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//打印命令开始
StringBuilder builder = new StringBuilder();
builder.AppendLine("^XA");
builder.AppendLine("^MD30");
builder.AppendLine("^LH60,10");
builder.AppendLine("^FO20,10");
builder.AppendLine("^ACN,18,10");
builder.AppendLine("^BY1.4,3,50");
builder.AppendLine("^BCN,,Y,N");
builder.AppendLine("^FD01008D004Q-0^FS");
builder.AppendLine("^XZ");
System.IO.Ports.SerialPort sPort = new System.IO.Ports.SerialPort();
//sPort.BaudRate = 57600;
sPort.BaudRate = 115200;
sPort.PortName = "COM3";
// sPort.PortName = "COM7";
sPort.Parity = 0;
sPort.DataBits = 8;
if (sPort.IsOpen)
{
sPort.Close();
}
sPort.Open();
sPort.Encoding = System.Text.ASCIIEncoding.Default;
sPort.Write(builder.ToString());
sPort.Dispose();
sPort.Close();