我经历了一个代码示例,其中我看到了创建实例的不同方式。关于OOPS&C中的编码风格#
使代码在这里
public interface IEmployee
{
System.Int32? EmployeeID { get; set; }
System.String FirstName { get; set; }
System.String LastName { get; set; }
System.DateTime DateOfBirth { get; set; }
System.Int32? DepartmentID { get; set; }
System.String FullName();
System.Single Salary();
}
public class Employee : IEmployee
{
#region Properties
public System.Int32? EmployeeID { get; set; }
public System.String FirstName { get; set; }
public System.String LastName { get; set; }
public System.DateTime DateOfBirth { get; set; }
public System.Int32? DepartmentID { get; set; }
#endregion
public Employee(
System.Int32? employeeid
, System.String firstname
, System.String lastname
, System.DateTime bDay
, System.Int32? departmentID
)
{
this.EmployeeID = employeeid;
this.FirstName = firstname;
this.LastName = lastname;
this.DateOfBirth = bDay;
this.DepartmentID = departmentID;
}
public Employee() { }
public System.String FullName()
{
System.String s = FirstName + " " + LastName;
return s;
}
public System.Single Salary()
{
System.Single i = 10000.12f;
return i;
}
}
private List<IEmployee> myList = new List<IEmployee> { new Employee(1, "John", "Smith", new DateTime(1990, 4, 1), 1),
new Employee(2, "Gustavo", "Achong", new DateTime(1980, 8, 1), 1),
new Employee(3, "Maxwell", "Becker", new DateTime(1966, 12, 24), 2),
new Employee(4, "Catherine", "Johnston", new DateTime(1977, 4, 12), 2),
new Employee(5, "Payton", "Castellucio", new DateTime(1959, 4, 21), 3),
new Employee(6, "Pamela", "Lee", new DateTime(1978, 9, 16), 4) };
,所以我只是想知道为什么代码应与IEmployee创建名单的情况下,为什么不雇员。
这里我们可以如下代码
private List<Employee> myList = new List<Employee> { new Employee(1, "John", "Smith", new DateTime(1990, 4, 1), 1),
new Employee(2, "Gustavo", "Achong", new DateTime(1980, 8, 1), 1),
new Employee(3, "Maxwell", "Becker", new DateTime(1966, 12, 24), 2),
new Employee(4, "Catherine", "Johnston", new DateTime(1977, 4, 12), 2),
new Employee(5, "Payton", "Castellucio", new DateTime(1959, 4, 21), 3),
new Employee(6, "Pamela", "Lee", new DateTime(1978, 9, 16), 4) };
它也可以....他们为何要使用IEmployee。 为什么编码器使用IEmployee而不是Employee,所以必须有一些特定的目标。所以我只需要知道使用IEmployee的目标。 我在寻找很好的解释。请指导我。谢谢。
我甚至会用IList。 ;) –
tafa
我会说 - 这是货物崇拜节目或一些程序员正面临的奇怪的技术问题。对继承也可能是不合理的恐惧。 –