using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Printing;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        string passWord = "1234";
        string fullnumber = "9999";
        System.Drawing.Printing.PrintDocument pdBays = new System.Drawing.Printing.PrintDocument();
        public Form1()
        {
            InitializeComponent();
            pdBays.PrintPage += new PrintPageEventHandler(pbay_PrintPage);
            pdBays.DefaultPageSettings.PaperSize = new PaperSize("",600, 800);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            for (int i = 0; i <= 0; i++)
            {
                pdBays.Print();
            }
        }

        public void pbay_PrintPage(object sender, PrintPageEventArgs ev)
        {
            Graphics dc = ev.Graphics;

            Pen pen = new Pen(Color.Black, 1);
            Font drawFont = new Font("仿宋_GB2312", 12);
            SolidBrush drawBrush = new SolidBrush(Color.Black);
            PointF drawPoint = new PointF(30, 200);

            //这句可以隐藏“正在打印”窗体
            pdBays.PrintController = new System.Drawing.Printing.StandardPrintController();

            dc.DrawString("\n密码：" + passWord + "\n充值券编号：" + fullnumber, drawFont, drawBrush, drawPoint);
        }

        ////网上例子
        //private void btnPrint_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", 800, 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)
        //    {
        //    }
        //}
    }
}

------解决方案--------------------
打印完了你总知道吧，再打几个空行，再切

------解决方案--------------------

我之前写过 小票的打印，
直接是写文本文件的方式，只不是写的对象是打印机的端口，

希望对你的帮助：

C# code



        #region Print_CashResult
        public static void Print_CashResult(DataTable dt)
        {
            SafeFileHandle sfh = null;
            string instruction = null;
            IntPtr ptr = CreateFile(PrintPort, FileAccess.Write, FileShare.Write, 0, FileMode.Open, 0, IntPtr.Zero);
            if (ptr.ToInt32() == -1)
            {
                MessageBox.Show(string.Format("连接打印机：{0} 失败，请检查连接端口是否正确。", PrintPort ));
                return;
            }

            sfh = new SafeFileHandle(ptr, true);
            StreamWriter sw = new StreamWriter( new FileStream( sfh, FileAccess.Write), System.Text.Encoding.Default);

            StringBuilder sb = new StringBuilder();
            DataRow dr = dt.Rows[0];    //一次充值只有1行

            sb.AppendLine(string.Format("单据编号:{0}",dr["BillNo"]));
            sb.AppendLine(string.Format("{0,-15}{1,23}",ClubName + "(客户联)","充值"));
            sb.AppendLine("===================