C#直接打印技术：无须驱动，CMD调用

try
            {
                StreamReader sr = new StreamReader("123.txt");
                string txt = sr.ReadToEnd();
                txt = txt.Replace("%SN%", textBox1.Text);
                string d = "C:\\temp.txt";
                if (File.Exists(d)) File.Delete(d);
                StreamWriter sw = File.AppendText(d);
                sw.Write(txt);
                sw.Flush();
                sw.Close();
                Process cmd = new Process();
                cmd.StartInfo.FileName = "cmd.exe";
                cmd.StartInfo.UseShellExecute = false;
                cmd.StartInfo.RedirectStandardInput = true;
                cmd.StartInfo.RedirectStandardOutput = true;
                cmd.StartInfo.RedirectStandardError = true;
                cmd.StartInfo.CreateNoWindow = true;
                cmd.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
                cmd.Start();
                cmd.StandardInput.WriteLine("print  C:\\temp.txt");
                cmd.StandardInput.WriteLine("exit");
                cmd.WaitForExit();
                cmd.Close();

            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message, "´íÎó", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;