本文整理汇总了VB.NET中System.Text.UTF32Encoding.UTF32Encoding构造函数的典型用法代码示例。如果您正苦于以下问题：VB.NET UTF32Encoding构造函数的具体用法？VB.NET UTF32Encoding怎么用？VB.NET UTF32Encoding使用的例子？那么, 这里精选的构造函数代码示例或许可以为您提供帮助。您也可以进一步了解该构造函数所在类System.Text.UTF32Encoding的用法示例。
在下文中一共展示了UTF32Encoding构造函数的2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: Main
' 导入命名空间
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输出：
FF FE 00 00 FF FE 00 00 00 00 FE FF
示例2: Example
' 导入命名空间
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输出：
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