public void PrintESC(int type)
{
System.IntPtr lhPrinter = new System.IntPtr();
DOCINFO di = new DOCINFO();
int pcWritten = 0;
di.pDocName = "进退纸Document";
di.pDataType = "RAW";
try
{
PrintDirect.OpenPrinter(this.PrintPort, ref lhPrinter, 0);
if (lhPrinter == IntPtr.Zero)
{
return;
}
PrintDirect.StartDocPrinter(lhPrinter, 1, ref di);
PrintDirect.StartPagePrinter(lhPrinter);
string send = string.Empty;
for (int j = 0; j < 3; j++)
{
switch (type)
{
case 0:
send = "" + (char)(27) + (char)(64) + (char)(27) + 'j' + (char)(180); //退纸
break;
case 1:
send = "" + (char)(27) + (char)(64) + (char)(27) + 'J' + (char)(180); //进纸
break;
case 2:
send = "" + (char)(27) + (char)(64) + (char)(12); //换行（未测试）
break;
default:
send = "" + (char)(27) + (char)(64) + (char)(12); //换行（未测试）
break;
}
byte[] buf = new byte[80];
for (int i = 0; i < send.Length; i++)
{
buf[i] = (byte)send[i];
}
PrintDirect.WritePrinter(lhPrinter, send, send.Length, ref pcWritten);
}
}
catch (Exception e)
{
System.Windows.MessageBox.Show(e.Message);
}
finally
{
if (lhPrinter != IntPtr.Zero)
{
PrintDirect.EndPagePrinter(lhPrinter);
PrintDirect.EndDocPrinter(lhPrinter);
PrintDirect.ClosePrinter(lhPrinter);
}
}
}
public static extern long StartDocPrinter(IntPtr hPrinter, int Level, ref DOCINFO pDocInfo);