CODEWITHSUNDEEP
.netvb.netgenerics
JLo
JLo

Reputation: 3157

Get type of Class from generic Class(of T)

I am trying to get the Type of a class which is generic. Most questions revolve around people trying to retrieve the Type T from a List(Of T) for example. Instead I want the Type of the class itself, i.e. System.Collections.Generic.List

I am trying the following code, but it returns the Type including the generic parameter. If I then try to create an instance of the class with a different generic Type I get an error because the Type is closed.

'The type I want to use a a Generic Parameter in a new object
dim O = MasterObject 

'This is the class which is Generic    
dim BaseType as Type = me.getType 

'This is the line that errors, since BaseType already has a Generic Type
dim GenericType as Type=BaseType.MakeGenericType(O.getType())

'This would be the new object, with a new generic type
dim NewObject as Object = Activator.CreateInstance(GenericType,vars)

So is there either a way to clear a generic parameter from a Type or some way of extracting the Type without Generic Parameters?

Upvotes: 0

Views: 534

Answers (1)

Matías Fidemraizer
Matías Fidemraizer

Reputation: 64943

You can get opened one calling Type.GetGenericTypeDefinition.

BTW, if you really know that you're going to create an instance of List<T>, you can get the generic type definition using GetType(List(Of T)).

Upvotes: 1

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