如何使公共子类删除重复的代码

Question

我有两个类,一个是从CheckBoxList派生的,另一个是从DropDownList派生的.它们内部的代码完全相同.唯一的区别是我需要在我需要显示checkboxlist的地方第一个,第二个显示dropdownlist.以下是我的代码:

using System;
using System.Collections.ObjectModel;
using System.Web.UI.WebControls;

    namespace Sample
    {
        public class MyCheckBoxList : CheckBoxList
        {
            public int A { get; set; }
            public int B { get; set; }
            protected override void OnLoad(EventArgs e)
            {
                //dummy task
                Collection<int> ints = new Collection<int>();
                //........
                this.DataSource = ints;
                this.DataBind();
            }
        }
    }

第二个

using System;
using System.Collections.ObjectModel;
using System.Web.UI.WebControls;

namespace Sample
{
    public class MyDropDownList : DropDownList
    {
        public int  A { get; set; }
        public int  B { get; set; }
        protected override void OnLoad(EventArgs e)
        {
            //dummy task
            Collection<int> ints = new Collection<int>();
            //........
            this.DataSource = ints;
            this.DataBind();
        }
    }
}

现在您可以看到内部代码完全相同,我想避免.如何为它创建一个公共类以删除代码重复？

Answer 1

您可以创建第三个类

public class Entity
{
    public int  A { get; set; }
    public int  B { get; set; }
    Collection<int> GetCollection()
    {
        //dummy task
        Collection<int> ints = new Collection<int>();
        //........
        return ints;
    }
}

然后在其他类中使用

public class MyDropDownList : DropDownList
{
    public MyDropDownList() { Entity = new Entity(); }

    public Entity {get;set;}
    protected override void OnLoad(EventArgs e)
    {
        this.DataSource = Entity.GetCollection();
        this.DataBind();
    }
}