VB.Net by API/System/Convert — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Текущая версия на 12:51, 26 мая 2010
Содержание
Convert.FromBase64String
Public Class Tester
Public Shared Sub Main
Dim quote As String = "AAAAA"
Dim quoteBytes As Byte() = System.Text.Encoding.UTF8.GetBytes(quote)
Dim quote64 As String = Convert.ToBase64String(quoteBytes)
Dim byteSet As Byte() = Convert.FromBase64String(quote64)
Dim result As String = System.Text.Encoding.UTF8.GetString(byteSet)
Console.WriteLine(quote & vbNewLine & quote64 & vbNewLine & result)
End Sub
End Class
Convert.ToBase64String
Public Class Tester
Public Shared Sub Main
Dim quote As String = "AAAAA"
Dim quoteBytes As Byte() = System.Text.Encoding.UTF8.GetBytes(quote)
Dim quote64 As String = Convert.ToBase64String(quoteBytes)
Dim byteSet As Byte() = Convert.FromBase64String(quote64)
Dim result As String = System.Text.Encoding.UTF8.GetString(byteSet)
Console.WriteLine(quote & vbNewLine & quote64 & vbNewLine & result)
End Sub
End Class
Convert.ToInt32
Imports System
Imports System.Text
Imports System.Text.RegularExpressions
Public Class MainClass
Shared Sub Main( )
Dim blnTrue As Boolean = True
Dim blnOne As Boolean = 1
Dim blnNegOne As Boolean = -1
Dim blnFalse As Boolean = False
If Convert.ToInt16(blnNegOne) = 1 Then
Console.WriteLine(blnFalse)
Console.WriteLine(Convert.ToString(Convert.ToInt32(blnFalse)))
End If
End Sub "Main
End Class
Convert.ToInt64
Imports System
Public Class MainClass
Shared Sub Main( )
Dim l As Long
Dim s As Single
l = Long.MaxValue
Console.WriteLine(l)
s = Convert.ToSingle(l)
s -= 1000000000000
l = Convert.ToInt64(s)
Console.WriteLine(l)
End Sub "Main
End Class
Convert.ToSingle
Imports System
Public Class MainClass
Shared Sub Main( )
Dim l As Long
Dim s As Single
l = Long.MaxValue
Console.WriteLine(l)
s = Convert.ToSingle(l)
s -= 1000000000000
l = Convert.ToInt64(s)
Console.WriteLine(l)
End Sub "Main
End Class
Convert.ToUInt16
Imports System
Imports System.Text
Imports System.Text.RegularExpressions
Public Class MainClass
Shared Sub Main( )
Dim shrShort As Short
Dim shrUInt16 As UInt16
Dim shrInt16 As Int16
Dim intInteger As Integer
Dim intUInt32 As UInt32
Dim intInt32 As Int32
Dim lngLong As Long
Dim lngInt64 As Int64
shrShort = 0
shrUInt16 = Convert.ToUInt16(shrShort)
shrInt16 = shrShort
intInteger = shrShort
intUInt32 = Convert.ToUInt32(shrShort)
intInt32 = shrShort
lngInt64 = shrShort
lngLong = lngLong.MaxValue
If lngLong > Short.MaxValue Then
shrShort = Convert.ToInt16(lngLong)
End If
intInteger = CInt(lngLong)
End Sub "Main
End Class