How can I recognize (.NET 2) a generic class?
Class A(Of T)
End Class
' not work '
If TypeOf myObject Is A Then
?
How can I recognize (.NET 2) a generic class?
Class A(Of T)
End Class
' not work '
If TypeOf myObject Is A Then
?
If c# it would be like this:
public class A<T>
{
}
A<int> a = new A<int>();
if (a.GetType().IsGenericType &&
a.GetType().GetGenericTypeDefinition() == typeof(A<>))
{
}
UPDATED:
It looks like this is what you really needed:
public static bool IsSubclassOf(Type childType, Type parentType)
{
bool isParentGeneric = parentType.IsGenericType;
return IsSubclassOf(childType, parentType, isParentGeneric);
}
private static bool IsSubclassOf(Type childType, Type parentType, bool isParentGeneric)
{
if (childType == null)
{
return false;
}
childType = isParentGeneric && childType.IsGenericType ? childType.GetGenericTypeDefinition() : childType;
if (childType == parentType)
{
return true;
}
return IsSubclassOf(childType.BaseType, parentType, isParentGeneric);
}
And can be used like this:
public class A<T>
{
}
public class B : A<int>
{
}
B b = new B();
bool isSubclass = IsSubclassOf(b.GetType(), typeof (A<>)); // returns true;
Public Function IsSubclassOf(ByVal childType As Type, ByVal parentType As Type) As Boolean
Dim isParentGeneric As Boolean = parentType.IsGenericType
Return IsSubclassOf(childType, parentType, isParentGeneric)
End Function
Private Function IsSubclassOf(ByVal childType As Type, ByVal parentType As Type, ByVal isParentGeneric As Boolean) As Boolean
If childType Is Nothing Then
Return False
End If
If isParentGeneric AndAlso childType.IsGenericType Then
childType = childType.GetGenericTypeDefinition()
End If
If childType Is parentType Then
Return True
End If
Return IsSubclassOf(childType.BaseType, parentType, isParentGeneric)
End Function