VB.Net学习地址

VB.Net的集成开发环境（IDE）

• Visual Studio 2013（VS）

  一个VB.Net程序主要由以下几部分组成：

• 命名空间声明 Namespace declaration
• 一个类或模块 A class or module
• 一个或多个程序 One or more procedures
• 变量 Variables
• 主过程 The Main procedure
• 语句和表达式 Statements & Expressions

• 注释 Comments

打印单词“Hello World”

Imports SystemModule Module1   'This program will display Hello World    Sub Main()      Console.WriteLine("Hello World")      Console.ReadKey()   End SubEnd Module

Rectangle类的实现

Imports SystemPublic Class Rectangle    Private length As Double    Private width As Double    'Public methods    Public Sub AcceptDetails()        length = 4.5        width = 3.5    End Sub    Public Function GetArea() As Double        GetArea = length * width    End Function    Public Sub Display()        Console.WriteLine("Length: {0}", length)        Console.WriteLine("Width: {0}", width)        Console.WriteLine("Area: {0}", GetArea())    End Sub    Shared Sub Main()        Dim r As New Rectangle()        r.Acceptdetails()        r.Display()        Console.ReadLine()    End SubEnd Class

接受来自用户的值

Module variablesNdataypes   Sub Main()      Dim message As String      Console.Write("Enter message: ")      message = Console.ReadLine      Console.WriteLine()      Console.WriteLine("Your Message: {0}", message)      Console.ReadLine()   End SubEnd Module

声明常量

Module constantsNenum   Sub Main()      Const PI = 3.14149      Dim radius, area As Single      radius = 7      area = PI * radius * radius      Console.WriteLine("Area = " & Str(area))      Console.ReadKey()   End SubEnd Module

声明枚举

Module constantsNenum   Enum Colors      red = 1      orange = 2      yellow = 3      green = 4      azure = 5      blue = 6      violet = 7   End Enum   Sub Main()      Console.WriteLine("The Color Red is : " & Colors.red)      Console.WriteLine("The Color Yellow is : " & Colors.yellow)      Console.WriteLine("The Color Blue is : " & Colors.blue)      Console.WriteLine("The Color Green is : " & Colors.green)      Console.ReadKey()   End SubEnd Module