在列表-OOP-泛型列表中使用数组

本文关键字:列表 数组 泛型 -OOP- | 更新日期: 2023-09-27 18:27:03

我创建了一个列表:

List<Employee> employees = new List<Employee();

我想实现这一点:

Employee e1 = new Employee(Job.Employee, "Name", "C Sharp", "Oracle", "SQL");

我现在有这个:

Employee e1 = new Employee(Job.Employee, "Name", Skills.CSharp);

这是Employee类内的代码

public enum Job { Employee, Supervisor, Administrator };
public enum Skills {CSharp, SQL, PHP, Javascript, Web, Python, Oracle, CPlus, Perl };
protected Job job;
protected String employeeName;
protected String employeeName;
public Job Job
{
    get { return job; }
    protected set { job = value; }
}
public String EmployeeName
{
    get { return employeeName; }
    protected set { employeeName = value; }
}
public Skills Skills
{
    get {return skills; } 
}

我希望能够输入尽可能多的"技能",因为目前,在员工e1中只能输入一项技能,因为我使用了枚举。

如何在列表/构造函数中放入一组"技能"?

在列表-OOP-泛型列表中使用数组

您可以使用params数组参数将可变数量的Skills参数传递给构造函数:

public Employee(Job job, string name, params Skills[] skills)

您还必须修改skills字段以容纳Skills的集合,而不是单个集合。如果在创建员工后不添加/删除技能,则可以将其设置为数组;如果需要修改集合,则可以设置为IList<Skills>

例如:

public class Employee
{
    private List<Skills> _skills;       // skills stored as a private List 
                                        // to allow modification inside Employee class
    public Employee(Job job, string name, params Skills[] skills)
    {
        _skills = new List<Skills>(skills);
        ...
    }
    public IReadOnlyList<Skills> Skills // publicly visible as a read-only list
    {
        get { return _skills.AsReadOnly(); }
    }
    ...
}

作为传递Skills[]的替代方案,您可以将enum更改为员工所具备技能的一个小面具:

[Flags]
enum Skills
{
   None = 0,
   CSharp = 1 << 0,
   SQL = 1 << 1,
   PHP = 1 << 2,
   Javascript = 1 << 3,
   ...
}

然后,可以将个人技能按位或位组合在一起,以创建单个员工所具备的技能:

Employee e1 = new Employee(Job.Employee, "Name", Skills.CSharp | Skills.SQL | Skills.PHP );

然后,为了检查员工是否具有特定技能,可以使用Enum.HasFlag方法,例如:

if( e1.Skills.HasFlag( Skills.CSharp ) )