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c# - Compact Framework Socket 文件打印

问题描述

我正在尝试从 Windows ce 设备将文档打印到网络激光打印机。由于我正在尝试打印示例文本，因此没有问题，并且我可以通过套接字来实现，我的问题是我需要在文本下方打印一些文本和一个小图像，例如：

not formatted text
------------------
|    IMAGE       |
------------------
other not formatted text

我的第一个想法是构建一个 Rtf 文档并将其发送到打印机 trought sokets，但它显然是打印文档文本内容而不是格式化文本......我尝试了许多其他方法来编码要发送的数据但没有结果......有办法做到这一点还是我只是在浪费时间？如果没有，有办法归档发送 PCL/PostScript 数据吗？（通常驱动程序是新激光打印机上基本命令的“标准”）。这就是我用来在网络打印机上打印的功能：

public static string print_data_to_IP(string printerIP, int printerPort, byte[] myEncoded_bytes)
        {
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //Not supported
            //socket.NoDelay = true;

            IPAddress ip = IPAddress.Parse(printerIP);
            IPEndPoint ipEndPoint = new IPEndPoint(ip, printerPort);
            socket.Connect(ipEndPoint);
            socket.Send(myEncoded_bytes);
            socket.Close();
            return null;
        }

和 myEncoded_bytes 由：

MemoryStream ms = new MemoryStream();
            using (FileStream stream = File.Open("\\test.rtf", FileMode.Open))
            {
                byte[] stream_to_byte_array = new byte[stream.Length];
                stream.Read(stream_to_byte_array, 0, (int)stream.Length);
                ms = new MemoryStream(stream_to_byte_array);
                stream.Close();
            }
byte[] data = ms.ToArray();

谢谢您的帮助，

军团

PS：不允许使用外部库，所以我不能使用 printCE 或类似的“帮助”。

标签： c#socketscompact-framework

解决方案

对不起，我试图更好地解释我是如何达到目标的，这是一个在@josef链接之后创建的示例函数，我在选定的位置写了一些文本并在屏幕中央画了一个红色框（评论解释了 pcl 命令的工作原理）。按照 PCL 手册，您可以根据需要轻松自定义文本和绘图 ( HERE_AN_HP_MANUAL )。

        private void btn_pcl_printing_Click(object sender, EventArgs e)
        {
            string printer_ip = "192.168.1.6";

            char command_start_character = '\u001B';
            char carriage_return = '\u000D';
            char line_feed = '\u000A';
            string lane_escape_character = string.Concat(carriage_return, line_feed); //"\r\n";
#if PJL
            string printer_process_name = "prova.TXT";
            string raw_end_of_file = command_start_character + "%–12345X" + " @PJL EOF" + lane_escape_character;
            raw_end_of_file += command_start_character + "%–12345X";
            string raw_to_print = command_start_character + "%–12345X";
            raw_to_print += " @PJL JOB NAME = \"" + printer_process_name  + "\"" + lane_escape_character;
            raw_to_print += " @PJL ENTER LANGUAGE = PCL" + lane_escape_character;
#else
            //Reset the printer and start a new PAGE
            string raw_to_print = command_start_character + "E";
#endif
            //Set Printer resolution to 150 DPI
            string raw_pcl_commands = command_start_character + "&u150D" + command_start_character + "*t150R";
            //Write "Hello Wold!!" at the position 150x and 150y (the command is case sensitive).
            raw_pcl_commands += command_start_character + "*p150x150Y" + "Hello World!!!";
            //Another way to to what i've just done before
            //raw_pcl_commands += command_start_character + "*p150X" + command_start_character + "*p150Y" + "Hello World!!!";
            raw_pcl_commands += command_start_character + "*p150X" + command_start_character + "*p150Y" + "Hello World!!!";
            //I choose to use RGB colors (v6), select an rgb color (a0,b0,c0) and save it an a palette (i0) that i select (i0S). My selected color is RED (255,0,0)
            raw_pcl_commands += command_start_character + "*v6w255a0b0c0i0S";
            //Another way to to what i've just done before
            //raw_pcl_commands += command_start_character + "*v6W";
            //raw_pcl_commands += command_start_character + "*v255a0b0C" + command_start_character + "*v0i0S";
            //Draw a rectangle 300*150
            raw_pcl_commands += command_start_character + "*c300a150b5P";


            //COMANDI PCL
            raw_pcl_commands += command_start_character + "E";
            raw_to_print += raw_pcl_commands;
#if PJL
            raw_to_print += raw_end_of_file;
#endif

            byte[] myEncoded_bytes = Encoding.UTF8.GetBytes(raw_to_print);
            Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //Not supported on CE
            //socket.NoDelay = true;
            int printerPort = 9100;
            IPAddress ip = IPAddress.Parse(printer_ip);
            IPEndPoint ipEndPoint = new IPEndPoint(ip, printerPort);
            socket.Connect(ipEndPoint);
            socket.Send(myEncoded_bytes);
            socket.Close();
        }

现在对于图像，您有 2 种方法可以遵循：

1）使用PCL命令“手动”绘制图像，请参见该手册的第41页以查看一些示例（如果是一个简单的例子，就像我的例子一样，那么简单的条形码是最好的方法）。

2）用 PCL 宏绘制图像....这就是我能说的，因为阅读该文档让我头疼并迫使我选择方法 1：D

希望对你有帮助，军团

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