usingSystem;usingSystem.Collections.Generic;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Net;usingSystem.Net.Sockets;namespacePOSPrinter

{///

///POSPrinter的摘要说明。///此类处理网络打印,使用了IP端口.///

public classNetPOSPrinter

{string ipPort = "127.0.0.1";publicNetPOSPrinter()

{

}public NetPOSPrinter(stringIpPort)

{this.ipPort = IpPort;//打印机端口

}///

///输出文字到打印机///

/// 要打印的内容

public void PrintLine(stringstr)

{//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 = newSocket(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 voidPrintPic(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 = newSocket(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();

}///

///打开钱箱///

public voidOpenCashBox()

{

IPAddress ipa=IPAddress.Parse(ipPort);

IPEndPoint ipe= new IPEndPoint(ipa, 9100);//9100为小票打印机指定端口

Socket soc = newSocket(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();

}

}

}