type.GetType(string)

MethodInfo method = typeof(testClass).GetMethod("MyGenericMethod", BindingFlags.NonPublic | BindingFlags.Instance);
MethodInfo generic = method.MakeGenericMethod(typeof(t));
object[] args = {field};
generic.Invoke(this, args);

the generic method...

private void MyGenericMethod<T>(FieldInfo field)
{
    field.SetValue(obj, new List<T>(objList));
}

Upvotes: 1

Views: 1258

Answers (1)

Ani
Ani

Reputation: 113452

Hard to know what exactly you are trying to do, but you can fix your compiler error like this:

MethodInfo generic = method.MakeGenericMethod(t);

You use the typeof operator to go from a type-name to a System.Type instance. In your case, you already have the System.Type instance you need so typeof isn't useful here.

Upvotes: 2

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