Convert image to Ascii hexadecimal code in Net Core

Convert image to Ascii hexadecimal code in Net Core // Expert user has replied. R Ricardo Vivas 2 years 6 months ago 419 1 0 Hi. I currently have a problem converting an image to hex code to be displayed in the ZPL code. I've tried many code snippets to no avail public static string ByteArrayToString(byte[] ba) { StringBuilder hex = new StringBuilder(ba.Length * 2); for (int i = 0; i < ba.Length; i++) // <-- Use for loop is faster than foreach hex.Append(ba[i].ToString("X2")); // <-- ToString is faster than AppendFormat return hex.ToString(); } I am using Net Core 3.1 Any idea how to convert the image?

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1 Replies

J James Swinton-Bland 2 years 6 months ago

Hi,

Maybe you could try this method

private static final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
    char[] hexChars = new char[bytes.length * 2];
    for (int j = 0; j < bytes.length; j++) {
        int v = bytes[j] & 0xFF;
        hexChars[j * 2] = HEX_ARRAY[v >>> 4];
        hexChars[j * 2 + 1] = HEX_ARRAY[v & 0x0F];
    }
    return new String(hexChars);
}

Thanks,

James