CODEWITHSUNDEEP
c#arraysbyte
jM2.me
jM2.me

Reputation: 3969

C# Bytes String to Bytes Array

I have following string of bytes

17 80 41 00 01 00 01 00 08 00 44 61 72 65 46 61 74 65 01 00 00 00 01 00 03 00 01 00 09 00 43 68 61 6E 6E 65 6C 2D 31 00 00 02 00 09 00 43 68 61 6E 6E 65 6C 2D 32 65 00 03 00 09 00 43 68 61 6E 6E 65 6C 2D 33 65 00

What is the best way to take it as input from user and make it into byte array?

Upvotes: 10

Views: 6597

Answers (3)

Michael Goldshteyn
Michael Goldshteyn

Reputation: 74370

You can use the Parse method in System.Byte to parse the individual hax pairs:

// Get the string from the user
string s=Console.ReadLine();

// Convert to a byte array
byte[] sBytes=s.Split(new char[] {' '})
               .Select(hexChar => byte.Parse(hexChar,NumberStyles.HexNumber))
               .ToArray();

// *** Test code follows ***

// Display the bytes (optional), to verify that the conversion worked
StringBuilder hexString=new StringBuilder(sBytes.Length*3);

foreach (byte b in sBytes)     
{
  // Separate hex pairs with a space
  if (hexString.Length>0)
    hexString.Append(' ');
  // Append next hex pair (i.e., formatted byte)
  hexString.AppendFormat("{0:x2}",b);
}

Console.WriteLine(hexString);

Upvotes: 1

joe_coolish
joe_coolish

Reputation: 7259

If the user is inputting it into the command line just like that, do this:

        string input = GetInput(); // this is where you get the input
        string[] numbs = input.Split(' ');
        byte[] array = new byte[numbs.Length];
        int i = 0;

        foreach (var numb in numbs)
        {
            array[i++] = byte.Parse(numb, NumberStyles.HexNumber);
        }

Upvotes: 8

Ani
Ani

Reputation: 113402

Try:

string text = ...
byte[] bytes = text.Split()
                   .Select(t => byte.Parse(t, NumberStyles.AllowHexSpecifier))
                   .ToArray();

If you want to only split on the space-character (rather than any whitespace) use Split (' ').

Upvotes: 14

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