Convert string to hex and send on TCP port - C#

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hi everyone

How can I send this packet?
{68}{31}{39}{33}{32}{32}{37}{16}

What I have tried:

C#

string serialnumber = "193227";
byte[] k = Encoding.Default.GetBytes(serialnumber);
var hexString = BitConverter.ToString(k); //My string converted to hex: {31}{39}{33}{32}{32}{37}

byte start = 0x68;
int middle = hexString;
byte end = 0x16;
byte[] packet = new byte[] { start, middle, end };

ns.Write(packet, 0, packet.Length);

Finaly I want to send: {68}{31}{39}{33}{32}{32}{37}{16}
thanks for help

Posted 17-Oct-16 23:46pm

versers777

Updated 18-Oct-16 0:07am

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#realJSOP 18-Oct-16 6:10am

Why aren't you just doing this?

string serialNumber = "h193227" + char(22);
byte[] packet = Encoding.Default.GetBytes(serialNumber);
ns.Write(packet, 0, packet.Length);

Michael Corbett 24-Jan-22 19:16pm

Yep! No need to reinvent the wheel. This is a simpler solution.

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OriginalGriff · Answer 1 · 2016-10-18T00:07:00

That is unlikely to be anything like what you want - because the BitConverter.ToString Method (Byte[]) (System)[^] mocverts an array of byte values to a string of hex digits, separated by hyphens:

00-01-02-04-08-10-20-40-80

And it's a lot, lot more likely that you destination needs the raw hex values - which you already have inside the byte array.
Try this:

C#

private const byte start = 0x68;
private const byte end = 0x16;
private byte[] Enpack(byte[] data)
    {
    int packetLength = 1 + data.Length + 1;
    byte[] packet = new byte[packetLength];
    packet[0] = start;
    packet[packetLength - 1] = end;
    Array.Copy(data, 0, packet, 1, packetLength - 2);
    return packet;
    }

And you might want to replace the Default encoding with a specific set: Ascii perhaps, or UTF8 depending on the destination.