C# 收银机顾显，客显及打印小票
最近做winform收银机，设计顾显及打印小票总结。
1、顾显（串口COM1）
只涉及到总计，所以只是简单的功能。
public static ClientDisplayResult Display(decimal total, bool isClear=false)
{
var result = new ClientDisplayResult();
string[] ports = SerialPort.GetPortNames();
if (ports.Length == 0)
{
result.Result = false;
result.Message = "未检测到串行通信接口";
Logger.Error(result.Message);
return result;
}
SerialPort serialPort = new SerialPort();
try
{
// 串行端口 Windows：COM1
serialPort.PortName = "COM1";
//串口波特率 默认：2400
serialPort.BaudRate = 2400;
//停止位 默认
serialPort.StopBits = StopBits.One;
//数据位 默认
serialPort.DataBits = 8;
if (!serialPort.IsOpen)
{
serialPort.Open();
}
//清空接收缓冲区数据
serialPort.DiscardInBuffer();
if (isClear)
{
//清屏\f
serialPort.WriteLine(((char)12).ToString());
}
else
{
//状态，合计提示灯亮（ESCs2)
var text = ((char)27).ToString() + ((char)115).ToString() + ((char)50).ToString();
serialPort.Write(text);
//显示收款金额（EscQA金额CR）
text = ((char)27).ToString() + ((char)81).ToString() + ((char)65).ToString() + total.ToString() + ((char)13).ToString();
serialPort.Write(text);
}
result.Result = true;
return result;
}
catch (Exception ex)
{
Logger.Error("顾显异常",ex);
result.Result = false;
result.Message = ex.Message;
return result;
}
finally
{
serialPort.Close();
serialPort.Dispose();
}
}2、打印小票（并口打印）及打开钱箱（OpenDrawer方法）
通过Windows API接口
public class LPTControl
{
#region API函数
[StructLayout(LayoutKind.Sequential)]
private struct OVERLAPPED
{
int Internal;
int InternalHigh;
int Offset;
int OffSetHigh;
int hEvent;
}
[DllImport("kernel32.dll")]
private static extern int CreateFile(string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);
[DllImport("kernel32.dll")]
private static extern bool WriteFile(int hFile, byte[] lpBuffer, int nNumberOfBytesToWrite, out int lpNumberOfBytesWritten, out OVERLAPPED lpOverlapped);
[DllImport("kernel32.dll")]
private static extern bool CloseHandle(int hObject);
#endregion
public enum PrintPosition { Left, Center, Right }
private int iHandle;
private const int ColWidth = 32;
private bool Write(string data)
{
if (iHandle != -1)
{
int i;
OVERLAPPED x;
byte[] byteData = System.Text.Encoding.Default.GetBytes(data);
return WriteFile(iHandle, byteData, byteData.Length, out i, out x);
}
else
{
return false;
}
}
private bool Write(byte[] data)
{
if (iHandle != -1 && data.Length > 0)
{
int i;
OVERLAPPED x;
return WriteFile(iHandle, data, data.Length, out i, out x);
}
else
{
return false;
}
}
public bool OpenPort()
{
iHandle = CreateFile("LPT1", 0x40000000, 0, 0, 3, 0, 0);
if (iHandle != -1)
{
return true;
}
else
{
return false;
}
}
public bool Close()
{
return CloseHandle(iHandle);
}
public bool WriteLine(string data, PrintPosition position = PrintPosition.Left)
{
int length = Encoding.Default.GetBytes(data).Length;
if (length < ColWidth)
{
if (position == PrintPosition.Right)
{
data = data.PadLeft(ColWidth - (length - data.Length), ' ');
}
else if (position == PrintPosition.Center)
{
data = data.PadLeft(length + (ColWidth - length) / 2 - (length - data.Length), ' ');
}
}
bool result = Write(data);
if (result)
{
result = NewRow();
}
return result;
}
private bool NewRow()
{
bool result = false;
var byteData = new byte[] { 27, 10, 13 };
return result = Write(byteData);
}
public bool PrintEmptyRow(int rowCount = 1)
{
bool result = false;
string data = string.Empty.PadLeft(ColWidth, ' ');
for (int i = 0; i < rowCount; i++)
{
result = WriteLine(data);
if (!result) break;
}
return result;
}
public bool PrintLine(bool isDoubleLine = false)
{
if (isDoubleLine)
{
return WriteLine("================================");
}
else
{
return WriteLine("--------------------------------");
}
}
public bool OpenDrawer()
{
bool result = Write(((char)27).ToString() + "p" + ((char)0).ToString() + ((char)60).ToString() + ((char)255).ToString());
return result;
}
}调用：
public static void Print(OrderInfo orderInfo)
{
try
{
if (orderInfo != null)
{
var orderDetailList = GetOrderDetail(orderInfo.OrderId);
if (orderDetailList.IsNullOrEmpty())
{
Logger.Error("订单详情获取异常：OrderId" + orderInfo.OrderId);
return;
}
LPTControl control = new LPTControl();
var result = control.OpenPort();
if (!result)
{
Logger.Error("LPT1端口打开失败");
return;
}
control.WriteLine(orderInfo.SupermarketName, LPTControl.PrintPosition.Center);
control.PrintEmptyRow();
control.WriteLine($"订单号：{orderInfo.OrderId}");
control.WriteLine($"时间：{orderInfo.PayTime}");
control.WriteLine($"收银员：{orderInfo.AccountName}");
control.PrintLine(true);
int i = 1;
foreach (var item in orderDetailList)
{
control.WriteLine($"{i}、{item.GoodsName}");
var price = (decimal)item.Price;
var num = $"{item.GoodsCount}*{price.ToString("#0.00")}".PadLeft(13, ' ');
var total = (price * item.GoodsCount).ToString("#0.00").PadLeft(10, ' ');
var text = $" {item.SKUID}{num}{total}";
control.WriteLine(text);
i++;
}
control.PrintLine();
if (orderInfo.OrderType == OrderType.Dispatching)
{
control.WriteLine($"配送费：{orderInfo.DeliveryAmount.ToString("#0.00")}元");
}
if (orderInfo.UsedScoreAmount > 0)
{
control.WriteLine($"积分抵扣：{ orderInfo.UsedScoreAmount}元");
}
var payType = orderInfo.PayWay.GetDescription();
if (orderInfo.OrderBusinessType == OrderBuyType.ToShop)
{
payType = OrderPayWay.CashPay.GetDescription();
}
control.WriteLine($"支付方式：{payType}");
control.WriteLine($"合计：{orderInfo.Total.ToString("#0.00")}元");
control.WriteLine($"应付：{ orderInfo.PayedAmount.ToString("#0.00")}元");
if (orderInfo.UserTotal > 0)
{
control.WriteLine($"赠送积分：{ orderInfo.UserTotal}");
}
if (orderInfo.OrderType == OrderType.Dispatching)
{
control.PrintLine(true);
control.WriteLine($"联系人：{orderInfo.TrueName}");
control.WriteLine($"手机号：{ orderInfo.DisplayMobile}");
control.WriteLine($"地址：{orderInfo.Address}");
control.WriteLine($"配送时间：{orderInfo.ExpectDispatchTimeText}");
}
control.PrintLine();
control.WriteLine("谢谢惠顾，欢迎下次光临！");
control.PrintEmptyRow(5);
control.OpenDrawer();
control.Close();
System.Threading.Thread.Sleep(500);
}
else
{
Logger.Error("订单异常");
}
}
catch (Exception ex)
{
Logger.Error("打印小票异常", ex);
}
}