VB.Net - 声明

Dim Statement

Dim语句

Declares and allocates storage space for one or more variables.

声明和分配一个或多个变量的存储空间。

Dim number As Integer
Dim quantity As Integer = 100
Dim message As String = "Hello!"

Const maximum As Long = 1000
Const naturalLogBase As Object 
= CDec(2.7182818284)

Enum CoffeeMugSize
    Jumbo
    ExtraLarge
    Large
    Medium
    Small
End Enum 

Class Statement

类语句

Declares the name of a class and introduces the definition of the variables, properties, events, and procedures that the class comprises.

声明类的名称，并引入该类包含的变量，属性，事件和过程的定义。

Class Box
Public length As Double
Public breadth As Double   
Public height As Double
End Class

Structure Statement

结构声明

Declares the name of a structure and introduces the definition of the variables, properties, events, and procedures that the structure comprises.

声明结构的名称，并引入结构所包含的变量，属性，事件和过程的定义。

Structure Box
Public length As Double           
Public breadth As Double   
Public height As Double
End Structure

Module Statement

模块语句

Declares the name of a module and introduces the definition of the variables, properties, events, and procedures that the module comprises.

声明模块的名称，并介绍模块包含的变量，属性，事件和过程的定义。

Public Module myModule
Sub Main()
Dim user As String = 
InputBox("What is your name?") 
MsgBox("User name is" & user)
End Sub 
End Module

Interface Statement

Public Interface MyInterface
    Sub doSomething()
End Interface 

Function Statement

函数语句

Declares the name, parameters, and code that define a Function procedure.

声明定义函数过程的名称，参数和代码。

Function myFunction
(ByVal n As Integer) As Double 
    Return 5.87 * n
End Function

Sub Statement

子语句

Declares the name, parameters, and code that define a Sub procedure.

声明定义Sub过程的名称，参数和代码。

Sub mySub(ByVal s As String)
    Return
End Sub 

Declare Statement

声明语句

Declares a reference to a procedure implemented in an external file.

声明对在外部文件中实现的过程的引用。

Declare Function getUserName
Lib "advapi32.dll" 
Alias "GetUserNameA" 
(
  ByVal lpBuffer As String, 
  ByRef nSize As Integer) As Integer 

Operator Statement

运算符声明

Declares the operator symbol, operands, and code that define an operator procedure on a class or structure.

声明的运算符符号、 操作数和在类或结构定义一个运算符过程的代码。

Public Shared Operator +
(ByVal x As obj, ByVal y As obj) As obj
        Dim r As New obj
' implemention code for r = x + y
        Return r
    End Operator 

Property Statement

属性声明

Declares the name of a property, and the property procedures used to store and retrieve the value of the property.

声明属性的名称，以及用于存储和检索属性值的属性过程。

ReadOnly Property quote() As String 
    Get 
        Return quoteString
    End Get 
End Property

Event Statement

事件声明

Declares a user-defined event.

声明用户定义的事件。

Public Event Finished()

Delegate Statement

委托声明

Used to declare a delegate.

用于声明一个委托。

Delegate Function MathOperator( 
    ByVal x As Double, 
    ByVal y As Double 
) As Double