Encoding.GetBytes Method (String)
Assembly: mscorlib (in mscorlib.dll)
| Exception type | Condition |
|---|---|
| s is a null reference (Nothing in Visual Basic). | |
| A fallback occurred (see Understanding Encodings for complete explanation) -and- EncoderFallback is set to EncoderExceptionFallback. |
If the data to be converted is available only in sequential blocks (such as data read from a stream) or if the amount of data is so large that it needs to be divided into smaller blocks, the application should use the Decoder or the Encoder provided by the GetDecoder method or the GetEncoder method, respectively, of a derived class.
For a discussion of programming considerations for use of this method, see the Encoding class description.
The following code example determines the number of bytes required to encode a string or a range in the string, encodes the characters, and displays the resulting bytes.
using namespace System; using namespace System::Text; void PrintCountsAndBytes( String^ s, Encoding^ enc ); void PrintCountsAndBytes( String^ s, int index, int count, Encoding^ enc ); void PrintHexBytes( array<Byte>^bytes ); int main() { // 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) // a high-surrogate value (U+D8FF) // a low-surrogate value (U+DCFF) String^ myStr = L"za\u0306\u01FD\u03B2\xD8FF\xDCFF"; // Get different encodings. Encoding^ u7 = Encoding::UTF7; Encoding^ u8 = Encoding::UTF8; Encoding^ u16LE = Encoding::Unicode; Encoding^ u16BE = Encoding::BigEndianUnicode; Encoding^ u32 = Encoding::UTF32; // Encode the entire string, and print out the counts and the resulting bytes. Console::WriteLine( "Encoding the entire string:" ); PrintCountsAndBytes( myStr, u7 ); PrintCountsAndBytes( myStr, u8 ); PrintCountsAndBytes( myStr, u16LE ); PrintCountsAndBytes( myStr, u16BE ); PrintCountsAndBytes( myStr, u32 ); Console::WriteLine(); // Encode three characters starting at index 4, and print out the counts and the resulting bytes. Console::WriteLine( "Encoding the characters from index 4 through 6:" ); PrintCountsAndBytes( myStr, 4, 3, u7 ); PrintCountsAndBytes( myStr, 4, 3, u8 ); PrintCountsAndBytes( myStr, 4, 3, u16LE ); PrintCountsAndBytes( myStr, 4, 3, u16BE ); PrintCountsAndBytes( myStr, 4, 3, u32 ); } void PrintCountsAndBytes( String^ s, Encoding^ enc ) { // Display the name of the encoding used. Console::Write( "{0,-30} :", enc ); // Display the exact byte count. int iBC = enc->GetByteCount( s ); Console::Write( " {0,-3}", iBC ); // Display the maximum byte count. int iMBC = enc->GetMaxByteCount( s->Length ); Console::Write( " {0,-3} :", iMBC ); // Encode the entire string. array<Byte>^bytes = enc->GetBytes( s ); // Display all the encoded bytes. PrintHexBytes( bytes ); } void PrintCountsAndBytes( String^ s, int index, int count, Encoding^ enc ) { // Display the name of the encoding used. Console::Write( "{0,-30} :", enc ); // Display the exact byte count. int iBC = enc->GetByteCount( s->ToCharArray(), index, count ); Console::Write( " {0,-3}", iBC ); // Display the maximum byte count. int iMBC = enc->GetMaxByteCount( count ); Console::Write( " {0,-3} :", iMBC ); // Encode a range of characters in the string. array<Byte>^bytes = gcnew array<Byte>(iBC); enc->GetBytes( s, index, count, bytes, bytes->GetLowerBound( 0 ) ); // Display all the encoded bytes. PrintHexBytes( bytes ); } void PrintHexBytes( array<Byte>^bytes ) { if ( (bytes == nullptr) || (bytes->Length == 0) ) Console::WriteLine( "<none>" ); else { for ( int i = 0; i < bytes->Length; i++ ) Console::Write( "{0:X2} ", bytes[ i ] ); Console::WriteLine(); } } /* This code produces the following output. Encoding the entire string: System.Text.UTF7Encoding : 18 23 :7A 61 2B 41 77 59 42 2F 51 4F 79 32 50 2F 63 2F 77 2D System.Text.UTF8Encoding : 12 24 :7A 61 CC 86 C7 BD CE B2 F1 8F B3 BF System.Text.UnicodeEncoding : 14 16 :7A 00 61 00 06 03 FD 01 B2 03 FF D8 FF DC System.Text.UnicodeEncoding : 14 16 :00 7A 00 61 03 06 01 FD 03 B2 D8 FF DC FF System.Text.UTF32Encoding : 24 32 :7A 00 00 00 61 00 00 00 06 03 00 00 FD 01 00 00 B2 03 00 00 FF FC 04 00 Encoding the characters from index 4 through 6: System.Text.UTF7Encoding : 10 11 :2B 41 37 4C 59 2F 39 7A 2F 2D System.Text.UTF8Encoding : 6 12 :CE B2 F1 8F B3 BF System.Text.UnicodeEncoding : 6 8 :B2 03 FF D8 FF DC System.Text.UnicodeEncoding : 6 8 :03 B2 D8 FF DC FF System.Text.UTF32Encoding : 8 16 :B2 03 00 00 FF FC 04 00 */
import System.*;
import System.Text.*;
public class SamplesEncoding
{
public static void main(String[] args)
{
// 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)
// a high-surrogate value (U+D8FF)
// a low-surrogate value (U+DCFF)
String myStr = "za\u0306\u01FD\u03B2\uD8FF\uDCFF";
// Get different encodings.
