C# print pos winform

先将pos机设置为默认

 控制面板->打印机和传真->右键->服务器属性

首先创建 ClassPrint 对象

using System;
using System.Drawing;
using System.Drawing.Printing;
using System.IO;
using System.Text;

namespace PrintWinform
{
    class ClassPrint
    {
        //定义一个字符串流，用来接收所要打印的数据
        private static StringReader sr;
        //str要打印的数据
        public static bool Print(StringBuilder str)
        {
            bool result = true;
            try
            {
                sr = new StringReader(str.ToString());
                PrintDocument pd = new PrintDocument();
                pd.PrintController = new System.Drawing.Printing.StandardPrintController();
                //pd.DefaultPageSettings.Margins.Top = 2;
                //pd.DefaultPageSettings.Margins.Left = 0;
                //pd.DefaultPageSettings.PaperSize.Width = 320;
                pd.DefaultPageSettings.Margins = new Margins(20, 20, 20, 20);
                
                //pd.DefaultPageSettings.PaperSize.Height = 5150;
                pd.PrinterSettings.PrinterName = pd.DefaultPageSettings.PrinterSettings.PrinterName;//默认打印机
                pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);
                pd.Print();
            }
            catch (Exception ex)
            {
                result = false;
            }
            finally
            {
                if (sr != null)
                    sr.Close();
            }
            return result;
        }

        private static void pd_PrintPage(object sender, PrintPageEventArgs ev)
        {
            Font printFont = new Font("Arial", 9);//打印字体
            float linesPerPage = 0;
            float yPos = 0;
            int count = 0;
            float leftMargin = ev.MarginBounds.Left;
            float topMargin = ev.MarginBounds.Top;
            String line = string.Empty;
            linesPerPage = ev.MarginBounds.Height / printFont.GetHeight(ev.Graphics);
            while (count < linesPerPage && ((line = sr.ReadLine()) != null))
            {
                yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));
                ev.Graphics.DrawString(line, printFont, Brushes.Black,
                   leftMargin, yPos, new StringFormat());
                count++;
            }
            // If more lines exist, print another page.
            if (line != null)
                ev.HasMorePages = true;
            else
                ev.HasMorePages = false;
        }
    }
}

然后UI form

    private void button1_Click(object sender, EventArgs e)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("                心理测评一体机                
");
            sb.Append("              职业倾向人格临床量表             
");
            sb.Append("***********************************************
");
            sb.Append("E量表得分为：32分，您的性格内向
");
            sb.Append("N量表得分为：28分，您的情绪稳定性高
");
            sb.Append("P量表得分为：56分，您的倔强性一般
");
            sb.Append("L量表得分为：51分，您的掩饰性一般。
");
            sb.Append("***********************************************
");
            sb.Append("                       北京XXXX科技有限公司
");
            sb.Append("   测评结果仅供参考，最终结果请以心理咨询师为准
");
            ClassPrint.Print(sb);
        }