在类（C＃）中访问方法

Question

I have a very simple question. This being said, I have tried to solve it by searching through stackexchange's previously answered questions but I came up short. This is because I want to know how to tell the program's entry point to access other classes.

I had previously written a simple finite state machine but the code got congested because I did not know how to break it up into classes. In my new program, I am trying to break it up so it can be better managed.

The entry point starts off by accessing the class I created, NewState() . If you run the code, you will observe that despite it compiling correctly, the function inside NewState() does not produce the Console.WriteLine statement I wanted it to.

So, my question is this:

How do I make my code access the static void State() method within the NewState class and display the Console.WriteLine statement?

Program class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Finite_State_Machine_3
{
    class Program
    {
        static void Main(string[] args)
        {
            new NewState();
        }
    }
}

NewState class:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Finite_State_Machine_3
{
    class NewState
    {
        static void State()
        {
                Console.WriteLine("Hello world");
        }
    }
}

Answer 1

The method is static, so instead of creating an instance, make the State method public and try this

static void Main(string[] args)
{
    NewState.State();
}

But if you're going to be calling it like that, you'd probably be better off putting it in the same class.

class Program
{
    static void Main(string[] args)
    {
        State();
    }

    static void State()
    {
        Console.WriteLine("Hello world");
    }
}

If you do want it in a separate class and call it from an instance of that class, you need to make the State method non-static (as well as public) and call it from the instance

class Program
{
    static void Main(string[] args)
    {
        NewState MyVariable = new NewState();
        MyVariable.State();
    }
}


class NewState
{
    public void State()
    {
        Console.WriteLine("Hello world");
    }
}

Answer 2

If it's static, then you'll call it from the class not from the instance.

So,

NewState.State()

That said, if I remember my design patterns right you actually want to be passing instances around, not using static methods.

Answer 3

您需要将方法设置为public static或internal static ，然后通过调用NewState.State()进行调用