Question

我刚刚开始，我有一个问题。我如何称呼公众无效？

e.g。

int x, y = 2;   
namespace Blah
{
  public class blah blah
  {
    public void count
    {
      Console.WriteLine("Hi: " + y);
    }
    public void counting
    {
      z = x * y
    }
  }
}

P.S：我试过这个How do I call a non-static method from a static method in C#?并且它对我不起作用

Answer 1

如果它是非静态类，则需要先将其实例化。然后调用它的void方法，justCallThem（）。

public class blahblah
{

    int x, y = 2;   // this sets y as 2, but x is not set 

    public void count()
    {
        Console.WriteLine("Hi: " + y);
    }
    public void counting()
    {
        int z =  x * y;
        Console.WriteLine("Z = {0}", z);

    }

}

class Program
{
    static void Main(string[] args)
    {
        blahblah b = new blahblah(); //instantiate the object
        b.count();  //call a method on the object
        b.counting();

        Console.ReadKey();
    }

}    

// output:
// Hi: 2
// z = 0

Answer 2

您只需要通过类对象引用来调用该方法。

// Blah is a namespace
namespace Blah
{
    // blah is the class name
    public class blah
    {
        // x, y and z are member variables.
        int x, y = 2;   
        int z = 0;

        // SayHiis a public static method. Thus it dont requires the 'blah' object to call this method.
        public static void SayHi()
        {
            Console.WriteLine("Hi: " + y);
        }

        // counting is a public non static method. Thus it requires the 'blah' object to call this method.
        public void counting()
        {
            z = x * y;
        }
    }
}

// CallingMethod is the method where you want to call the counting method of class 'blah'
public void CallingMethod()
{
     // As said above, you need a object to call the 'counting' method.
     blah objBlah = new blah();

     // Now call the non static method using this object.
     objBlah.counting();

     // and here you can directly call the non-static method SayHi like,
     blah.SayHi();
}

如何在c＃中调用public void

2 个答案: