asp.net类,构造函数,方法,字段,属性学习示例

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public partial class test01 : System.Web.UI.Page
{
    class Farmer
    {
        private string name;    //字段，一般为private,用于内部的数据传送

        public Farmer()   //无参数构造函数
        {
            name = "无参数构造函数！";
        }

        public Farmer(string FName)  //有参数构造函数
        {
            name = FName;
        }

        public string Name   //属性，前面加了public才能被外部访问
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        public string NameAdd()   //方法
        {
            name = name + ",李四";
            return name;
        }

        public static string NameAddStatic() //静态方法,调用静态方法不需要实例化
        {
            Farmer myFarmer = new Farmer();
            return myFarmer.Name+",这是静态方法！";
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        Farmer farmer1 = new Farmer();
        Label1.Text = farmer1.Name;

        Farmer farmer2 = new Farmer("张三");
        Label2.Text = farmer2.Name;

        Farmer farmer3 = new Farmer("张三");
        Label3.Text = farmer3.NameAdd();

        Farmer farmer4 = new Farmer();
        farmer4.Name = "你好";
        Label4.Text=farmer4.NameAdd();

        Label5.Text = Farmer.NameAddStatic(); //调用静态方法不需要实例化
    }
}