C#教程之基于C#实现与新大陆扫码枪通信

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  • C#教程之基于C#实现与新大陆扫码枪通信

  • 2019-06-28 22:12 来源:未知

随着工业互联的发展,扫码枪在很多场合都有所应用,超市、商场以及一些智能工厂。今天主要讲如何通过C#实现与新大陆扫码枪(OY10)进行通信,对于扫码枪的配置,这里就不多说了,结合说明书就可以实现。这里值得注意的是,如果安装驱动后,电脑设备管理器中看不到COM口,可能需要扫一个条形码来设置一下,具体参考说明书通讯配置章节。

   首先贴下界面,基于Winform开发,主要就是正常的串口通信,涉及的技术包括UI界面设计+串口通信知识+参数配置处理+委托更新界面,涵盖了一个小系统必备的一些知识。

    

 

    再来贴一些源码,首先贴个核心串口类的编写:

 

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  1 using System;
  2 using System。Collections。Generic;
  3 using System.IO.Ports;
  4 using System。Linq;
  5 using System。Text;
  6 using System.Threading.Tasks;
  7 
  8 namespace NewLand
  9 {
 10     public delegate void ShowMsgDelegate(string info);
 11 
 12     public class NewLandSerial
 13     {
 14 
 15         //定义串口类对象
 16         private SerialPort MyCom;
 17         //定义接收字节数组
 18         byte[] bData = new byte[1024];
 19         byte mReceiveByte;
 20         int mReceiveByteCount = 0;
 21         public ShowMsgDelegate myShowInfo;
 22 
 23         public NewLandSerial()
 24         {
 25             MyCom = new SerialPort();
 26 
 27         }
 28 
 29         #region 打开关闭串口方法
 30         /// <summary>
 31         /// 打开串口方法【9600 N 8 1】
 32         /// </summary>
 33         /// <param name="iBaudRate">波特率</param>
 34         /// <param name="iPortNo">端口号</param>
 35         /// <param name="iDataBits">数据位</param>
 36         /// <param name="iParity">校验位</param>
 37         /// <param name="iStopBits">停止位</param>
 38         /// <returns></returns>
 39         public bool OpenMyComm(int iBaudRate, string iPortNo, int iDataBits, Parity iParity, StopBits iStopBits)
 40         {
 41             try
 42             {
 43                 //关闭已打开串口
 44                 if (MyCom.IsOpen)
 45                 {
 46                     MyCom.Close();
 47                 }
 48                 //设置串口属性
 49                 MyCom.BaudRate = iBaudRate;
 50                 MyCom.PortName = iPortNo;
 51                 MyCom.DataBits = iDataBits;
 52                 MyCom.Parity = iParity;
 53                 MyCom.StopBits = iStopBits;
 54                 MyCom.ReceivedBytesThreshold = 1;
 55                 MyCom.DataReceived += MyCom_DataReceived;
 56 
 57                 MyCom.Open();
 58                 return true;
 59             }
 60             catch
 61             {
 62                 return false;
 63             }
 64         }
 65 
 66         private void MyCom_DataReceived(object sender, SerialDataReceivedEventArgs e)
 67         {
 68             mReceiveByteCount = 0;
 69             while (MyCom.BytesToRead > 0)
 70             {
 71                 mReceiveByte = (byte)MyCom。ReadByte();
 72                 bData[mReceiveByteCount] = mReceiveByte;
 73                 mReceiveByteCount += 1;
 74                 if (mReceiveByteCount >= 1024)
 75                 {
 76                     mReceiveByteCount = 0;
 77                     //清除输入缓存区
 78                     MyCom.DiscardInBuffer();
 79                     return;
 80                 }
 81             }
 82             if (mReceiveByteCount > 0)
 83             {
 84                 myShowInfo(Encoding.ASCII.GetString(GetByteArray(bData, 0, mReceiveByteCount)));
 85             }
 86 
 87         }
 88 
 89         /// <summary>
 90         /// 自定义截取字节数组
 91         /// </summary>
 92         /// <param name="byteArr"></param>
 93         /// <param name="start"></param>
 94         /// <param name="length"></param>
 95         /// <returns></returns>
 96         private byte[] GetByteArray(byte[] byteArr, int start, int length)
 97         {
 98             byte[] Res = new byte[length];
 99             if (byteArr != null && byteArr.Length >= length)
100             {
101                 for (int i = 0; i < length; i++)
102                 {
103                     Res[i] = byteArr[i + start];
104                 }
105 
106             }
107             return Res;
108         }
109 
110 
111         /// <summary>
112         /// 关闭串口方法
113         /// </summary>
114         /// <returns></returns>
115         public bool ClosePort()
116         {
117             if (MyCom。IsOpen)
118             {
119                 MyCom。Close();
120                 return true;
121             }
122             else
123             {
124                 return false;
125             }
126 
127         }
128         #endregion
129 
130     }
131 }
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    再者就是界面的调用,直接看代码:

