How to convert string array to byte array in c#

Question

So i have a string

string enc = ""hx0.+dhx0-pdhx0pzdhx0xx";

This is encrypted and when decrypted has the hexadecimal values, the starting values are "0xfc,0xe8,0x82,0x00"

Then this

string decrypted = encryptDecrypt(enc);

then this then i divided it after every comma to with the split command string[] hi = decrypted.Split(',');

When i check using this code

foreach (var item in hi )
{
    Console.WriteLine(item.ToString());
}

it shows all the hexadecimal in side it i want to turn string array values which are 0xfc,0xe8,0x82,0x00 and more into byte array values which are 0xfc,0xe8,0x82,0x00 too not some other values

The `Convert.ToByte` method will convert a `string` to a `byte`, e.g. `var b = Convert.ToByte(hexString, 16);`. You just have to do that for each element in whatever way you deem appropriate, e.g. using `Array.ConvertAll`. — jmcilhinney, Jul 09 '18 at 02:52
Possible duplicate of [Converting string to byte array in C#](https://stackoverflow.com/questions/16072709/converting-string-to-byte-array-in-c-sharp) — Mick, Jul 09 '18 at 02:54
Not 100% sure what you're asking, but check out Encoding.UTF8.GetBytes(item); — Josh, Jul 09 '18 at 03:05

score 1 · Answer 1 · answered Jul 09 '18 at 03:04

1

Is that the only string, or does that value change? Does your array need to be dynamic?

     string [] arrayString = new string []; //Your Array.

     byte [] arrayByte = new byte[arrayString.Length];

     for (int i = 0; i < arrayString.Length; i++)
     {
          arrayByte[i] = Convert.ToByte(arrayString[i], 16);
     }

answered Jul 09 '18 at 03:04

This code will take in any string type array of any size and convert it to a byte array of any size. Keep in mind it doesn't overwrite your string array but if you wanted to add a line of code w/in the for loop to do that you can. – Jul 09 '18 at 16:11
System.FormatException: 'Could not find any recognizable digits.' i gete this error while trying to run Byte[] b = Array.ConvertAll(hi, h => Convert.ToByte(h, 16)); – Agent Magma Jul 10 '18 at 00:35
Remember that arrays start with 0. Take out the “=“ and it shouldn’t crash. – Jul 10 '18 at 17:16

score 1 · Answer 2 · answered Jul 09 '18 at 03:38

1

Sample input:

String[] hi = "00,01,fe,ff".Split(',');

Conversion using a lambda function to convert each hexadecimal string to a byte:

Byte[] b = Array.ConvertAll(hi, h => Convert.ToByte(h, 16));

If you want a different kind of delegate:

Byte[] b = Array.ConvertAll(hi, HexToByte);

private Byte HexToByte(String h) 
{
    return Convert.ToByte(h, 16);
}

Same, with an expression-bodied function:

Byte[] b = Array.ConvertAll(hi, HexToByte);

private Byte HexToByte(String h) => Convert.ToByte(h, 16);

Or yet a different kind of delegate:

Converter<String, Byte> hexToByte = h => Convert.ToByte(h, 16);
Byte[] b = Array.ConvertAll(hi, hexToByte);

Array.ConvertAll is doing the real work. Conversion from hex is either a trivial idea that can be done inline or an important idea that can be given a name and/or a full implementation block.

answered Jul 09 '18 at 03:38

Tom Blodget

20,260
3
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System.FormatException: 'Could not find any recognizable digits.' i gete this error while trying to run Byte[] b = Array.ConvertAll(hi, h => Convert.ToByte(h, 16)); – Agent Magma Jul 10 '18 at 00:34
It works for "0xfc,0xe8,0x82,0x00". You must have some other characters in the string that aren't hex digits or the 0x prefix, or separating commas. Or perhaps you just have a 0x without following hex digits. – Tom Blodget Jul 10 '18 at 10:08
FormatException is as informative as it could be so: `Byte[] b = Array.ConvertAll(hi, h => { try { return Convert.ToByte(h, 16); } catch (FormatException ex) { throw new FormatException($@"Can't parse ""{h}""", ex);} });` – Tom Blodget Jul 10 '18 at 10:15

score 0 · Answer 3 · answered Jul 09 '18 at 03:03

Convert each of the strings into byte and then store it to str variable.

byte[,] str = new byte[50,50];
int i = 0;
foreach (var item in hi)
{
    Console.WriteLine(item.ToString());
    byte[] arr = Encoding.ASCII.GetBytes(item.ToString());
    str[i] = arr;
    i++;
}

For more information, see this link

score 0 · Answer 4 · answered Jul 09 '18 at 03:06

0

For some text is not Ascii that you can use Utf-8 to convert string to byte.

System.Text.Encoding.UTF8.GetBytes(item);

answered Jul 09 '18 at 03:06

lindexi

4,182
3
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score -1 · Answer 5 · answered Jul 09 '18 at 02:56

-1

To convert from a string to a byte array, you can use the GetBytes method:

System.Text.Encoding.ASCII.GetBytes(item);

answered Jul 09 '18 at 02:56

mousebyte

61
7

GetBytes takes as argument a char[] or string not string[] – Mehdi Souregi Jan 17 '19 at 11:40

How to convert string array to byte array in c#

5 Answers5