Casting to Type from Type Object

Question

Consider my code:

public class MyClass { //... } object ob = new MyClass(); Type t = ob.GetType();

With this information, I need to cast ob to MyClass at run-time. How do I do this?

Millions of similar questions on SO ;) Why don't you know the type of your objects at compile time? — Tim Schmelter
– Tim Schmelter, Commented Dec 18, 2012 at 9:57
To cast ob to type MyClass just use (MyClass)ob. But is this what you're asking? — Richard Ev
– Richard Ev, Commented Dec 18, 2012 at 9:58
@DominicKexel, Why I need this: Simple, I have a list of class names from which I want to create object of them, one by one. — Babu James
– Babu James, Commented Dec 18, 2012 at 10:18

Honza Brestan · Accepted Answer · 2012-12-18 10:06:46Z

Convert.ChangeType is what you are looking for.

// With ob and t from your example. var myClassInstance = Convert.ChangeType(ob, t);

But as some people suggest, it would be good to know why do you need this in the first place. Chances are there's a smell in your approach to the problem and it can be done easier, without any type kung-fu.

This I have tried, but ChangeType method is gonna return type Object, not the type I want

CuccoChaser · Accepted Answer · 2012-12-18 10:12:25Z

0

Assuming that MyClass is known at compile time:

object ob = new MyClass(); if (ob.GetType() != typeof(MyClass)) MyClass convertedObject = (MyClass)ob;

edited Dec 18, 2012 at 10:12

answered Dec 18, 2012 at 9:59

CuccoChaser

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3 Comments

Tim Schmelter Over a year ago

I assume that OP doesn't know at compile time that it's a MyClass because he uses GetType.

CuccoChaser Over a year ago

@TimSchmelter made the edit to check first if ob is a type of MyClass

Tim Schmelter Over a year ago

Then @Blachshma's approach is better. But both of you are assuming that the type MyClass is known at compile time.

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