Reflection and Generics (List) [modified]

[Guffa]

You just specify the type between the angle brackets: List<myType> lista = new List<myType>(); Now you have a list of myType objects.

--- single minded; short sighted; long gone;

[Vertyg0]

You can`t do that ! Error 1 The type or namespace name 'myType' could not be found (are you missing a using directive or an assembly reference?) D:\Documents and Settings\IvanM\My Documents\Visual Studio 2005\Projects\WindowsApplication4\WindowsApplication4\Form1.cs 24 18 WindowsApplication4

[Giorgi Dalakishvili]

He meant how to create List during runtime

#region signature my articles #endregion

[Giorgi Dalakishvili]

You can do it like this: Assembly asm = Assembly.LoadFile(@"C:\MyDll.dll"); Type myType = asm.GetType("WindowsApplication4.Class1"); Type ListType = typeof(List<>); Type ListOfMyType = ListType.MakeGenericType(myType);

#region signature my articles #endregion

[Vertyg0]

Thanks Giorgi, only one question remains how to add objects to ListOfMyType? Thanks alot!

[Giorgi Dalakishvili]

First you will need to create instance of ListOfMyType. You can do it like this: object myObject = Activator.CreateInstance(ListOfMyType); Then use InvokeMember method of Type class to invoke any method of ListOfMyType class. Here is an example from MSDN: Type.InvokeMember Method[^]

#region signature my articles #endregion

[Vertyg0]

I think that you can`t invoke Add member Code: myObject.GetType().InvokeMember("Add", BindingFlags.Public | BindingFlags.InvokeMethod, null, myObject, new object[] { myType1 } ); Error: Method 'System.Collections.Generic.List`1[[MojDll.Class1, MojDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].Add' not found.

[Vertyg0]

Ah didn`t created instance of class .... everything works now thanks !

[Giorgi Dalakishvili]

I think it should look like this: ListOfMyType.InvokeMember("Add", BindingFlags.Public | BindingFlags.InvokeMethod, null, myObject, new object[] { myType1 } );

#region signature my articles #endregion

[Giorgi Dalakishvili]

You are welcome :)

#region signature my articles #endregion

[Guffa]

I see. Why would anyone want to do that? Why not just using a List<object>? Better yet, why not make an interface that the class can implement, so that you can create a list of that interface, and don't have to use reflection for anything that has to do with the objects.

--- single minded; short sighted; long gone;