C# 热敏打印机 Socket 网络链接 打印 图片 （一）

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;

namespace POSPrinter
{
///   <summary>
///   POSPrinter的摘要说明。
///   此类处理网络打印,使用了IP端口.
///   </summary>
public class NetPOSPrinter
{
string ipPort = "127.0.0.1";

public NetPOSPrinter()
{
}

public NetPOSPrinter(string IpPort)
{
this.ipPort = IpPort;//打印机端口
}

///   <summary>
///   输出文字到打印机
///   </summary>
///   <param   name= "str "> 要打印的内容 </param>
public void PrintLine(string str)
{
//建立连接
IPAddress ipa = IPAddress.Parse(ipPort);
IPEndPoint ipe = new IPEndPoint(ipa, 9100);//9100为小票打印机指定端口
Socket soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soc.Connect(ipe);

//string str= "hello,123456789,大家好! ";

byte[] b = System.Text.Encoding.GetEncoding("GB2312").GetBytes(str);
soc.Send(b);
soc.Close();
}

public void PrintPic(Bitmap bmp)
{
//把ip和端口转化为IPEndPoint实例
IPEndPoint ip_endpoint = new IPEndPoint(IPAddress.Parse(ipPort), 9100);

//创建一个Socket
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

//连接到服务器
socket.Connect(ip_endpoint);
//应对同步Connect超时过长的办法，猜测应该是先用异步方式建立以个连接然后，
//确认连接是否可用，然后报错或者关闭后，重新建立一个同步连接

//socket.SendTimeout = 1000;

//初始化打印机，并打印

Byte[] byte_send = Encoding.GetEncoding("gb18030").GetBytes("\x1b\x40");

//发送测试信息
socket.Send(byte_send, byte_send.Length, 0);

byte[] data = new byte[] { 0x1B, 0x33, 0x00 };
socket.Send(data, data.Length, 0);
data[0] = (byte)'\x00';
data[1] = (byte)'\x00';
data[2] = (byte)'\x00';    // Clear to Zero.

Color pixelColor;

// ESC * m nL nH 点阵图
byte[] escBmp = new byte[] { 0x1B, 0x2A, 0x00, 0x00, 0x00 };

escBmp[2] = (byte)'\x21';

//nL, nH
escBmp[3] = (byte)(bmp.Width % 256);
escBmp[4] = (byte)(bmp.Width / 256);

// data
for (int i = 0; i < (bmp.Height / 24) + 1; i++)
{
socket.Send(escBmp, escBmp.Length, 0);

for (int j = 0; j < bmp.Width; j++)
{
for (int k = 0; k < 24; k++)
{
if (((i * 24) + k) < bmp.Height)   // if within the BMP size
{
pixelColor = bmp.GetPixel(j, (i * 24) + k);
if (pixelColor.R == 0)
{
data[k / 8] += (byte)(128 >> (k % 8));
}
}
}

socket.Send(data, 3, 0);
data[0] = (byte)'\x00';
data[1] = (byte)'\x00';
data[2] = (byte)'\x00';    // Clear to Zero.
}

byte_send = Encoding.GetEncoding("gb18030").GetBytes("\n");

//发送测试信息
socket.Send(byte_send, byte_send.Length, 0);
} // data

byte_send = Encoding.GetEncoding("gb18030").GetBytes("\n");

//发送测试信息
socket.Send(byte_send, byte_send.Length, 0);
socket.Close();
}

///   <summary>
///   打开钱箱
///   </summary>
public void OpenCashBox()
{
IPAddress ipa = IPAddress.Parse(ipPort);
IPEndPoint ipe = new IPEndPoint(ipa, 9100);//9100为小票打印机指定端口
Socket soc = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
soc.Connect(ipe);
char[] c = { Convert.ToChar(27), 'p', Convert.ToChar(0), Convert.ToChar(60), Convert.ToChar(255) };
byte[] b = System.Text.Encoding.GetEncoding("GB2312").GetBytes(c);
soc.Send(b);
soc.Close();
}

}
}