速记访问器和变异器 [英] Shorthand Accessors and Mutators

问题描述

我正在学习C＃，并且正在学习如何将字段设置为私有类，并使用Getters和Setter来公开Methods而不是字段值。

code>获得;在方法1 和方法2 中设置等价？例如是另一种简写形式吗？

  class Student 
 {
 //实例字段
私人字符串名称; 
 private int mark; 
 
 //方法1 
 public string Name {get;组; } 
 
 //方法2 
 public int Mark 
 {
 get {return mark; } 
 set {mark = value; } 
} 
} 
  

最后，方法2 <当你想要例如在获取或设置一个值之前执行计算时使用它？例如将价值转换为百分比还是执行验证？例如

  class Student 
 {
 //实例字段
私有字符串名称; 
私人双标; 
 private int maxMark = 50; 
 
 //方法1 
 public string Name {get;组; } 
 
 //方法2 
 public double Mark 
 {
 get {return mark; } 
 set {if（mark <= maxMark）mark = value / maxMark * 100; } 
} 
} 
  

解决方案

是的，方法1是方法2的快捷方式。我建议默认使用方法1。当您需要更多功能时，请使用方法2.您还可以为get和set指定不同的访问修饰符。

I am learning C#, and am learning about making fields private to the class, and using Getters and Setters to expose Methods instead of field values.

Are the get; set; in Method 1 and Method 2 equivalent? e.g. is one a shorthand of the other?

class Student
{
    // Instance fields
    private string name;
    private int mark;

    // Method 1
    public string Name { get; set; }

    // Method 2
    public int Mark
    {
        get { return mark; }
        set { mark = value; }
    }
}

Finally, would Method 2 be used when you want to for example perform a calculation before getting or setting a value? e.g. converting value to a percentage or perform validation? e.g.

class Student
{
    // Instance fields
    private string name;
    private double mark;
    private int maxMark = 50;

    // Method 1
    public string Name { get; set; }

    // Method 2
    public double Mark
    {
        get { return mark; }
        set { if ( mark <= maxMark ) mark = value / maxMark * 100; }
    }
}

解决方案

Yes, Method 1 is a shortcut to Method 2. I suggest using Method 1 by default. When you need more functionality, use Method 2. You can also specify different access modifiers for get and set.

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