Create an instance of a class according to a string

Question

I have 12 classes in my project like this:

class class1
{

}

class class2
{

}

in another class I have a method that I want to create an instance of class1 or class2 according to a string:

public void MyMethod(string s)
{
//I want to create an instance of class1 if s=="class1" or class2 if s=="class2"
}

How I can do this?

See this question: http://stackoverflow.com/questions/2247598/c-sharp-instantiate-class-from-string — DasKrümelmonster, Mar 15 '14 at 11:47
http://stackoverflow.com/questions/493490/converting-a-string-to-a-class-name — David Brabant, Mar 15 '14 at 11:48
Please look at Factory Methods and the Factory Design Pattern as well. — Sourav 'Abhi' Mitra, Mar 15 '14 at 12:40

Aftab Ahmed · Accepted Answer · 2014-03-15T12:19:25.500

2

Here is a work around try this hope it will work.

First you need to pass class actual name in string, e.g if you have a class ClassA then Pass ClassA to this one it will create an instance of the class.

private object MyMethod(string className)
{
    var assembly = Assembly.GetExecutingAssembly();

    var type = assembly.GetTypes()
    .First(t => t.Name == className);

    return Activator.CreateInstance(type);
}

edited Mar 15 '14 at 12:19

answered Mar 15 '14 at 12:04

Aftab Ahmed

1,727
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15

In this case I can't access to Methods of class because it is an object. – mohammad Mar 15 '14 at 12:13
1

you got it wrong this is not object it's returning object of your desired class. – Aftab Ahmed Mar 15 '14 at 12:19
i declared this method as static that's why you wouldn't be able to access it from non-static types. Now i changed it to non-static method now it will become available to your intelli-sense. – Aftab Ahmed Mar 15 '14 at 12:25

Create an instance of a class according to a string

1 Answers1