本文整理汇总了VB.NET中System.Text.ASCIIEncoding类的典型用法代码示例。如果您正苦于以下问题：VB.NET ASCIIEncoding类的具体用法？VB.NET ASCIIEncoding怎么用？VB.NET ASCIIEncoding使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了ASCIIEncoding类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: ASCIIEncodingExample
' 导入命名空间
Imports System.Text
Class ASCIIEncodingExample
Public Shared Sub Main()
' The encoding.
Dim ascii As New ASCIIEncoding()
' A Unicode string with two characters outside the ASCII code range.
Dim unicodeString As String = _
"This Unicode string contains two characters " & _
"with codes outside the ASCII code range, " & _
"Pi (" & ChrW(928) & ") and Sigma (" & ChrW(931) & ")."
Console.WriteLine("Original string:")
Console.WriteLine(unicodeString)
' Save positions of the special characters for later reference.
Dim indexOfPi As Integer = unicodeString.IndexOf(ChrW(928))
Dim indexOfSigma As Integer = unicodeString.IndexOf(ChrW(931))
' Encode string.
Dim encodedBytes As Byte() = ascii.GetBytes(unicodeString)
Console.WriteLine()
Console.WriteLine("Encoded bytes:")
Dim b As Byte
For Each b In encodedBytes
Console.Write("[{0}]", b)
Next b
Console.WriteLine()
' Notice that the special characters have been replaced with
' the value 63, which is the ASCII character code for '?'.
Console.WriteLine()
Console.WriteLine( _
"Value at position of Pi character: {0}", _
encodedBytes(indexOfPi) _
)
Console.WriteLine( _
"Value at position of Sigma character: {0}", _
encodedBytes(indexOfSigma) _
)
' Decode bytes back to string.
' Notice missing Pi and Sigma characters.
Dim decodedString As String = ascii.GetString(encodedBytes)
Console.WriteLine()
Console.WriteLine("Decoded bytes:")
Console.WriteLine(decodedString)
End Sub
End Class输出：
Original string: This Unicode string contains two characters with codes outside the ASCII code ra nge, Pi (Π) and Sigma (Σ). Encoded bytes: [84][104][105][115][32][85][110][105][99][111][100][101][32][115][116][114][105] [110][103][32][99][111][110][116][97][105][110][115][32][116][119][111][32][99][ 104][97][114][97][99][116][101][114][115][32][119][105][116][104][32][99][111][1 00][101][115][32][111][117][116][115][105][100][101][32][116][104][101][32][65][ 83][67][73][73][32][99][111][100][101][32][114][97][110][103][101][44][32][80][1 05][32][40][63][41][32][97][110][100][32][83][105][103][109][97][32][40][63][41] [46] Value at position of Pi character: 63 Value at position of Sigma character: 63 Decoded bytes: This Unicode string contains two characters with codes outside the ASCII code ra nge, Pi (?) and Sigma (?).