C＃类无主方法 [英] C# class without main method

问题描述

我正在学习C＃，我很新，所以请原谅我这个看似愚蠢的问题。我在Java有一些经验，我注意到，C＃程序也需要一个 main（）方法在他们的主类。

I'm learning C# and I'm very new to it, so forgive me for the seemingly stupid question. I have some experience in Java, and I noticed that C# programs also need a main() method in their main class.

如果我想创建一个不是主类的类，即我导入到主类中怎么办？

What if I want to create a class that isn't a main class, i.e. one that I import into a main class?

我试图这样做，当我编译（通过cmd使用 csc File.cs ）它会做的.exe没有 main（）方法。这是否意味着我错了，每个类需要一个 main（）方法，或者我编译错误？

I tried to do that, and when I compile (via cmd using csc File.cs) the compiler says that the .exe that it will make has no main() method. Does that mean that I was wrong, and every class needs a main() method, or that I'm compiling it wrongly?

可能是代码中的问题（因为我依靠我对Java语法的了解），看起来像这样：

Maybe the problem's in the code (since I'm relying on my knowledge of Java syntax), which looks like this:

public class Class {
    int stuff;
    public Class(int stuff) {
        this.stuff = stuff;
        stuff();
    }
    public void method() {
        stuff();
    }
}

EDIT：

I'm afraid this is terribly misunderstood. I'm not asking if the file needs a main method, I'm asking how I can import this class into another class, because I realise that if I am to do this I can't have a main (as I said, I have some Java experience), but whenever I try to compile without one the compiler tells me that I need one.

推荐答案

as MSDN States

As MSDN States

Main方法是C＃控制台应用程序或
Windows应用程序的入口点。 （库和服务不需要Main
方法作为入口点。当应用程序启动时，Main
方法是被调用的第一个方法。

The Main method is the entry point of a C# console application or windows application. (Libraries and services do not require a Main method as an entry point.). When the application is started, the Main method is the first method that is invoked.

在C＃程序中只能有一个入口点。如果你有一个
比一个类有一个Main方法，你必须编译程序
用/ main编译器选项指定使用的Main方法作为
的入口点。 p>

There can only be one entry point in a C# program. If you have more than one class that has a Main method, you must compile your program with the /main compiler option to specify which Main method to use as the entry point.

---

只有一个类需要保留 Main 方法，该类充当应用程序的入口点。

---

Only one class need to keep the Main method, the class which acts as entry point of the application.

主方法的签名是： static void Main [] args）或 static void Main（）或 static int Main（string [] args）或 static int Main（）

The signature of the main method is : static void Main(string[] args) or static void Main() or static int Main(string[] args) or static int Main()

查看此链接了解更多详情： Main（）和命令行参数（C＃编程指南）

Check out this link for more details : Main() and Command-Line Arguments (C# Programming Guide)

对于上述示例：

public class MyClassName // changed the class name, avoid using the reserved keyword :P
{
    int stuff;
    public MyClassName(int stuff)  // is the constructor
    {
        this.stuff = stuff;
    }
    public void method()
    {
        stuff = 1;
    }
}

如果您需要使用该类，一个静态类与main方法：

If you need to use that class, you can create a static class with main method:

class ProgramEntry
{

    static void Main(string[] args)
    {

        MyClassName classInstance = new MyClassName(2);
        classInstance.method();


    }

}

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