C#编程之串口（二）

这一章继续讲解一下串口部分设计。

我们知道串口通常情况下有两个重要的参数需要设定，分别是串口号和波特率。

串口号，用来进行数据流传送，波特率用来设定数据流传送速度。这里我们选用comboBox控件来设计可以配置这两个参数的方法。

添加这两个控件的同时，我们添加发送编辑框：

       <ComboBox Name="myCOM" Margin="0,40,10,0" VerticalAlignment="Top" HorizontalAlignment="Right" Width="90" Height="22"/>
        <Label Content="COM" HorizontalAlignment="Left" Margin="417,10,0,0" VerticalAlignment="Top" Width="62"/>
        <ComboBox Name="myBaudRate" Margin="0,102,10,0" VerticalAlignment="Top" HorizontalAlignment="Right" Width="90" Height="22"/>
        <Label Content="BaudRate" HorizontalAlignment="Left" Margin="417,71,0,0" VerticalAlignment="Top"/>
        <TextBox HorizontalAlignment="Left" Height="80" Margin="10,240,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="482"/>
       <Label Content="Transmit Data" HorizontalAlignment="Left" Margin="15,214,0,0" VerticalAlignment="Top" Width="97"/>

那么这里我们要读取comboBox控件内容，并将该内容用来配置串口参数：

内容读取： comboBoxName.Text ，默认值的设定为： comboBoxName.SelectedIndex = comboBoxName.Items.IndexOf("Context"); 例如，将参数打印到edit编辑框中：

myCOM.SelectedIndex = myCOM.Items.IndexOf("COM1");
m_textBox1.Text = myCOM.Text;

将其配置为串口参数： myPort.PortName = myCOM.Text;   myPort.BaudRate = int.Parse(myBaudRate.Text); 

整体代码：

CS：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.IO.Ports;

namespace SearilPort
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        SerialPort myPort = new SerialPort();
        bool serialState;
        public MainWindow()
        {
            InitializeComponent();
            myComboxs();
        }
        private void myComboxs()
        {
            myCOM.Items.Add("COM0");
            myCOM.Items.Add("COM1");
            myCOM.Items.Add("COM2");
            myCOM.Items.Add("COM3");
            myCOM.Items.Add("COM4");
            myCOM.SelectedIndex = myCOM.Items.IndexOf("COM1");
            myBaudRate.Items.Add("2400");
            myBaudRate.Items.Add("4800");
            myBaudRate.Items.Add("9600");
            myBaudRate.Items.Add("38400");
            myBaudRate.Items.Add("115200");
            myBaudRate.SelectedIndex = myBaudRate.Items.IndexOf("9600");
            serialState = false;
            myPort.DataReceived += DataReceived;
        }
        private void Btn1_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                if (serialState == false)
                {
                    if(myPort.IsOpen)
                    {
                        myPort.Close();
                    }
                    myPort.BaudRate = int.Parse(myBaudRate.Text);
                    myPort.DataBits = 8;
                    myPort.PortName = myCOM.Text;
                    myPort.Open();
                    serialState = true;
                    m_textBox1.Text = "Serial Port is Opened...
";
                    myBtn.Content = "Closed";
                }
                else
                {
                    if (myPort.IsOpen)
                    {
                        myPort.Close();
                    }
                    serialState = false;
                    m_textBox1.Text = "Serial Port is Closed...
";
                    myBtn.Content = "Open";
                }
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        private void DataReceived(object sender,SerialDataReceivedEventArgs e)
        {
            try
            {
                byte[] inbuf = new byte[8];
                myPort.Read(inbuf, 0, inbuf.Length);
                string str = System.Text.Encoding.Default.GetString(inbuf);
                this.Dispatcher.Invoke(new Action(() =>
                    {
                        foreach (byte i in inbuf)
                        {
                            m_textBox1.Text += i.ToString("X2");
                        }
                        m_textBox1.Text += "
";
                    }));
            }
            catch(Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }
}

AXML:

<Window x:Class="SearilPort.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Button Name="myBtn" Content="Open" HorizontalAlignment="Right" VerticalAlignment="Bottom" Width="75" Click="Btn1_Click" Margin="0,0,25,147"/>
        <TextBox HorizontalAlignment="Left" VerticalAlignment="Top" Width="393" Height="160" Name="m_textBox1" Margin="10,40,0,0"/>
        <ComboBox Name="myCOM" Margin="0,40,10,0" VerticalAlignment="Top" HorizontalAlignment="Right" Width="90" Height="22"/>
        <Label Content="COM" HorizontalAlignment="Left" Margin="417,10,0,0" VerticalAlignment="Top" Width="62"/>
        <ComboBox Name="myBaudRate" Margin="0,102,10,0" VerticalAlignment="Top" HorizontalAlignment="Right" Width="90" Height="22"/>
        <Label Content="BaudRate" HorizontalAlignment="Left" Margin="417,71,0,0" VerticalAlignment="Top"/>
        <TextBox HorizontalAlignment="Left" Height="80" Margin="10,240,0,0" TextWrapping="Wrap" VerticalAlignment="Top" Width="482"/>
        <Label Content="Received Data&#xD;&#xA;" HorizontalAlignment="Left" Margin="15,10,0,0" VerticalAlignment="Top" Width="121" Height="30"/>
        <Label Content="Transmit Data" HorizontalAlignment="Left" Margin="15,214,0,0" VerticalAlignment="Top" Width="97"/>

    </Grid>
</Window>

注：我们将接收事件初始化放在comboBox控件初始化函数内，是为了避免重复申明自定义接收事件函数 myPort.DataReceived += DataReceived; 

至此，串口参数option功能基本设计完成，在接下来的章节中，我们将对接收到数据进行加密，加密后发送回主机，完成创建加密序列号功能。

End.

谢谢.