C＃中实例化类从字符串 [英] c# instantiate class from string

问题描述

我有一个抽象类，我想它initalize来扩展它的类。

I have an abstract class and I want to initalize it to a class that extends it.

我有子类的字符串名字。

I have the child classes name as a string.

除了这个...

String childClassString;
MyAbstractClass myObject;

if (childClassString = "myExtenedObjectA")
    myObject = new ExtenedObjectA();
if (childClassString = "myExtenedObjectB")
    myObject = new ExtenedObjectB();

我怎样才能做到这一点？基本上，我怎么摆脱这里的if语句呢？

How can I do this? Basically how do I get rid of the if statements here?

推荐答案

看Activator.CreateInstance（）。

Look at Activator.CreateInstance().

myObject = (MyAbstractClass)Activator.CreateInstance("AssemblyName", "TypeName");

或

var type = Type.GetType("MyFullyQualifiedTypeName");
var myObject = (MyAbstractClass)Activator.CreateInstance(type);

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