C# 怎样实现条码标签的批量打印

Question

现在的情况是可以打印一个条码标签调用，PrintDocument.print
如果我要批量实现条码标签的打印，应该怎么写? 
代码如下： private void button1_Click(object sender, EventArgs e)     //按钮事件
        {            strCon = "server=192.168.1.57;uid=sa;pwd=123;database=LonkingJiXie";
            SqlConnection sqlCon = new SqlConnection();
            sqlCon.ConnectionString = strCon;
            sqlCon.Open();
            SqlCommand sqlCom = new SqlCommand("select   * from TestTM", sqlCon);            SqlDataReader sqlDR = sqlCom.ExecuteReader();
            bool ifcom = sqlDR.Read();
            if (ifcom)
            {
                WLcode = sqlDR[0].ToString();
                WLname = sqlDR[1].ToString();
                TMcode = sqlDR[2].ToString();
            }                        PrintPreviewDialog ppwDlg = new PrintPreviewDialog();            PrintDocument prtDoc = new PrintDocument();            ppwDlg.Document = prtDoc;            prtDoc.PrintPage += new PrintPageEventHandler(prtDoc_PrintPage);            if (ppwDlg.ShowDialog() != DialogResult.OK)
            {
                prtDoc.PrintPage -= new PrintPageEventHandler(prtDoc_PrintPage);
                return;
            }
        }----------------------document.pintpage事件
  //printdocument.printpage 事件            Graphics g = e.Graphics;            e.Graphics.Clip = new Region(new Rectangle(10, 2, 800, 200));            g.PageUnit = GraphicsUnit.Millimeter;            Font drawFont = new Font("宋体", 14);
            Font drawLGFont = new Font("方正艺黑简体", 8);
            SolidBrush drawBrush = new SolidBrush(Color.Black);            g.DrawString("Lonking 龙工", drawLGFont, drawBrush, 10, 5);
            SizeF FZ = g.MeasureString("Lonking 龙工", drawFont, e.MarginBounds.Width);            g.DrawString(WLname + ":", drawFont, drawBrush, 10, 5 + FZ.Height);
            SizeF dd = g.MeasureString(WLname + ":", drawFont, e.MarginBounds.Width);            g.DrawString(WLcode, drawFont, drawBrush, 10 + dd.Width, 5 + dd.Height);
            Pen penLine = new Pen(new SolidBrush(Color.Black), 0.2f);            //g.DrawLine(penLine, 10, 10, 190, 10);
            //g.DrawLine(penLine, new PointF(20.0f, Convert.ToSingle(20.0f + dd.Height)), new PointF(Convert.ToSingle(20.0f + 2 * dd.Width), Convert.ToSingle(20.0f + dd.Height)));
            //g.DrawRectangle(penLine, 10,10, 190, 50);   //左，上，右，下   坐标，高、宽
            Code39 _Code39 = new Code39();
            _Code39.Height = 60;
            _Code39.Magnify = 1;
            _Code39.ViewFont = new Font("宋体", 10);            System.Drawing.Image _CodeImage = _Code39.GetCodeImage(TMcode, Code39.Code39Model.Code39Normal, true);            g.DrawImage(_CodeImage, 5, 10 + FZ.Height);

Answer 1

把打印的那段代码加到：
while(sqlDR.read())
{
    //打印代码，注意要调整每一个code39标签的位置。
}

Answer 2

这样写没反应，打印预览时，还是只有一个标签
            bool ifcom = sqlDR.Read();
            if (ifcom)
            {
                TMcode = sqlDR[2].ToString();
               
                Code39 _Code39 = new Code39();
                _Code39.Height = 60;
                _Code39.Magnify = 1;
                _Code39.ViewFont = new Font("宋体", 20);
                //123ABC4567890FWF
                System.Drawing.Image _CodeImage = _Code39.GetCodeImage(TMcode, Code39.Code39Model.Code39Normal, false);
                //pictureBox1.Image = _CodeImage;
                System.IO.MemoryStream _Stream = new System.IO.MemoryStream();
                _CodeImage.Save(_Stream, System.Drawing.Imaging.ImageFormat.Jpeg);                StartPrint(_Stream, "image"); //调用打印图片
            
            }
                                    sqlCom.Dispose();
            sqlCon.Close();

Answer 3

----------------------document.pintpage事件
  //printdocument.printpage 事件  Graphics g = e.Graphics;  e.Graphics.Clip = new Region(new Rectangle(10, 2, 800, 200));  g.PageUnit = GraphicsUnit.Millimeter;  Font drawFont = new Font("宋体", 14);
  Font drawLGFont = new Font("方正艺黑简体", 8);
  SolidBrush drawBrush = new SolidBrush(Color.Black);  g.DrawString("Lonking 龙工", drawLGFont, drawBrush, 10, 5);
  SizeF FZ = g.MeasureString("Lonking 龙工", drawFont, e.MarginBounds.Width);  g.DrawString(WLname + ":", drawFont, drawBrush, 10, 5 + FZ.Height);
  SizeF dd = g.MeasureString(WLname + ":", drawFont, e.MarginBounds.Width);  g.DrawString(WLcode, drawFont, drawBrush, 10 + dd.Width, 5 + dd.Height);
  Pen penLine = new Pen(new SolidBrush(Color.Black), 0.2f);  //g.DrawLine(penLine, 10, 10, 190, 10);
  //g.DrawLine(penLine, new PointF(20.0f, Convert.ToSingle(20.0f + dd.Height)), new PointF(Convert.ToSingle(20.0f + 2 * dd.Width), Convert.ToSingle(20.0f + dd.Height)));
  //g.DrawRectangle(penLine, 10,10, 190, 50); //左，上，右，下 坐标，高、宽
int i = 1;
 while(sqlDR.read())
{
    Code39 _Code39 = new Code39();
  _Code39.Height = 60;
  _Code39.Magnify = 1;
  _Code39.ViewFont = new Font("宋体", 10);  System.Drawing.Image _CodeImage = _Code39.GetCodeImage(TMcode, Code39.Code39Model.Code39Normal, true);  g.DrawImage(_CodeImage, 5, 10 + 60 * i);
i++;
}