Creating an object of Generic Class with dynamically generated type

Question

I have a generic Class

public  class MyClass<T>
{
   public List<T> Translate(List<T> list, params string[] names)
           {
            //do something here,modify list and return list
       }
    }

Now i can easily create its instances like

MyClass<Employee> obj= new MyClass<Employee>(); OR
MyClass<Vehicle> obj = new MyClass<Vehicle>();

I can call my method like

    obj.Translate(Mylist of employee or vehicle type,"param1","param2")

But in my case i dont know the type T as its generated on runtime,see the code below

String classname = string.Empty;

if(Classtype == 1)
{
    classname = "Employee"
}
else if(classtype == 2)
{
    classname = "Vehicle"
}

I want something like below..so that i can creat an instance of this generic class

MyClass<typeof(classname)> empp = new MyClass<typeof(classname)>();

    empp.Translate(MyList,"param1","param2")

Please suggest,how can i do that.

Answer 1

Try

var someType = Type.GetType("MyProject.Employee");
var yourGenericType = typeof(MyClass<>).MakeGenericType(new [] { someType });
var instance = Activator.CreateInstance(yourGenericType);

Note that Type.GetType(...) only works with the full namespace of a type, or even the full assembly qualified name if your class is not in the same dll as the code that is executing this.

Answer 2

Thanks All for the Help I was able to do it by this way

        var someType = Type.GetType("MyProject.Employee");
        var genericType = typeof(Convert<>).MakeGenericType(new[] { someType });
        var instance = Activator.CreateInstance(genericType);

        string instanceType = instance.GetType().FullName;

        MethodInfo methodInfo = Type.GetType(instanceType).GetMethod("Translate");
        genericType.InvokeMember(methodInfo.Name, BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.Instance, null, instance, new object[] { lstEmp, "Name", "City" });

ishan

Answer 3

public T CreateEmptyObject<T>()
{
    return (T)Activator.CreateInstance(typeof(T));;
}

To call it:

YourClassObject yourClassObject = CreateEmptyObject<YourClassObject>();