c#中virtual与override举例讲解补充(new)

点击次数：529 创建日期：10-29-2007 录入：cn-web.com 字体:[大中小] 点评：

看过上两篇文章，有朋友问如果基类中的方法不是virtual的话，派生类可不可以用new来隐藏它？我认为是可以了。

代码（还是以书举例)：

/// <summary>
/// 抽象类书
/// </summary>
public abstract class Book
{
    /// <summary>
    /// 书名
    /// </summary>
    public string bookName;

    /// <summary>
    /// 获取书名
    /// </summary>
    public string getBookName()
    {
        return "这本书名是："+bookName;
    }

    /// <summary>
    ///获取书出版社
    /// </summary>
    public string getBookCome()
    {
        return "cn-web.com出版<br>";
    }
}

/// <summary>
/// 书的派生类
/// </summary>
public class NetBook : Book
{
    /// <summary>
    /// 隐藏基类中的同名方法,new可省略
    /// </summary>
    public new string getBookName()
    {
        return bookName;
    }

    /// <summary>
    /// 隐藏基类中的同名方法,new可省略
    /// </summary>
    public new string getBookCome()
    {
        return "www.cn-web.com出版<br>";
    }
}

调用:

public class test
    {
        public test()
        {
            NetBook myNetBook = new NetBook();
        myNetBook.bookName = "asp.net开发案例<br>";
        Response.Write(myNetBook.getBookName());
        Response.Write(myNetBook.getBookCome());

        Book myBook = new NetBook();
        myBook.bookName = "asp.net基础开发<br>";
        Response.Write(myBook.getBookName());
        Response.Write(myBook.getBookCome());

        }
        public static void Main()
        {
            test t = new test();
        }
    }