CODEWITHSUNDEEP
c#.net
Animal Style
Animal Style

Reputation: 709

Converting part of a byte[] to Enum

I am converting two properties string TokenValue and TokenType which is enum TokenType : byte I am able to convert to a byte array using the below method and separating the two properties with a %.

public byte[] ToByteArray()
{
    List<Byte> bytes = new List<byte>();
    bytes.AddRange(Encoding.ASCII.GetBytes(TokenValue));
    bytes.AddRange(Encoding.ASCII.GetBytes("%"));
    bytes.Add((byte)this.TokenType);
    return bytes.ToArray();
}

My problem is trying to convert back using:

    public void FromByteArray(byte[] value)
    {
        Regex reg = new Regex("%");
        string str = Encoding.UTF8.GetString(value);
        string[] fields = reg.Split(str);
        if (fields.Count() > 1)
        {
        TokenValue = fields[0];
        TokenType = (TokenType)Encoding.ASCII.GetBytes(fields[1]); //Something along these lines to convert back to the TokenType
        }
        else if (fields.Count() == 1)
        {
        TokenValue = fields[0];
        }
}

Not sure how to convert the bytes back to the enum TokenType Thanks in advance.

Upvotes: 1

Views: 3377

Answers (1)

Sphinxxx
Sphinxxx

Reputation: 13017

In ToByteArray() you convert everything to bytes and then concatenate the byte values. Therefore, in FromByteArray(), you need to split the byte array before you decode it into strings etc:

public void FromByteArray(byte[] value)
{
    var delimiter = (byte)'%';

    var stringBytes = value.TakeWhile(b => b != delimiter).ToArray();

    var enumByte = 0;
    if (stringBytes.Length < value.Length)
    {
        enumByte = value.Last();
    }

    TokenValue = Encoding.ASCII.GetString(stringBytes);
    TokenType = (TokenType)enumByte;
}

Upvotes: 2

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