Converting string to byte array in C# (CSV)

Question

I wrote a function to convert byte[] to string, and I add ";" after each byte. Now I want to convert this string to byte[] by splitting the string (similar to a CSV string).

public string ByteArrayToString(byte[] byteArray,string s)
{       
    for (int i = 0; i < byteArray.Length; i++)
    {
        s += byteArray[i].ToString() + ";";
    }
    s = s.Substring(0, s.Length - 1);
    return s;
}

How could I write a function to convert this string to that byte array again?

"thanks BUT it couldn't help me! i want to split my string by ";" then put it in the array then convert it to byte [] " try to write some pseudo code for this so we can see what you want. My understading of that qoute is you want to cast a string[] to a byte[] while interpreting the string values as a byte each. Which is not possible. You need to convert each value — Rune FS
– Rune FS, Commented Nov 30, 2010 at 12:29

Dean Chalk · Accepted Answer · 2010-11-30 12:03:39Z

7

try this

var byteArray = new byte[] {123, 11, 111};
var stringBytes = string.Join(";", byteArray.Select(b => b.ToString()));
var newByteArray = stringBytes.Split(';').Select(s => byte.Parse(s)).ToArray();

answered Nov 30, 2010 at 12:03

Dean Chalk

20.5k6 gold badges66 silver badges95 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Øyvind Bråthen · Accepted Answer · 2010-11-30 12:06:30Z

3

I guess that you want to get rid of the ; when converting also. I think you want to do something like this:

byte[] result = Encoding.UTF8.GetBytes(s.Replace(";",""));

This will fail if the original byte array actually contains a ;that is valid data, but in that case you will have lots of problems anyway since your "CSV" file will be wrongly formatted.

answered Nov 30, 2010 at 12:06

Øyvind Bråthen

60.9k28 gold badges128 silver badges154 bronze badges

Comments

Shamim Hafiz - MSFT · Accepted Answer · 2010-11-30 12:00:10Z

1

Consider using Split String

answered Nov 30, 2010 at 12:00

Shamim Hafiz - MSFT

22.2k44 gold badges122 silver badges183 bronze badges

1 Comment

sss Over a year ago

thanks BUT it couldn't help me! i want to split my string by ";" then put it in the array then convert it to byte []

Shwabster · Accepted Answer · 2020-09-15 16:42:40Z

1

StringBuilder will be useful instead of String (Performance wise).

With StringBuilder:

byte[] buffer = System.Text.Encoding.UTF8.GetBytes(objStringBuilder.ToString());

with String:

byte[] buffer = System.Text.Encoding.UTF8.GetBytes(objString);

edited Sep 15, 2020 at 16:42

Shwabster

4871 gold badge11 silver badges27 bronze badges

answered Nov 30, 2010 at 12:02

indiPy

8,1223 gold badges31 silver badges39 bronze badges

Comments

Ramiz Uddin · Accepted Answer · 2010-11-30 12:04:11Z

0

System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
return encoding.GetBytes(yourStringVariable);

answered Nov 30, 2010 at 12:04

Ramiz Uddin

4,2694 gold badges43 silver badges73 bronze badges

1 Comment

Rune FS Over a year ago

the values are "printed" some 32 is "32" not " " as your code expects

NicoRiff · Accepted Answer · 2011-03-02 20:02:13Z

0

I know you already know the answer by now... but this code solves the problem, i hope it helps someone else.

        int counter= 0;
        string cadena = "8,5,6,3,4,6,3"
        string[] foto = cadena.Split(',');
        byte[] fotoFinal = new byte[foto.Length];
        foreach (string s in foto)
        {
            fotoFinal[contador] = Convert.ToByte(s);
            counter++;
        }

answered Mar 2, 2011 at 20:02

NicoRiff

4,8933 gold badges29 silver badges57 bronze badges

Comments

Brad Rem · Accepted Answer · 2012-08-17 19:15:18Z

0

str.Split(new char[]{';'}, 
          StringSplitOptions.RemoveEmptyEntries).Select(s => byte.Parse(s)).ToArray();

edited Aug 17, 2012 at 19:15

Brad Rem

6,0262 gold badges27 silver badges50 bronze badges

answered Nov 30, 2010 at 12:01

Itay Karo

18.4k4 gold badges43 silver badges59 bronze badges

3 Comments

sss Over a year ago

thanks BUT it couldn't help me! i want to split my string by ";" then put it in the array then convert it to byte []

Itay Karo Over a year ago

Try this: Encoding.UTF8.GetBytes(str.Replace(";", string.Empty);

Rune FS Over a year ago

wont work byteArray[i].ToString() + ";" does not concatenate the byte values as char but uses 1-3 char pr. byte

Evgeny Lazin · Accepted Answer · 2012-11-15 06:43:39Z

0

Simply :)

public static byte[] Bytes ( this string Key )
{
    return Enumerable.Range(0, Key.Binary().Length / 8 )
                     .Select(Index => Convert.ToByte(
                         Key.Binary().Substring(Index * 8, 8), 2))
                     .ToArray();
}

edited Nov 15, 2012 at 6:43

Evgeny Lazin

9,4636 gold badges51 silver badges86 bronze badges

answered Mar 9, 2012 at 0:43

Ahmed Ghoneim

7,0679 gold badges51 silver badges80 bronze badges

Comments

dcarl661 · Accepted Answer · 2019-03-07 22:20:14Z

0

string[] sbytes   = sl.Split(',');
                    byte[] b          = new byte[sbytes.Length];
                    for (int j = 0; j < sbytes.Length; j++)
                    {
                        byte newByte  = byte.Parse(sbytes[j], System.Globalization.NumberStyles.HexNumber);
                        b[j]          = newByte;
                    }

I like using number styles hex number.

answered Mar 7, 2019 at 22:20

dcarl661

3224 silver badges12 bronze badges

Collectives™ on Stack Overflow

Converting string to byte array in C# (CSV)

9 Answers 9

Comments

Comments

1 Comment

Comments

1 Comment

Comments

3 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

9 Answers 9

Comments

Comments

1 Comment

Comments

1 Comment

Comments

3 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related