Encoding u7 = Encoding.get_UTF7();
Encoding u8 = Encoding.get_UTF8();
Encoding u16LE = Encoding.get_Unicode();
Encoding u16BE = Encoding.get_BigEndianUnicode();
Encoding u32 = Encoding.get_UTF32();
// Encode the entire string, and print out the counts
// and the resulting bytes.
Console.WriteLine("Encoding the entire string:");
PrintCountsAndBytes(myStr, u7);
PrintCountsAndBytes(myStr, u8);
PrintCountsAndBytes(myStr, u16LE);
PrintCountsAndBytes(myStr, u16BE);
PrintCountsAndBytes(myStr, u32);
Console.WriteLine();
// Encode three characters starting at index 4,
// and print out the counts and the resulting bytes.
Console.WriteLine("Encoding the characters from index 4 through 6:");
PrintCountsAndBytes(myStr, 4, 3, u7);
PrintCountsAndBytes(myStr, 4, 3, u8);
PrintCountsAndBytes(myStr, 4, 3, u16LE);
PrintCountsAndBytes(myStr, 4, 3, u16BE);
PrintCountsAndBytes(myStr, 4, 3, u32);
} //main
public static void PrintCountsAndBytes(String s, Encoding enc)
{
// Display the name of the encoding used.
Console.Write("{0,-30} :", enc.ToString());
// Display the exact byte count.
int iBC = enc.GetByteCount(s);
Console.Write(" {0,-3}", String.valueOf(iBC));
// Display the maximum byte count.
int iMBC = enc.GetMaxByteCount(s.get_Length());
Console.Write(" {0,-3} :", String.valueOf(iMBC));
// Encode the entire string.
ubyte bytes[] = enc.GetBytes(s);
// Display all the encoded bytes.
PrintHexBytes(bytes);
} //PrintCountsAndBytes
public static void PrintCountsAndBytes(String s, int index,
int count, Encoding enc)
{
// Display the name of the encoding used.
Console.Write("{0,-30} :", enc.ToString());
// Display the exact byte count.
int iBC = enc.GetByteCount(s.ToCharArray(), index, count);
Console.Write(" {0,-3}", String.valueOf(iBC));
// Display the maximum byte count.
int iMBC = enc.GetMaxByteCount(count);
Console.Write(" {0,-3} :", String.valueOf(iMBC));
// Encode a range of characters in the string.
ubyte bytes[] = new ubyte[iBC];
enc.GetBytes(s, index, count, bytes, bytes.GetLowerBound(0));
// Display all the encoded bytes.
PrintHexBytes(bytes);
} //PrintCountsAndBytes
public static void PrintHexBytes(ubyte[] bytes)
{
if(bytes == null || bytes.length == 0) {
Console.WriteLine("<none>");
}
else {
for(int i = 0; i < bytes.length; i++) {
Console.Write("{0:X2} ",
((System.Byte)bytes[i]).ToString("X2"));
}
Console.WriteLine();
}
} //PrintHexBytes
} //SamplesEncoding
/*
This code produces the following output.
Encoding the entire string:
System.Text.UTF7Encoding : 18 23 :7A 61 2B 41 77 59 42 2F 51 4F 79 32 50
2F 63 2F 77 2D
System.Text.UTF8Encoding : 12 24 :7A 61 CC 86 C7 BD CE B2 F1 8F B3 BF
System.Text.UnicodeEncoding : 14 16 :7A 00 61 00 06 03 FD 01 B2 03 FF D8 FF
DC
System.Text.UnicodeEncoding : 14 16 :00 7A 00 61 03 06 01 FD 03 B2 D8 FF DC
FF
System.Text.UTF32Encoding : 24 32 :7A 00 00 00 61 00 00 00 06 03 00 00 FD
01 00 00 B2 03 00 00 FF FC 04 00
Encoding the characters from index 4 through 6:
System.Text.UTF7Encoding : 10 11 :2B 41 37 4C 59 2F 39 7A 2F 2D
System.Text.UTF8Encoding : 6 12 :CE B2 F1 8F B3 BF
System.Text.UnicodeEncoding : 6 8 :B2 03 FF D8 FF DC
System.Text.UnicodeEncoding : 6 8 :03 B2 D8 FF DC FF
System.Text.UTF32Encoding : 8 16 :B2 03 00 00 FF FC 04 00
*/
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.