UnicodeEncoding.GetDecoder Method

Return Value

Type: System.Text.Decoder
A Decoder that converts a UTF-16 encoded sequence of bytes into a sequence of Unicode characters.

Imports System.Text

Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      ' Get an encoder and a decoder from UnicodeEncoding.
      Dim u16 As New UnicodeEncoding(False, True, True)
      Dim myEnc As Encoder = u16.GetEncoder()
      Dim myDec As Decoder = u16.GetDecoder()

      ' The characters to encode:
      '    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)
      Dim myChars() As Char = {"z"c, "a"c, ChrW(&H306), ChrW(&H1FD), ChrW(&H3B2)}
      outputBlock.Text &= "The original characters : "
      outputBlock.Text &= myChars & vbCrLf

      ' Encode the character array.
      Dim iBC As Integer = myEnc.GetByteCount(myChars, 0, myChars.Length, True)
      ' NOTE: In Visual Basic, arrays contain one extra element by default.
      '       The following line creates an array with the exact number of elements required.
      Dim myBytes(iBC - 1) As Byte
      myEnc.GetBytes(myChars, 0, myChars.Length, myBytes, 0, True)

      ' Print the resulting bytes.
      outputBlock.Text &= "Using the encoder       : "
      Dim i As Integer
      For i = 0 To myBytes.Length - 1
         outputBlock.Text += String.Format("{0:X2} ", myBytes(i))
      Next i
      outputBlock.Text &= vbCrLf

      ' Decode the byte array back into an array of characters.
      Dim iCC As Integer = myDec.GetCharCount(myBytes, 0, myBytes.Length, True)
      ' NOTE: In Visual Basic, arrays contain one extra element by default.
      '       The following line creates an array with the exact number of elements required.
      Dim myDecodedChars(iCC - 1) As Char
      myDec.GetChars(myBytes, 0, myBytes.Length, myDecodedChars, 0, True)

      ' Print the resulting characters.
      outputBlock.Text &= "Using the decoder       : "
      outputBlock.Text &= myDecodedChars & vbCrLf

   End Sub 'Main 

End Class 'SamplesUnicodeEncoding


' This example displays the following output: 
'
'   The original characters : zăǽβ
'   Using the encoder       : 7A 00 61 00 06 03 FD 01 B2 03 
'   Using the decoder       : zăǽβ
'

using System;
using System.Text;

public class Example
{

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      // Get an encoder and a decoder from UnicodeEncoding.
      UnicodeEncoding u16 = new UnicodeEncoding(false, true, true);
      Encoder myEnc = u16.GetEncoder();
      Decoder myDec = u16.GetDecoder();

      // The characters to encode:
      //    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)
      char[] myChars = new char[5] { 'z', 'a', '\u0306', '\u01FD', '\u03B2' };
      outputBlock.Text += "The original characters : ";
      outputBlock.Text += myChars + "\n";

      // Encode the character array.
      int iBC = myEnc.GetByteCount(myChars, 0, myChars.Length, true);
      byte[] myBytes = new byte[iBC];
      myEnc.GetBytes(myChars, 0, myChars.Length, myBytes, 0, true);

      // Print the resulting bytes.
      outputBlock.Text += "Using the encoder       : ";
      for (int i = 0; i < myBytes.Length; i++)
         outputBlock.Text += String.Format("{0:X2} ", myBytes[i]);
      outputBlock.Text += "\n";

      // Decode the byte array back into an array of characters.
      int iCC = myDec.GetCharCount(myBytes, 0, myBytes.Length, true);
      char[] myDecodedChars = new char[iCC];
      myDec.GetChars(myBytes, 0, myBytes.Length, myDecodedChars, 0, true);

      // Print the resulting characters.
      outputBlock.Text += "Using the decoder       : ";
      outputBlock.Text += myDecodedChars + "\n";

   }

}


/* 
This example displays the following output:
      The original characters : zăǽβ
      Using the encoder       : 7A 00 61 00 06 03 FD 01 B2 03 
      Using the decoder       : zăǽβ
*/