C＃相关的构造函数和属性 [英] C# related on Constructor and Property

问题描述

我正在构建一些小的lib，我遇到了一个问题。
我想提供一个双向的解决方案，例如：

I am building some tiny lib, and I have run into a problem. I want to provide a two-way solution, for example:

我该如何做到这一点？
我得到异常抛出，因为它期望的东西...任何例子，会做是欢迎:)谢谢！

How can I accomplish this? I am getting exception thrown, because it expects something... Any example that will do is welcomed :) Thanks!

编辑：我正在执行某项，最初我的代码与此类似：

I am executing something, initially my code is similar to this one:

 System.IO.DriveInfo d = new System.IO.DriveInfo("C:"); 

我想使用我的类实现以下操作：

I want to achieve with my class the following:

Driver d = new Driver(); 
d.DriverLetter = "C:"; 

仍然得到相同的结果，我使用ManagementObjectSearch，ManagementObjectCollection和一些其他System.Management类。

And still get the same results, I use ManagementObjectSearch, ManagementObjectCollection and some other System.Management classes.

推荐答案

您需要提供两个构造函数：

You need to provide both constructors:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public string Country { get; set; }

    // Paramterless constructor  -  for   new Person();
    // All properties get their default values (string="" and int=0)
    public Person () { }

    // Parameterized constructor -  for   new Person("Joe", 16, "USA");
    public Person (string name, int age, string country)
    {
        Name = name;
        Age = age;
        Country = country;
    }
}

如果定义了参数化构造函数，不包括在内。

If you define a parameterized constructor, the default parameterless constructor is not included for you. Therefore you need to include it yourself.

从MSDN 10.10.4默认构造函数：

实例构造函数声明，会自动提供默认实例构造函数。

If a class contains no instance constructor declarations, a default instance constructor is automatically provided.

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