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制作与结构实例交互的方法

interaction multiple-instances properties struct c#

Daniel · 技术社区 · 8 年前

我们在类中遍历了结构,我们的任务是在结构内创建一个方法,该方法可以更改实例的字段。例如,如果另一个人是经理,则更改其姓名。

struct Employee 
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FullName
    {
        get => FirstName + LastName;
    }
    public int Age { get; set; }
    public string Role { get; set; }
    public double Salary { get; set; }
    public bool IsManager { get; set; }

    public static void EditInfo(ref Employee e1, ref Employee e2)
    {
        if (e1.IsManager)
        {
            Console.WriteLine($"Feel free to set {e2.FirstName}'s info: ");
            e2.FirstName = Console.ReadLine();
            e2.LastName = Console.ReadLine();
            Console.WriteLine($"From now on thy name is {e2.FullName}!");
        }
        else if (e2.IsManager)
        {
            Console.WriteLine($"Feel free to set {e1.FirstName}'s info: ");
            e1.FirstName = Console.ReadLine();
            e1.LastName = Console.ReadLine();
            Console.WriteLine($"From now on thy name is {e1.FullName}!");
        }
    }
}

1 回复 | 直到 8 年前

Koby Duck 8 年前

编辑: 澄清

private set; EditInfo 实例方法。这或多或少对每个人都有好处 Employee

public class Employee
{
    public Employee(string firstName, string lastName, bool isManager, ...)
    {
        FirstName = firstName;
        LastName = lastName;
        IsManager = isManager;
        // remaining properties...
    }

    public string FirstName { get; private set; }
    public string LastName { get; private set; }
    public bool IsManager { get; private set; }
    // remaining properties...

    public void Edit(Employee requester)
    {
        if (requester.IsManager) {
            // query input from the user, make changes, and notify the user.
        } else {
            // notify the user that he doesn't have permission to edit this employee. 
        }
    }
}

因此,使用它就成了:

var manager = new Employee("Your", "Boss", isManager: true);
var sheep = new Employee("John", "Doe", isManager: false);

sheep.Edit(manager); // Essentially says "edit sheep using manager as permission".

其次,除非你的教练禁止你使用 class ref 声明。 struct 裁判 在正确的环境中非常有用,但除非你知道权衡和严格编码,否则很容易引入错误,考虑到你的经验水平,很难推理。

裁判 关键字。另一方面,结构确实在没有 裁判

总之,更喜欢上课除非您有充分的理由使用结构(即GC性能、非常特殊的用途类型)。最重要的是,目标是可读性。