How do you instantiate a class given its name in C#

Question

I have over 1000 classes. The user inputs the name of the class and it is expected to create an object of that class. I do not wish to have an if .. else set of 1000 class names, but want to get an object of the class whose name is inputted.

I do not want

if (input text = "class1")

{

 return ( new class1());

}

else if (input text = "class2")

{

 return ( new class2());

}

.........................

Please help me

regards

Manoj Gokhale

Answer 1

The name must include the corresponding namespace. It can be prepended to the class name. For example:

string input = "Class3";
string name = "MyNamespace." + input;

object obj = Activator.CreateInstance( assemblyName: null, typeName: name ).Unwrap();

or

string input = "Class3";
string name = "MyNamespace." + input;

Type type = Type.GetType( name );
object obj = Activator.CreateInstance( type );

See also other forms of Activator.CreateInstance and Type.GetType.