VB.Net/Language Basics/Enum
Версия от 16:40, 26 мая 2010; (обсуждение)
Содержание
Convert Element in Enum to Integer
Imports System
public class MainClass
Enum Temperatures
CelsiusMeetsFahrenheit = -40
WickedCold = 0
FreezingPoint = 32
LightJacketWeather = 60
SwimmingWeather = 72
BoilingPoint = 212
End Enum
Shared Sub Main()
Console.WriteLine("Freezing point of water: {0}",CType(Temperatures.FreezingPoint, Integer))
Console.WriteLine("Boiling point of water: {0}",CType(Temperatures.BoilingPoint, Integer))
End Sub
End Class
Convert Enum element to int and call ToString
Imports System
Imports System.Data
Imports System.Collections
public class MainClass
Shared Sub Main()
Dim I1, I2, I3 As Integer
I1 = E.A : I2 = E.B : I3 = E.C
Console.WriteLine(I1.ToString() &" " & I2.ToString() &" " & I3.ToString())
End Sub
End Class
Enum E
A = 5
B
C = 6 " B and C will both be 6
End Enum
Convert Enum to Int
Imports System
Public Class MainClass
Enum Temperatures
WickedCold = 0
FreezingPoint = 32
LightJacketWeather = 60
SwimmingWeather = 72
BoilingPoint = 212
End Enum "Temperatures
Shared Sub Main(ByVal args As String())
Console.WriteLine("Freezing point of water: {0}",CInt(Temperatures.FreezingPoint))
Console.WriteLine("Boiling point of water: {0}", CInt(Temperatures.BoilingPoint))
End Sub
End Class
Enum data Demo
Imports System
Public Class MainClass
Private Enum Names As Integer
Norman = 1
Mike = 2
Reece = 3
End Enum
Shared Sub Main()
System.Console.WriteLine(Names.Norman.ToString & " = " & Names.Norman)
System.Console.WriteLine(Names.Mike.ToString & " = " & Names.Mike)
System.Console.WriteLine(Names.Reece.ToString & " = " & Names.Reece)
End Sub
End Class
Enum Temperatures
Imports System
Public Class MainClass
Enum Temperatures
WickedCold = 0
FreezingPoint = 32
LightJacketWeather = 60
SwimmingWeather = 72
BoilingPoint = 212
End Enum "Temperatures
Shared Sub Main(ByVal args As String())
Console.WriteLine("Freezing point of water: {0}",Temperatures.FreezingPoint)
Console.WriteLine("Boiling point of water: {0}", Temperatures.BoilingPoint)
End Sub
End Class
Use Enum to define Access Level
Imports System
Imports System.Diagnostics
Public Class MainClass
Public Enum AccessLevel
Clerk
Supervisor
Administrator
User = Clerk
Manager = Supervisor
SysAdmin = Administrator
Superuser = Administrator
End Enum
Shared Sub Main()
Dim access_level As AccessLevel = AccessLevel.SysAdmin
Dim txt As String = access_level.ToString() & vbCrLf
txt &= AccessLevel.Clerk.ToString() & vbCrLf
txt &= AccessLevel.Supervisor.ToString() & vbCrLf
txt &= AccessLevel.Administrator.ToString() & vbCrLf
Console.WriteLine(txt)
End Sub
End Class