Question

public class ProducerConsumerTest {

    public static void main(String[] args) {
        CubbyHole c = new CubbyHole();
        Producer p1 = new Producer(c, 1);
        Consumer c1 = new Consumer(c, 1);
        p1.start();
        c1.start();
    }
}

class CubbyHole {

    private int contents;
    private boolean available = false;

    public synchronized int get() {
        while (available == false) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        available = false;
        notifyAll();
        return contents;
    }

    public synchronized void put(int value) {
        while (available == true) {
            try {
                wait();
            } catch (InterruptedException e) {
            }
        }
        contents = value;
        available = true;
        notifyAll();
    }
}

class Consumer extends Thread {

    private CubbyHole cubbyhole;
    private int number;

    public Consumer(CubbyHole c, int number) {
        cubbyhole = c;
        this.number = number;
    }

    public void run() {
        int value = 0;
        for (int i = 0; i < 10; i++) {
            value = cubbyhole.get();
            System.out.println("Consumer #"
                    + this.number
                    + " got: " + value);
        }
    }
}

class Producer extends Thread {

    private CubbyHole cubbyhole;
    private int number;

    public Producer(CubbyHole c, int number) {
        cubbyhole = c;
        this.number = number;
    }

    public void run() {
        for (int i = 0; i < 10; i++) {
            cubbyhole.put(i);
            System.out.println("Producer #" + this.number
                    + " put: " + i);
            try {
                sleep((int) (Math.random() * 100));
            } catch (InterruptedException e) {
            }
        }
    }
}

//主程序

namespace MyNameSpace
{
    public interface IMyInterface
    {
        string GetMethod();
    }
    public class MyClass : IMyInterface
    {
       public string GetMethod()
       {}
    }
}

如何将var ruleClass = Activator.CreateInstance(Assembly.GetExecutingAssembly().FullName, "MyNameSpace.MyClass"); if( ruleClass != null) { IMyInterface myClass = (IMyInterface)ruleClass; //throws exception. }转换为ruleClass类型，以便我可以调用其中的特定方法？

Answer 1

使用Unwrap方法。

IMyInterface myClass = (IMyInterface)ruleClass.Unwrap();

您也可以直接创建

var myClass = Activator.CreateInstance(typeof(MyClass)) as MyClass;

Answer 2

你试过这个吗？

var ruleClass = Activator.CreateInstance(typeof(MyClass));
if (ruleClass != null)
{
    var myClass = (IMyInterface)ruleClass;
    myClass.GetMethod();
}

Answer 3

您也可以尝试此选项

var typ = Type.GetType("MyNameSpace.MyClass", true);
var ruleClass = Activator.CreateInstance(typ);
        if (ruleClass != null)
        {
            IMyInterface myClass = (IMyInterface)ruleClass;
            //myClass is NULL. 
        }`

C＃将动态对象转换为接口

3 个答案: