How can I instantiate an object from a string containing its classname?

Question

I have the following qualified class name stored in a string:

string className="Project.LogicLayer.FunctionsLayer.Medic";

Now I need a new instance of the class from using that string.

I tried this but it always returns null:

Type t=Type.GetType(className);
object = Activator.CreateInstance(t);

how about `System.Reflection.Assembly.GetExecutingAssembly().CreateInstance(string className)` ? — esiprogrammer, Mar 30 '16 at 21:53
[Create an instance of a class from a string](http://stackoverflow.com/questions/223952/create-an-instance-of-a-class-from-a-string) — Reza Aghaei, Mar 30 '16 at 21:55
Is the class in the same assembly as you are calling Activator.CreateInstance? and is variable t null or not null? — Glen Thomas, Mar 30 '16 at 21:57
@Glen Thomas HAHA! It's been a way to long of day at work. I was thinking classname.GetType(). Removing my comment — JSON, Mar 30 '16 at 22:17

score 4 · Accepted Answer · answered Mar 30 '16 at 22:01

4

Try this overload of Activator.CreateInstance

Activator.CreateInstance("MedicAssembly", "Project.LogicLayer.FunctionsLayer.Medic");

answered Mar 30 '16 at 22:01

Colin Grealy

Thanks, now it works, I have based in your example. `Assembly asm = Assembly.LoadFrom("C:\\Projec\\AppMedical\\packages\\BussinessLayer\\lib\\net451\\Buessinesslayer.dll"); Type t = asm.GetType(Project.LogicLayer.FunctionsLayer.Medic); var obj = Activator.CreateInstance(t);` – MagnunStalin Mar 30 '16 at 22:40

1 Answers1