Mega Code Archive
The IFormattable Interface
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Imports System.Globalization
Public Class Temperature : Implements IFormattable
Private m_Temp As Decimal
Public Sub New(temperature As Decimal)
Me.m_Temp = temperature
End Sub
Public ReadOnly Property Celsius() As Decimal
Get
Return Me.m_Temp
End Get
End Property
Public ReadOnly Property Kelvin() As Decimal
Get
Return Me.m_Temp + 273.15d
End Get
End Property
Public ReadOnly Property Fahrenheit() As Decimal
Get
Return Math.Round(CDec(Me.m_Temp * 9 / 5 + 32), 2)
End Get
End Property
Public Overrides Function ToString() As String
Return Me.ToString("G", Nothing)
End Function
Public Overloads Function ToString(format As String) As String
Return Me.ToString(format, Nothing)
End Function
Public Overloads Function ToString(format As String, provider As IFormatProvider) As String _
Implements IFormattable.ToString
If String.IsNullOrEmpty(format) Then format = "G"
format = format.Trim().ToUpperInvariant()
If provider Is Nothing Then provider = NumberFormatInfo.CurrentInfo
Select Case format
Case "F"
Return Me.Fahrenheit.ToString("N2", provider) & "¡Ã£F"
Case "K"
Return Me.Kelvin.ToString("N2", provider) & "¡Ã£K"
Case "C", "G"
Return Me.Celsius.ToString("N2", provider) & "¡Ã£C"
Case Else
Throw New FormatException(String.Format("The '{0}' format string is not supported.", format))
End Select
End Function
End Class
Public Module Example
Public Sub Main()
Dim temp1 As New Temperature(22d)
Console.WriteLine(Convert.ToString(temp1, New CultureInfo("ja-JP")))
Console.WriteLine("Temperature: {0:K}", temp1)
Console.WriteLine("Temperature: {0:F}", temp1)
Console.WriteLine(String.Format(New CultureInfo("fr-FR"), "Temperature: {0:F}", temp1))
End Sub
End Module
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