C# 打印小票 POS

C# 打印小票 POS

       最近在写一个餐饮的收银系统，以前从来没有碰过打印机这玩意。感觉有些无从下手，在前面做报表时，总想找第三方的控件来用用，结果始终不行没搞定、没研究透，催得急没办法还是的动手自己写个，哈...查了些相关的资料，感觉也不难，没多久就搞定了。主要用到PrintDocument和PrintPreviewDialog两个对象，一个用来打印，一个用来阅览，如果在设置模板OK后，若果人流量比较多的话就直接打印不必在阅览，这样会快好多。

private void button2_Click(object sender, EventArgs e)

 

{

 

    //打印预览            



    PrintPreviewDialog ppd = new PrintPreviewDialog();

 

    PrintDocument pd = new PrintDocument();

 

    



    //设置边距

 

    Margins margin = new Margins(20, 20, 20, 20);

 

    pd.DefaultPageSettings.Margins = margin;

 

    



    ////纸张设置默认

 

    PaperSize pageSize = new PaperSize("First custom size", getYc(58), 600);

 

    pd.DefaultPageSettings.PaperSize = pageSize;

 

    



    //打印事件设置            



    pd.PrintPage += new PrintPageEventHandler(this.pd_PrintPage);

 

    ppd.Document = pd;

 

    ppd.ShowDialog();

 

    



    try

 

    {

 

        pd.Print();

 

    }

 

    catch (Exception ex)

 

    {

 

        MessageBox.Show(ex.Message, "打印出错", MessageBoxButtons.OK, MessageBoxIcon.Error);

 

        pd.PrintController.OnEndPrint(pd, new PrintEventArgs());

 

    }

 

}

View Code

这里的代码主要是获取需要打印的内容，在实际运用中这里要改成动态的

private int getYc(double cm) 



{

 

    return (int)(cm / 25.4) * 100;

 

}

 

 

 

public string GetPrintStr() 



{

 

    StringBuilder sb = new StringBuilder(); 



 

 

    string tou = "伊尹餐饮公司";

 

    string address = "深圳市罗湖区东门老街29号";

 

    string saleID = "2010930233330";

 

    string item = "项目";

 

    decimal price = 25.00M;

 

    int count = 5;

 

    decimal total = 0.00M;

 

    decimal fukuan = 500.00M;

 

    



    sb.Append("            " + tou + "     /n");

 

    sb.Append("-----------------------------------------------------------------/n");

 

    sb.Append("日期:" + DateTime.Now.ToShortDateString() + "  " + "单号:" + saleID + "/n");

 

    sb.Append("-----------------------------------------------------------------/n");

 

    sb.Append("项目" + "/t/t" + "数量" + "/t" + "单价" + "/t" + "小计" + "/n");

 

    for (int i = 0; i < count; i++)

 

    {

 

        decimal xiaoji = (i+1) * price;               



        sb.Append(item + (i+1) + "/t/t" + (i+1) + "/t" + price + "/t" + xiaoji);

 

        total += xiaoji;

 

 

 

        if (i != (count))

 

            sb.Append("/n");

 

    }

 

 

 

    sb.Append("-----------------------------------------------------------------/n");

 

    sb.Append("数量: " + count + " 合计:   " + total+"/n");

 

    sb.Append("付款: 现金" + "    " + fukuan);

 

    sb.Append("         现金找零:" + "   " + (fukuan - total) + "/n");

 

    sb.Append("-----------------------------------------------------------------/n");

 

    sb.Append("地址：" + address + "/n");

 

    sb.Append("电话：123456789   123456789/n");

 

   



    sb.Append("                 谢谢惠顾欢迎下次光临                    ");

 

    return sb.ToString();

 

}

View Code

打印效果如下：