速记访问器和突变器

问题描述

我正在学习 C#，并且正在学习如何将字段设为类私有，并使用 Getter 和 Setter 来公开方法而不是字段值.

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.

是get;set; 在 Method 1 和 Method 2 等效?例如一个是另一个的简写吗?

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; }
    }
}

最后，当您想在获取或设置值之前执行计算时，是否会使用 方法 2?例如将值转换为百分比或执行验证?例如

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; }
    }
}

推荐答案

是的，方法一是方法二的快捷方式，我建议默认使用方法一.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.

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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