C# 使用C/S模式操作小票机打印

此方式适用于市场上大多数的小票机 佳博、POS58 等，不适用于有些标签打印机 比如斑马打印机等

直接贴代码：

 

 private FileStream fs = null;

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]//调用系统API打印函数

        public static extern IntPtr CreateFile

        (

            string FileName,          // file name

            uint DesiredAccess,       // access mode

            uint ShareMode,           // share mode

            uint SecurityAttributes,  // Security Attributes

            uint CreationDisposition, // how to create

            uint FlagsAndAttributes,  // file attributes

            string hTemplateFile      // handle to template file

        );





        /// <summary>

        /// 打印小票

        /// </summary>

        /// <param name="msg"></param>

        /// <returns></returns>

        public string PrintMsg(string PosPort, string msg, bool isOpenMoneyBox)

        {

            try

            {

                IntPtr iHandle = CreateFile(PosPort, 0x40000000, 0, 0, 3, 0, null);

                if (iHandle.ToInt32() == -1)

                {

                    return "票机连接失败.或者端口号错误.请测试打印机是否正常!";

                }

                else

                {

                    try

                    {

                        fs = new FileStream(iHandle, FileAccess.ReadWrite);

                        StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.Default);   //写数据   

                        sw.WriteLine(msg);

                        //开启钱箱

                        if (isOpenMoneyBox)

                        {

                            sw.Write(((char)27).ToString() + "p" + ((char)0).ToString() + ((char)60).ToString() + ((char)255).ToString());

                        }

                        sw.Flush();

                        sw.Close();

                        fs.Close();

                        return "";

                    }

                    catch (Exception ex)

                    {

                        return ex.InnerException == null ? ex.Message : ex.InnerException.Message;

                    }

                }

            }

            catch (Exception exp)

            {

                return "TPL或者COM口连接失败！";

            }

        }

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