随着子类填充基类？ [英] Populate base class along with child class?

问题描述

我有需要，我有一些新的字段添加到现有的类及其所有现有油田/属性。

所以每当我的派生类填充DAL，我会填基类的所有领域也是如此。目前，我做它像这样，但不知道这是正确的方式？请给我一个例子。另外，我不知道基类对象是否会是一个派生类初始化一个新的每一次？

 公共类员工
    {
        私人诠释_id;
        私人诠释_name;
        公众诠释ID
        {
            集合{_id =值;}
            {返回_id;}
        }
        公众诠释名称
        {
            集合{_name =值;}
            {返回_name;}
        }
        保护无效SETNAME（）
        {
            _name =价值;
        }
        保护无效SETID（）
        {
            _id =价值;
        }
    }
公共类EmployeeWithDepartmentName：员工
        {
           私人字符串_deptName;
           公共字符串DEPTNAME
            {
                集合{_deptName =价值; }
            }
            公共setBaseEmpName（）
            {
               base.SetName（）;
            }
        公共setBaseID（）
            {
               base.SetID（）;
            }
        }
 

解决方案

一切都在一个基类可以自动的从派生类访问，而不会doiing什么，就直接使用属性/方法名。

 公共类MyBase
{
    公共字符串用户名{获取;集;}
}

公共类MyClass的：MyBase
{
  公共无效DoSomething的（）
  {
     Console.WriteLine（用户名：{0}，用户名）;
     用户名=安德斯;
  }
}
 

您也可以做到这一点：

  MyClass的MyClass的=新MyClass的（）;
myClass.UserName =符文;
 

受保护的，只有派生类可以访问属性/方法的手段。公共意味着每个人都可以访问属性/方法。

另外，我不知道基类对象是否将每个派生类进行初始化时是新的？的

这不是两个对象，它是一个对象，从两个不同的类（这是继承是如何工作的）。

创建

阅读这篇文章，关于继承： http://www.csharp-station.com/教程/ lesson08.aspx

I have a need where I have to add some new fields to an existing class along with all its existing fields/attributes.

So whenever my derived class is filled by DAL, I will be filling all fields of base class as well. Currently, I am doing it like this but not sure this is the right way ? Please give me an example. Also I am not sure whether the base class object will be a new one each time a derived class is initialized ?

public class Employee
    {
        private int _id;
        private int _name;
        public int ID
        { 
            set { _id=value;}
            get { return _id;}
        }
        public int Name
        { 
            set { _name=value;}
            get { return _name;}
        }
        protected void SetName ()
        {
            _name=value;
        }
        protected void SetID()
        {
            _id=value;
        }
    }
public class EmployeeWithDepartmentName:Employee
        {
           private string _deptName;
           public string DeptName 
            {
                set { _deptName=value; }
            }
            public setBaseEmpName()
            {
               base.SetName();
            }
        public setBaseID()
            {
               base.SetID();
            }
        }

解决方案

Everything in a base class can automagically be accessed from derived classes without doiing anything, just use the property/method name directly.

public class MyBase
{
    public string UserName {get;set;}
}

public class MyClass : MyBase
{
  public void DoSomething()
  {
     Console.WriteLine("UserName: {0}", UserName);
     UserName = "Anders";
  }
}

You can also do this:

MyClass myClass = new MyClass();
myClass.UserName = "Rune";

Protected means that only derived classes can access the property/method. Public means that everyone can access the properties/methods.

Also I am not sure whether the base class object will be a new one each time a derived class is initialized ?

It's not two objects, it's one object created from two different classes (that's how inheritance works).

Read this article about inheritance: http://www.csharp-station.com/Tutorials/lesson08.aspx

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