VB.Net中文教程(1) 类别与封装性

VB.Net中文教程(1) 类别与封装性

别的「程序成员」(Procedure Member)

类别 (Class)之任务是把资料(Data)和程序(Procedure)组织并封装起来。类别告诉计算机﹕「其对象应含有那些资料、应含有那些程序裨处理外界传来之讯息」。类别须详细说明它的资料及程序﹐我们称此资料是类别之「资料成员」(Data Member) ﹔而称此程序是类别之「程序成员」(Procedure Member)。有关类别内容之叙述﹐就是所谓的类别定义(Class Definition)。类别定义之格式为──

类别之用途为﹕宣告对象。例如﹕

@#ex01.bas

Imports System.ComponentModel

Imports System.Drawing

Imports System.WinForms

@#----------------------------------------------------

Class Tree

Public varity As String

Public age As Integer

Public height As Single

End Class

@#-----------------------------------------------------

Public Class Form1

Inherits System.WinForms.Form

Public Sub New()

MyBase.New()

Form1 = Me

@#This call is required by the Win Form Designer.

InitializeComponent()