Use a System.Type in Generics?

[cmay]

Is this something you are not allowed to do?

I basically want to create an instance of a generic class where the
type T is not know at compile time.

e.g.

dim s as System.Type = GetMyType()
dim o as MyObj(Of s)
I have not found a way to do this, so I am guessing it is not possible.

[Herfried K. Wagner [MVP]]

"cmay" <cm**@walshgroup.com> schrieb:

I basically want to create an instance of a generic class where the
type T is not know at compile time.

e.g.

dim s as System.Type = GetMyType()
dim o as MyObj(Of s)

\\\
Dim GenericType As Type = GetType(List(Of ))
Dim ParameterTypes() As Type = {GetType(Integer)}
Dim o As Object = _
Activator.CreateInstance( _
GenericType.MakeGenericType(ParameterTypes) _
)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[cmay]

Thanks HKW!
Herfried K. Wagner [MVP] wrote:

"cmay" <cm**@walshgroup.com> schrieb:

I basically want to create an instance of a generic class where the
type T is not know at compile time.

e.g.

dim s as System.Type = GetMyType()
dim o as MyObj(Of s)

\\\
Dim GenericType As Type = GetType(List(Of ))
Dim ParameterTypes() As Type = {GetType(Integer)}
Dim o As Object = _
Activator.CreateInstance( _
GenericType.MakeGenericType(ParameterTypes) _
)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Cor Ligthert [MVP]]

Herfried,

I am curious how I can use this Generic List of a typed class, while I don't
know the members of the class?

Can you give me an example?

Cor

"Herfried K. Wagner [MVP]" <hi***************@gmx.at> schreef in bericht
news:Of**************@TK2MSFTNGP02.phx.gbl...

"cmay" <cm**@walshgroup.com> schrieb:

I basically want to create an instance of a generic class where the
type T is not know at compile time.

e.g.

dim s as System.Type = GetMyType()
dim o as MyObj(Of s)

\\\
Dim GenericType As Type = GetType(List(Of ))
Dim ParameterTypes() As Type = {GetType(Integer)}
Dim o As Object = _
Activator.CreateInstance( _
GenericType.MakeGenericType(ParameterTypes) _
)
///

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>

[Herfried K. Wagner [MVP]]

"Cor Ligthert [MVP]" <no************@planet.nl> schrieb:

I am curious how I can use this Generic List of a typed class, while I
don't know the members of the class?

The problem is that you can only do that using reflection because 'List(Of
X)' is not a 'List(Of )'. Thus I do not think that the solution I posted
makes much sense because generics are mainly a compile-time feature and the
compile-time advantages are lost when using reflection.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://classicvb.org/petition/>