本文整理匯總了VB.NET中System.Text.UTF32Encoding.UTF32Encoding構造函數的典型用法代碼示例。如果您正苦於以下問題：VB.NET UTF32Encoding構造函數的具體用法？VB.NET UTF32Encoding怎麽用？VB.NET UTF32Encoding使用的例子？那麽, 這裏精選的構造函數代碼示例或許可以為您提供幫助。您也可以進一步了解該構造函數所在類System.Text.UTF32Encoding的用法示例。
在下文中一共展示了UTF32Encoding構造函數的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的VB.NET代碼示例。
示例1: Main
' 導入命名空間
Imports System.Text
Public Class SamplesUTF32Encoding
Public Shared Sub Main()
' Create instances of UTF32Encoding, with the byte order mark and without.
Dim u32LeNone As New UTF32Encoding()
Dim u32BeNone As New UTF32Encoding(True, False)
Dim u32LeBom As New UTF32Encoding(False, True)
Dim u32BeBom As New UTF32Encoding(True, True)
' Display the preamble for each instance.
PrintHexBytes(u32LeNone.GetPreamble())
PrintHexBytes(u32BeNone.GetPreamble())
PrintHexBytes(u32LeBom.GetPreamble())
PrintHexBytes(u32BeBom.GetPreamble())
End Sub
Public Shared Sub PrintHexBytes(bytes() As Byte)
If bytes Is Nothing OrElse bytes.Length = 0 Then
Console.WriteLine("<none>")
Else
Dim i As Integer
For i = 0 To bytes.Length - 1
Console.Write("{0:X2} ", bytes(i))
Next i
Console.WriteLine()
End If
End Sub
End Class輸出：
FF FE 00 00 FF FE 00 00 00 00 FE FF
示例2: Example
' 導入命名空間
Imports System.Text
Public Module Example
Public Sub Main()
' Create a UTF32Encoding object with error detection enabled.
Dim encExc As New UTF32Encoding(Not BitConverter.IsLittleEndian, True, True)
' Create a UTF32Encoding object with error detection disabled.
Dim encRepl As New UTF32Encoding(Not BitConverter.IsLittleEndian, True, False)
' Create a byte arrays from a string, and add an invalid surrogate pair, as follows.
' Latin Small Letter Z (U+007A)
' Latin Small Letter A (U+0061)
' Combining Breve (U+0306)
' Latin Small Letter AE With Acute (U+01FD)
' Greek Small Letter Beta (U+03B2)
' a high-surrogate value (U+D8FF)
' an invalid low surrogate (U+01FF)
Dim s As String = "za" & ChrW(&H0306) & ChrW(&H01FD) & ChrW(&H03B2)
' Encode the string using little-endian byte order.
Dim index As Integer = encExc.GetBytecount(s)
Dim bytes(index + 3) As Byte
encExc.GetBytes(s, 0, s.Length, bytes, 0)
bytes(index) = &hFF
bytes(index + 1) = &hD8
bytes(index + 2) = &hFF
bytes(index + 3) = &h01
' Decode the byte array with error detection.
Console.WriteLine("Decoding with error detection:")
PrintDecodedString(bytes, encExc)
' Decode the byte array without error detection.
Console.WriteLine("Decoding without error detection:")
PrintDecodedString(bytes, encRepl)
End Sub
' Decode the bytes and display the string.
Public Sub PrintDecodedString(bytes() As Byte, enc As Encoding)
Try
Console.WriteLine(" Decoded string: {0}", enc.GetString(bytes, 0, bytes.Length))
Catch e As DecoderFallbackException
Console.WriteLine(e.ToString())
End Try
Console.WriteLine()
End Sub
End Module輸出：
Decoding with error detection: System.Text.DecoderFallbackException: Unable to translate bytes [FF][D8][FF][01] at index 20 from specified code page to Unicode. at System.Text.DecoderExceptionFallbackBuffer.Throw(Byte[] bytesUnknown, Int32 index) at System.Text.DecoderExceptionFallbackBuffer.Fallback(Byte[] bytesUnknown, Int32 index ) at System.Text.DecoderFallbackBuffer.InternalFallback(Byte[] bytes, Byte* pBytes) at System.Text.UTF32Encoding.GetCharCount(Byte* bytes, Int32 count, DecoderNLS baseDeco der) at System.Text.UTF32Encoding.GetString(Byte[] bytes, Int32 index, Int32 count) at Example.PrintDecodedString(Byte[] bytes, Encoding enc) Decoding without error detection: Decoded string: zăǽβ