How to print a bill from POS printer in .net using socket?

Question

I have an ASP Web API and network printer(Epson TM-U220). I need to select the printer by code and print a bill. I just try as bellow. But not work fine. I want to print this direct using pos printer

var server = "192.168.1.164";
var nome = "www.pdf";

Socket clientSocket = new Socket(AddressFamily.InterNetwork, 
SocketType.Stream, ProtocolType.Tcp);
clientSocket.NoDelay = true;

IPAddress ip = IPAddress.Parse(server);
IPEndPoint ipep = new IPEndPoint(ip, 9100);
clientSocket.Connect(ipep);

clientSocket.Send(File.ReadAllBytes(nome));
clientSocket.Close();

Answer 1

I try this and it works fine. But still, I cannot get printer status.

//--printer script model
public class DirectPrintingScript
{
    public string Value { get; set; }
    public int PrintMethodID { get; set; }
    public bool IsNeedPrint { get; set; }
}

//--print method
public void print(List<DirectPrintingScript> result, string IP, int Port)
{
    var job = new DirectPrinterProcess();
    Socket clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
    clientSocket.NoDelay = true;

    IPAddress ip = IPAddress.Parse(IP);
    IPEndPoint ipep = new IPEndPoint(ip, Port);
    clientSocket.Connect(ipep);
    Encoding enc = Encoding.ASCII;

    foreach (DirectPrintingScript item in result)
    {
        var command = job.SelectMethod(item.PrintMethodID);
        byte[] commandBytes = Encoding.ASCII.GetBytes(command);
        byte[] contentBytes = Encoding.ASCII.GetBytes(item.Value);
        clientSocket.Send(commandBytes);

        if (item.IsNeedPrint)
        {
           clientSocket.Send(contentBytes);
           var n = job.NewLine();
           byte[] nBytes = Encoding.ASCII.GetBytes(n);
           clientSocket.Send(nBytes);
        }
     }

     // Line feed hexadecimal values
     byte[] bEsc = new byte[4];
     bEsc[0] = 0x0A;
     bEsc[1] = 0x0A;
     bEsc[2] = 0x0A;
     bEsc[3] = 0x0A;

     // Send the bytes over 
     clientSocket.Send(bEsc);

     clientSocket.Close();
}

//--print method process
    public class DirectPrinterProcess
    {
        public string SelectMethod(int MethodID)
        {
            switch (MethodID)
            {
                case 1:
                    return JustificationCenter();
                case 2:
                    return JustificationLeft();
                case 3:
                    return DoubleHeight();
                case 4:
                    return DoubleWidth();
                case 5:
                    return CancelDoubleHeightWidth();
                case 6:
                    return SetColorRed();
                case 7:
                    return SetColorBlack();
                default:
                    return CancelDoubleHeightWidth();
            }
        }

        private string JustificationCenter()
        {
            return "" + (char)27 + (char)97 + (char)1;
        }

        private string JustificationLeft()
        {
            return "" + (char)27 + (char)97 + (char)0;
        }

        private string DoubleHeight()
        {
            return "" + (char)27 + (char)33 + (char)16;
        }

        private string DoubleWidth()
        {
            return "" + (char)27 + (char)33 + (char)32;
        }

        private string CancelDoubleHeightWidth()
        {
            return "" + (char)27 + (char)33 + (char)0;
        }

        private string SetColorRed()
        {
            return "" + (char)27 + (char)114 + (char)1;
        }

        private string SetColorBlack()
        {
            return "" + (char)27 + (char)114 + (char)0;
        }

        public string NewLine()
        {
            return "" + "\n";
        }
    }