如何实例化一个给定字符串名称的类? [英] How do I instantiate a class given its string name?

问题描述

我有一个抽象类，我想将它初始化为一个扩展它的类.

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

我将子类名称作为字符串.

I have the child classes name as a string.

除此之外...

String childClassString;
MyAbstractClass myObject;

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

我该怎么做?基本上我如何摆脱这里的 if 语句?

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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