C#語法學習(屬性[property])

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2008/8/27
 * Time: 下午 08:29
 * 屬性(property)
 * 屬性是類和結構,接口的命名成員.
 * 它們提供了通過訪問器(accessor)讀,
 * 寫或計算私有字段值的靈活機制.
 * 
 * 屬性是這樣的成員:
 * 它們扯供靈活的機制來讀取,編寫或是計算私有字段的
 * 值.可以像使用公共數據成員一樣使用屬性,但實際上
 * 它們是稱為"訪問器"的特殊方法.這使得數據在可被輕
 * 鬆訪問的同時.仍能提供方法的安全性和靈活性.
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */
using  System;
class  User
{
     private   string  name;
     private   string  sex;
     public   void  SetName( string  values)
    {
        name = values;
    }
     public   string  GetName()
    {
         return  name;
    }
     public   void  SetSex( string  values)
    {
         if (values == " 男 "   ||  values == " 女 " )
        {
            sex = values;
        }
         else
        {
            Console.WriteLine( " 性別只能為男或是女 " );
        }
    }
     public   string  GetSex()
    {
         return  sex;
    }
     public   string  Name
    {
         get
        {
             return  name;
        }
         set
        {
            name = value;
        }
    }
     public   string  Sex
    {
         get
        {
             return  sex;
        }
         set
        {
             if (value == " 男 "   ||  value == " 女 " )
            {
                sex = value;
            }
             else
            {
                Console.WriteLine( " 性別只能為男或是女 " );
            }
        }
    }
}
class  Property
{
     static   void  Main()
    {
        User zs = new  User();
        zs.SetName( " 張三 " );
        zs.SetSex( " 男 " );
        Console.WriteLine( " 姓名: " + zs.GetName() + "   性別: " + zs.GetSex());
        zs.Name = " 李四 " ;
        zs.Sex = " 牛 " ;
        Console.WriteLine( " 姓名: " + zs.Name + "   性別: " + zs.Sex);        
    }
    
}

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2008/8/27
 * Time: 下午 09:03
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */

using  System;
class  User
{
     private   string  _name;
     private   string  _sex;
     public   string  name
    {
         get
        {
             return  _name;
        }
         set
        {
            _name = value;
        }
    }
     public   string  sex
    {
         get
        {
             return  _sex;
        }
         set
        {
             if (value == " 男 "   ||  value == " 女 " )
            {
                _sex = value;
            }
             else
            {
                Console.WriteLine( " 性別只能為男或是女 " );
            }
        }
    }
}
class  Property
{
     static   void  Main()
    {
        User zs = new  User();
        zs.name = " 李四 " ;
        zs.sex = " 牛 " ;
        Console.WriteLine( " 姓名: " + zs.name + "   性別: " + zs.sex);        
    }
    
}

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2008/8/27
 * Time: 下午 09:03
 * 屬性的四個种類:
 * 1,可讀寫(read/write)屬性:需實現get/set訪問器
 * 2,只讀(readonly)屬性:需實現get訪問器
 * 3,只寫(writeonly)屬性:需實現set訪問器
 * 4,static屬性:只能訪問靜態數據
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */

using  System;
class  User
{
     private   string  _name;
     private   string  _sex;
     public   string  name
    {
         get { return  _name;} // 讀取
         set {_name = value;} // 寫入
    }
     public   string  sex
    {
         get { return  _sex;}
         set
        {
             if (value == " 男 "   ||  value == " 女 " )
            {
                _sex = value;
            }
             else
            {
                Console.WriteLine( " 性別只能為男或是女 " );
            }
        }
    }
}
class  Property
{
     static   void  Main()
    {
        User zs = new  User();
        zs.name = " 李四 " ;
        zs.sex = " 牛 " ;
        Console.WriteLine( " 姓名: " + zs.name + "   性別: " + zs.sex);        
    }
    
}

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2008/8/27
 * Time: 下午 09:16
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */

using  System;
using  System.Windows.Forms;
class  User
{
     private   string  _name;
     private   string  _sex;
     private  DateTime _Birthday;
     public  DateTime Birthday // 只寫屬性
    {
         set
        {
             if (value < Convert.ToDateTime( " 1900-1-1 " )  ||  value.Year > DateTime.Now.Year - 3 )
                MessageBox.Show( " 年齡不合法 " );
             else
                _Birthday = value;
        }
    }
     public   int  Age // 只讀屬性
    {
         get
        {
             return  DateTime.Now.Year - _Birthday.Year;
        }
    }
     public   string  name // 讀寫屬性
    {
         get { return  _name;} // 讀取
         set {_name = value;} // 寫入
    }
     public   string  sex // 讀寫屬性
    {
         get { return  _sex;}
         set
        {
             if (value == " 男 "   ||  value == " 女 " )
            {
                _sex = value;
            }
             else
            {
                Console.WriteLine( " 性別只能為男或是女 " );
            }
        }
    }
}
class  Property
{
     static   void  Main()
    {
        User zs = new  User();
        zs.name = " 李四 " ;
        zs.sex = " 男 " ;
        zs.Birthday = Convert.ToDateTime( " 1911-1-1 " );
        Console.WriteLine( " 姓名: " + zs.name + "   性別: " + zs.sex  +   "   年齡: "   +  zs.Age);        
    }
    
}

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2008/8/27
 * Time: 下午 09:16
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */

using  System;
using  System.Windows.Forms;
class  User
{
     private   static   int  _LoginCount; // 統計訪問者人數
     public  User()
    {
        _LoginCount ++ ;
    }
     public   static   int  LoginCount // 靜態只讀屬性,只能訪問靜態成員
    {
         get
        {
             return  _LoginCount;
        }
    }


}
class  Property
{
     static   void  Main()
    {
        User zs = new  User();
        User ls = new  User();
        User ww = new  User();
        User ml = new  User();
        Console.WriteLine(User.LoginCount);    
    }
    
}