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 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Configuration;
 5 using System.Data;
 6 using System.Drawing;
 7 using System。IO。Ports;
 8 using System。Linq;
 9 using System。Text;
10 using System。Threading。Tasks;
11 using System。Windows。Forms;
12 
13 namespace NewLand
14 {
15     public partial class FrmMain : Form
16     {
17         public FrmMain()
18         {
19             InitializeComponent();
20             this.Load += FrmMain_Load;
21 
22         }
23 
24         private void FrmMain_Load(object sender, EventArgs e)
25         {
26             this.btn_DisConn.Enabled = false;
27         }
28 
29         private void txt_Info_DoubleClick(object sender, EventArgs e)
30         {
31             this。txt_Info。Clear();
32         }
33 
34         NewLandSerial myNewLand;
35 
36 
37         private void btn_Connect_Click(object sender, EventArgs e)
38         {
39            string Port= ConfigurationManager.AppSettings["Port"]。ToString();
40 
41             myNewLand = new NewLandSerial();
42             myNewLand.myShowInfo += ShowInfo;
43 
44             if (myNewLand.OpenMyComm(9600, Port, 8, Parity.None, StopBits.One))
45             {
46                 MessageBox.Show("连接成功!", "建立连接");
47                 this.btn_Connect.Enabled = false;
48                 this.btn_DisConn.Enabled = true;
49             }
50             else
51             {
52                 MessageBox.Show("连接失败!", "建立连接");
53             }
54         }
55 
56         private void ShowInfo(string info)
57         {
58             Invoke(new Action(() =>
59             {
60                 this.txt_Info.AppendText(DateTime.Now.ToString("yyyy/MM/dd HH:mm:ss") + "   " + info + Environment.NewLine);
61             }));
62         }
63 
64         private void btn_DisConn_Click(object sender, EventArgs e)
65         {
66             if (myNewLand.ClosePort())
67             {
68                 MessageBox.Show("断开连接成功!", "断开连接");
69                 this.btn_Connect.Enabled = true;
70                 this.btn_DisConn.Enabled = false;
71             }
72             else
73             {
74                 MessageBox.Show("断开连接失败!", "断开连接");
75             }
76         }
77 
78         private void btn_ParaSet_Click(object sender, EventArgs e)
79         {
80             new FrmParaSet()。ShowDialog();
81         }
82     }
83 }
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    最后是参数配置,通过App.Config实现:

复制代码
 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Configuration;
 5 using System.Data;
 6 using System.Drawing;
 7 using System.Linq;
 8 using System.Text;
 9 using System.Threading.Tasks;
10 using System。Windows。Forms;
11 
12 namespace NewLand
13 {
14     public partial class FrmParaSet : Form
15     {
16         public FrmParaSet()
17         {
18             InitializeComponent();
19             this.Load += FrmParaSet_Load;
20         }
21 
22         private void FrmParaSet_Load(object sender, EventArgs e)
23         {
24             for (int i = 0; i < 20; i++)
25             {
26                 this.cmb_Port.Items.Add("COM" + i.ToString());
27             }
28 
29             this.cmb_Port.Text = ConfigurationManager.AppSettings["Port"].ToString();
30         }
31 
32         private void btn_Set_Click(object sender, EventArgs e)
33         {
34             Configuration cfa = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); //首先打开配置文件
35             cfa.AppSettings.Settings["Port"].Value = this.cmb_Port.Text;
36             cfa.Save();  //保存配置文件
37             ConfigurationManager.RefreshSection("appSettings");  //刷新配置文件
38             this.Close();
39         }
40     }
41 }
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