在 C# (CSV) 中将字符串转换为字节数组

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?

Answer 1

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();

Answer 2

考虑使用拆分字符串

Answer 3

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);

Answer 4

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.

Answer 5

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

Answer 6

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

Answer 7

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++;
        }

Answer 8

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.

Answer 9

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();
}