How to convert byte[] to Hexadecimal format?

How to convert byte[] to Hexadecimal format?

• jftl6y_007

  Hi,

  I just stumled on a code sample in MSDN:

  
  using System;

  class BlockCopyDemo
  {
      // Display the array contents in hexadecimal.
      public static void DisplayArray( Array arr, string name )
      {
          // Get the array element width; format the formatting string.
          int elemWidth = Buffer.ByteLength( arr ) / arr.Length;
          string format = String.Format( " {{0:X{0}}}", 2 * elemWidth );

          // Display the array elements from right to left.
          Console.Write( "{0,5}:", name );
          for( int loopX = arr.Length - 1; loopX >= 0; loopX-- )
              Console.Write( format, arr.GetValue( loopX ) );
          Console.WriteLine( );
      }

      public static void Main( )
      {
          // These are source and destination arrays for BlockCopy.
          short[ ] src  = { 258, 259, 260, 261, 262, 263, 264,
                            265, 266, 267, 268, 269, 270 };
          long[ ]  dest = { 17, 18, 19, 20 };

          Console.WriteLine( "This example of the \n" +
              "Buffer.BlockCopy( Array, int, Array, int, " +
              "int ) \nmethod generates the following output.\n" +
              "Note: The arrays are displayed from right to left.\n" );
          Console.WriteLine( "  Initial values of arrays:\r\n" );

          // Display the values of the arrays.
          DisplayArray( src, "src" );
          DisplayArray( dest, "dest" );

          // Copy two regions of source array to destination array,
          // and two overlapped copies from source to source.
          Console.WriteLine( "\n  Call these methods: \n\n" +
              " Buffer.BlockCopy( src, 5, dest, 7, 6 ),\n" +
              " Buffer.BlockCopy( src, 16, dest, 22, 5 ),\n" +
              "  (these overlap source and destination)\n" +
              " Buffer.BlockCopy( src, 4, src, 5, 7 ),\n" +
              " Buffer.BlockCopy( src, 16, src, 15, 7 ).\n" );
          Console.WriteLine( "  Final values of arrays:\n" );

          Buffer.BlockCopy( src, 5, dest, 7, 6 );
          Buffer.BlockCopy( src, 16, dest, 22, 5 );
          Buffer.BlockCopy( src, 4, src, 5, 7 );
          Buffer.BlockCopy( src, 16, src, 15, 7 );

          // Display the arrays again.
          DisplayArray( src, "src" );
          DisplayArray( dest, "dest" );
      }
  }

  /*
  This example of the
  Buffer.BlockCopy( Array, int, Array, int, int )
  method generates the following output.
  Note: The arrays are displayed from right to left.

    Initial values of arrays:

    src: 010E 010D 010C 010B 010A 0109 0108 0107 0106 0105 0104 0103 0102
   dest: 0000000000000014 0000000000000013 0000000000000012 0000000000000011

    Call these methods:

   Buffer.BlockCopy( src, 5, dest, 7, 6 ),
   Buffer.BlockCopy( src, 16, dest, 22, 5 ),
    (these overlap source and destination)
   Buffer.BlockCopy( src, 4, src, 5, 7 ),
   Buffer.BlockCopy( src, 16, src, 15, 7 ).

    Final values of arrays:

    src: 010E 010D 0D01 0C01 0B01 0A09 0108 0701 0601 0501 0404 0103 0102
   dest: 00000000000C010B 010A000000000013 0000000701060105 0100000000000011
  */

   
  Hope this helps.

  cheers,

  Paul June A. Domag

  
  
  

• Tom PIC

  I don't think there's a SQL type for hex, I guess you'd store it as a varchar
  
  
  

• mattdk

  Do the bytes contain chars that are hex, or do you want to turn thier integer values to hex string.Format will allow you to do the latter.
  
  
  

• ElliottNess

  Thanks cgraus and Paul. Yes, it contains characters and Isolve it before I viewed these replies. Thanks again. Do anyone of you knows what is name of hexadecimal datatype in mySQl database or it is possible to store hexadecimal value
  
  den2005
  

• Marc Kuperstein

  How about doing the reverse from hexadecimal data to byte[] data
  
  
  den2005
  

  
  

• joe joseph

  Thanks cgraus. I think you are right. But I posted same question on mySQL Forum site.
  
  den2005
  
• How to convert byte[] to Hexadecimal format?