ZPL并口打印

1. 1. 
      
2. using  System;   
3. using  System.Collections.Generic;   
4. using  System.Text;   
5. using  System.Runtime.InteropServices;   
6. 
   
7. namespace  Barcode_Print   
8. {
9.   /// <summary>
10.   /// 本类使用说明：
11.   /// 将一行ZPL指令作为string参数传给write函数即可
12.   /// </summary>
13.   class LPTControl
14.   {
15.       [StructLayout(LayoutKind.Sequential)]
16.       private struct OVERLAPPED
17.       {
18.           int Internal;
19.           int InternalHigh;
20.           int Offset;
21.           int OffSetHigh;
22.           int hEvent;
23.       }
24. 
    
25.       [DllImport("kernel32.dll")]
26.       private static extern int CreateFile(
27.       string lpFileName,
28.       uint dwDesiredAccess,
29.       int dwShareMode,
30.       int lpSecurityAttributes,
31.       int dwCreationDisposition,
32.       int dwFlagsAndAttributes,
33.       int hTemplateFile
34.       );
35. 
    
36. 
    
37.       [DllImport("kernel32.dll")]
38.       private static extern bool WriteFile(
39.       int hFile,
40.       byte[] lpBuffer,
41.       int nNumberOfBytesToWrite,
42.       out   int lpNumberOfBytesWritten,
43.       out   OVERLAPPED lpOverlapped
44.       );
45. 
    
46. 
    
47.       [DllImport("kernel32.dll")]
48.       private static extern bool CloseHandle(
49.       int hObject
50.       );
51. 
    
52. 
    
53. 
    
54.       private int iHandle;
55.       public bool Open()
56.       {
57.           iHandle = CreateFile("lpt1", 0x40000000, 0, 0, 3, 0, 0);
58.           if (iHandle != -1)
59.           {
60.               return true;
61.           }
62.           else
63.           {
64.               return false;
65.           }
66. 
    
67.       }
68. 
    
69. 
    
70.       public bool Write(String Mystring)
71.       {
72. 
    
73. 
    
74.           if (iHandle != -1)
75.           {
76.               int i;
77.               OVERLAPPED x;
78.               byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);
79.               return WriteFile(iHandle, mybyte, mybyte.Length, out   i, out   x);
80.           }
81.           else
82.           {
83.               throw new Exception("端口未打开!");
84.           }
85.       }
86. 
    
87. 
    
88.       public bool Close()
89.       {
90.           return CloseHandle(iHandle);
91.       }
92.   }
93. 
    
94. }  
95. 
    
96.       [DllImport("kernel32.dll")]
97.       private static extern int CreateFile(
98.       string lpFileName,
99.       uint dwDesiredAccess,
100.       int dwShareMode,
101.       int lpSecurityAttributes,
102.       int dwCreationDisposition,
103.       int dwFlagsAndAttributes,
104.       int hTemplateFile
105.       );
106. 
     
107. 
     
108.       [DllImport("kernel32.dll")]
109.       private static extern bool WriteFile(
110.       int hFile,
111.       byte[] lpBuffer,
112.       int nNumberOfBytesToWrite,
113.       out   int lpNumberOfBytesWritten,
114.       out   OVERLAPPED lpOverlapped
115.       );
116. 
     
117. 
     
118.       [DllImport("kernel32.dll")]
119.       private static extern bool CloseHandle(
120.       int hObject
121.       );
122. 
     
123. 
     
124. 
     
125.       private int iHandle;
126.       public bool Open()
127.       {
128.           iHandle = CreateFile("lpt1", 0x40000000, 0, 0, 3, 0, 0);
129.           if (iHandle != -1)
130.           {
131.               return true;
132.           }
133.           else
134.           {
135.               return false;
136.           }
137. 
     
138.       }
139. 
     
140. 
     
141.       public bool Write(String Mystring)
142.       {
143. 
     
144. 
     
145.           if (iHandle != -1)
146.           {
147.               int i;
148.               OVERLAPPED x;
149.               byte[] mybyte = System.Text.Encoding.Default.GetBytes(Mystring);
150.               return WriteFile(iHandle, mybyte, mybyte.Length, out   i, out   x);
151.           }
152.           else
153.           {
154.               throw new Exception("端口未打开!");
155.           }
156.       }
157. 
     
158. 
     
159.       public bool Close()
160.       {
161.           return CloseHandle(iHandle);
162.       }
163.   }
164. 
     
165. }  
166. 暂时无法判断打印机状态，如缺纸，打印机未开。
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