打印代码 ，中间是小票的格式 path自己定义一个路径，有些变量你可以根据需要设置
方法和打印事件外面声明
代码
// 小票打印 StreamWriter sw = new StreamWriter(path, true); strRiqi = DateTime.Now.ToString("yyyyMMdd"); strShijian = DateTime.Now.ToString("HHmmss"); sw.Write(" 冲正凭证\t\t"); sw.WriteLine(" \t"); sw.WriteLine(" \t"); sw.Write("卡号 \t"); sw.WriteLine(strKaID); sw.Write("卡类型 \t"); sw.WriteLine(strKaLeixing); sw.Write("卡有效期 \t"); sw.WriteLine(strKaYouxiaoqi); sw.Write("网点编号 \t"); sw.WriteLine(strWangdianBianhao); sw.Write("冲正前金额 \t"); sw.WriteLine(strChongzhiqianJine); sw.Write("冲正金额 \t"); sw.WriteLine(strChongzhiJine); sw.Write("冲正后金额 \t"); sw.WriteLine(strChongzhiHouJine); sw.Write("日期 \t"); sw.WriteLine(strRiqi); sw.Write("时间 \t"); sw.WriteLine(strShijian); sw.Write("操作员 \t"); sw.WriteLine(ShareMemory.StrBianhao); sw.Write("客服电话 \t"); sw.WriteLine(strKefuDianhua); sw.WriteLine(" "); sw.Write("XXXX科技有限公司"); sw.Close(); //创建一个PrintDocument的实例 System.Drawing.Printing.PrintDocument docToPrint = new System.Drawing.Printing.PrintDocument(); System.IO.Stream streamToPrint; string streamType = "txt"; //打印按钮里面 streamToPrint = new FileStream(path, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None); // 创建一个PrintDialog的实例。 System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog(); PrintDialog1.AllowSomePages = true; PrintDialog1.ShowHelp = true; // 把PrintDialog的Document属性设为上面配置好的PrintDocument的实例 PrintDialog1.Document = docToPrint; this.docToPrint.PrintPage += new PrintPageEventHandler(docToPrint_PrintPage); // 调用PrintDialog的ShowDialog函数显示打印对话框 DialogResult result = PrintDialog1.ShowDialog(); if (result == DialogResult.OK) { // 开始打印 docToPrint.Print(); } //设置打印机开始打印的事件处理函数 private void docToPrint_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e) { switch (this.streamType) { case "txt": string text = null; // 信息头 string strTou = string.Empty; System.Drawing.Font printFont = new System.Drawing.Font ("Arial", 8, System.Drawing.FontStyle.Regular); System.Drawing.Font printFont1 = new System.Drawing.Font ("Arial", 11, System.Drawing.FontStyle.Regular); System.IO.StreamReader streamReader = new StreamReader(this.streamToPrint); text = streamReader.ReadToEnd(); // 获取信息头 strTou = text.Substring(0, 20); //信息其他部分 text = text.Substring(20, (text.Length - 20)); // 设置信息打印格式 e.Graphics.DrawString(strTou, printFont1, System.Drawing.Brushes.Black, 5, 5); e.Graphics.DrawString(text, printFont, System.Drawing.Brushes.Black, 10, 5); break; case "image": System.Drawing.Image image = System.Drawing.Image.FromStream(this.streamToPrint); int x = e.MarginBounds.X; int y = e.MarginBounds.Y; int width = image.Width; int height = image.Height; if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height)) { width = e.MarginBounds.Width; height = image.Height * e.MarginBounds.Width / image.Width; } else { height = e.MarginBounds.Height; width = image.Width * e.MarginBounds.Height / image.Height; } System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(x, y, width, height); e.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel); break; default: break; } }
来源：https://www.cnblogs.com/jayleke/archive/2010/07/08/1773357.html