C#实现EPL II格式打印与打印测试

一、EPL II 格式及打印测试

注意N命令前的换行和最后P1后的换行。将此段代码复制到windows记事本里另存为Print.ext，文件名随便，后缀为ext。然后通过cmd控制命令行输入"copy c:\print.ext COM1”。然后就可以看到打印机开始打印了，效果不错。

N
B300,5,0,1,2,3,40,N,"1234567891123"
A160,55,0,8,1,1,N,"ALP-122244444444"
b420,100,Q,"DATAdfdgdfgdf"
P1

• 说明书上说N命令开始前要先输入一行空白行，
  原文：Always send a Line Feed (LF) prior to the N command to ensure that previous data in the command buffer has cleared and the printer is in i tial ized and ready to ac cept com mands.

• P命令之后也要加一个空白行，即回车，不然最后的P命令要打印的东西是不打印的，之前的P命令由于有后面的命令，间接等于换行了，所以会照打不误。

• 说明书上写P命令是Pp1, [p2]，其参数p1是Number of label sets，而参数p2是Number of copies of each label (used in combination with counters to print multiple copies of the same label).
  但我试验下来p1就是要打印的条码的重复次数，而p2无论我怎么改写都没有变换，始终打印最后一个条码。应该是我哪里写错了。但是多用几次P1，每次打一条还是可以起到同样的打印多条条码的效果的。

下面，给出我打印的条码的例子：

N
B60,5,0,1,2,3,40,N,"1234567891123"
A60,55,0,8,1,1,N,"ALP-1"
P1
B60,5,0,1,2,3,40,N,"1234567890123"
A60,55,0,8,1,1,N,"ALP-2"
P1
B60,5,0,1,2,3,40,N,"1234567890123"
A60,55,0,8,1,1,N,"ALP-3"
P1

发送到打印机测试：

NET USE LPT1 /DELETE
NET USE LPT1 \\192.168.2.166\zetl /persistent:yes
copy c:\1.txt lpt1
copy c:\1.txt \\192.168.2.167\zetl

二、使用API发送内容进行打印：

private void button1_Click_1(object sender, EventArgs e)
{
   string txt = textBox1.Text;
   LPTControl lpt = new LPTControl();
   //string cmd = System.IO.File.ReadAllText("zplII.txt");//zplII.txt里写了条码机的命令

string cmd = Environment.NewLine + "N" + Environment.NewLine
   + "B60,5,0,1,2,3,40,N,\"1234567891123\"" + Environment.NewLine + "A60,55,0,8,1,1,N,\"ALP-5\"" + Environment.NewLine + "P1" + Environment.NewLine
   + "B60,5,0,1,2,3,40,N,\"1234567891123\"" + Environment.NewLine + "A60,55,0,8,1,1,N,\"ALP-6\"" + Environment.NewLine + "P1" + Environment.NewLine
   + "B60,5,0,1,2,3,40,N,\"1234567891123\"" + Environment.NewLine + "A60,55,0,8,1,1,N,\"ALP-7\"" + Environment.NewLine + "P1" + Environment.NewLine;

if (!lpt.Open())
   {
       throw new Exception("未能连接打印机，请确认打印机是否安装正确并接通电源。");
   }
   lpt.Write(cmd);
   if (!lpt.Close())
   {
       if (!lpt.Open())
       {
           throw new Exception("未能连接打印机，请确认打印机是否安装正确并接通电源。");
       }
   }
}

public class LPTControl
{
   [StructLayout(LayoutKind.Sequential)]
   private struct OVERLAPPED
   {
       int Internal;
       int InternalHigh;
       int Offset;
       int OffSetHigh;
       int hEvent;
   }
   [DllImport("kernel32.dll")]
   private static extern int CreateFile(
   string lpFileName,
   uint dwDesiredAccess,
   int dwShareMode,
   int lpSecurityAttributes,
   int dwCreationDisposition,
   int dwFlagsAndAttributes,
   int hTemplateFile
   );

[DllImport("kernel32.dll")]
   private static extern bool WriteFile(
   int hFile,
   byte[] lpBuffer,
   int nNumberOfBytesToWrite,
   out int lpNumberOfBytesWritten,
   out OVERLAPPED lpOverlapped
   );

[DllImport("kernel32.dll")]
   private static extern bool CloseHandle(
   int hObject
   );

private int iHandle;

public bool Open()
   {
       iHandle = CreateFile("lpt1:", 0x40000000, 0, 0, 3, 0, 0);
       if (iHandle != -1)
       {
           return true;
       }
       else
       {
           return false;
       }
   }

public bool Write(String Mystring)
   {

if (iHandle != -1)
       {
           int i;
           OVERLAPPED x;
           byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);
           return WriteFile(iHandle, mybyte, mybyte.Length, out i, out x);
       }
       else
       {
           throw new Exception("端口未打开!");
       }
   }

public bool Close()
   {
       return CloseHandle(iHandle);
   }
}

来源：https://www.cnblogs.com/springsnow/p/11394587.html