WPF内实现与串口发送数据和接收数据
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原文:WPF内实现与串口发送数据和接收数据
与串口发送数据和接收数据，在此作一个简单的Demo.此Demo可以实现按下硬件按钮，灯亮，发送灯状态数据过来。并且可以实现几个灯同时亮，发送灯的状态数据过来。PC端实现点击按钮让硬件灯亮。
此处为4个灯，发送过来的数据：0代表暗，1代表亮。列如：1010代表1号灯和3号灯亮，2号和4号灯暗。
发送过去的数据：0代表1号灯亮，1代表1号灯灭、2代表2号灯亮，3代表2号灯灭、4代表3号灯亮，5代表3号灯灭、6代表4号灯亮，7代表4号灯灭。
布局代码：
<Grid>
<TextBox HorizontalAlignment="Left" Height="23" Margin="112,59,0,0" TextWrapping="Wrap" Name="txtSend" VerticalAlignment="Top" Width="120"/>
<TextBox HorizontalAlignment="Left" Height="23" Margin="112,113,0,0" TextWrapping="Wrap" Name="txtReceive" VerticalAlignment="Top" Width="120"/>
<Button Content="发送" Name="btnSend" HorizontalAlignment="Left" Margin="83,271,0,0" VerticalAlignment="Top" Width="35" Click="btnSend_Click"/>
<Button Content="发送" Name="btnSend1" HorizontalAlignment="Left" Margin="143,271,0,0" VerticalAlignment="Top" Width="35" Click="btnSend1_Click"/>
<Button Content="发送" Name="btnSend2" HorizontalAlignment="Left" Margin="203,271,0,0" VerticalAlignment="Top" Width="35" Click="btnSend2_Click"/>
<Button Content="发送" Name="btnSend3" HorizontalAlignment="Left" Margin="263,271,0,0" VerticalAlignment="Top" Width="35" Click="btnSend3_Click"/>
<Label Name="one" Background="Red" HorizontalAlignment="Left" Margin="84,190,0,0" VerticalAlignment="Top" Height="24" Width="28"/>
<Label Name="two" Background="Red" HorizontalAlignment="Left" Margin="144,190,0,0" VerticalAlignment="Top" Height="24" Width="28"/>
<Label Name="three" Background="Red" HorizontalAlignment="Left" Margin="204,190,0,0" VerticalAlignment="Top" Height="24" Width="28"/>
<Label Name="four" Background="Red" HorizontalAlignment="Left" Margin="264,190,0,0" VerticalAlignment="Top" Height="24" Width="28"/>
</Grid>后台代码：
先
private SerialPort Sp = new SerialPort();
public delegate void HandleInterfaceUpdataDelegate(string text);
private HandleInterfaceUpdataDelegate interfaceUpdataHandle;
String[] arr = { "0", "0", "0", "0" };//用于存储硬件上面灯状态其次在Loaded事件添加用于更改串口参数：
//更改参数
Sp.PortName = "COM3";
Sp.BaudRate = 115200;
Sp.Parity = Parity.None;
Sp.StopBits = StopBits.One;编写监听和发送数据事件：
private void Serial()
{
Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
if (!Sp.IsOpen)
{
Sp.Open();
}
//用字节的形式发送数据
SendBytesData(Sp);
}
//发送二进制数据
private void SendBytesData(SerialPort Sp)
{
byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text);
Sp.Write(bytesSend, 0, bytesSend.Length);
}
public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
/* byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
//Dispatcher.Invoke(interfaceUpdataHandle, new string[]{ Encoding.UTF8.GetString(readBuffer)});
Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(readBuffer) });
//Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });*/
SerialPort serialPort = (SerialPort)(sender);
System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱
int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致
byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据
//received_count += n;//增加接收计数
serialPort.Read(buf, 0, n);//读取缓冲数据
//因为要访问ui资源，所以需要使用invoke方式同步ui
interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象
// Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });
Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(buf) });
//serialPort.Close();
}
private void UpdateTextBox(string text)
{
txtReceive.Text = text;
String Receive = Convert.ToString(text);
if (Receive != "")
{
// MessageBox.Show("receive", Receive);
String Receive1 = Receive.Substring(0, 1);
String Receive2 = Receive.Substring(1, 1);
String Receive3 = Receive.Substring(2, 1);
String Receive4 = Receive.Substring(3, 1);
if (Receive1 == 1.ToString())
{
one.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[0] = 1.ToString();
}
else
{
one.Background = new SolidColorBrush(Colors.Red);
arr[0] = 0.ToString();
}
if (Receive2 == 1.ToString())
{
two.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[1] = 1.ToString();
}
else
{
two.Background = new SolidColorBrush(Colors.Red);
arr[1] = 0.ToString();
}
if (Receive3 == 1.ToString())
{
three.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[2] = 1.ToString();
}
else
{
three.Background = new SolidColorBrush(Colors.Red);
arr[2] = 0.ToString();
}
if (Receive4 == 1.ToString())
{
four.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[3] = 1.ToString();
}
else
{
four.Background = new SolidColorBrush(Colors.Red);
arr[3] = 0.ToString();
}
//String abc = Convert.ToString(arr);
//MessageBox.Show("abc", abc);
// MessageBox.Show("arr", arr);
}
}最后button点击事件添加：
private void btnSend_Click(object sender, RoutedEventArgs e)
{
if (arr[0] == 0.ToString())
{
txtSend.Text = "0";
Serial();
}
else
{
txtSend.Text = "1";
Serial();
}
}
private void btnSend1_Click(object sender, RoutedEventArgs e)
{
if (arr[1] == 0.ToString())
{
txtSend.Text = "2";
Serial();
}
else
{
txtSend.Text = "3";
Serial();
}
}
private void btnSend2_Click(object sender, RoutedEventArgs e)
{
if (arr[2] == 0.ToString())
{
txtSend.Text = "4";
Serial();
}
else
{
txtSend.Text = "5";
Serial();
}
}
private void btnSend3_Click(object sender, RoutedEventArgs e)
{
if (arr[3] == 0.ToString())
{
txtSend.Text = "6";
Serial();
}
else
{
txtSend.Text = "7";
Serial();
}
}要想在程序开始时就可以监听数据，在其Loaded里面添加上： Serial();
完整后台代码：
public partial class MainWindow : Window
{
private SerialPort Sp = new SerialPort();
public delegate void HandleInterfaceUpdataDelegate(string text);
private HandleInterfaceUpdataDelegate interfaceUpdataHandle;
String[] arr = { "0", "0", "0", "0" };//用于存储硬件上面灯状态
public MainWindow()
{
InitializeComponent();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
//更改参数
Sp.PortName = "COM3";
Sp.BaudRate = 115200;
Sp.Parity = Parity.None;
Sp.StopBits = StopBits.One;
Serial();
}
private void btnSend_Click(object sender, RoutedEventArgs e)
{
if (arr[0] == 0.ToString())
{
txtSend.Text = "0";
Serial();
}
else
{
txtSend.Text = "1";
Serial();
}
}
private void btnSend1_Click(object sender, RoutedEventArgs e)
{
if (arr[1] == 0.ToString())
{
txtSend.Text = "2";
Serial();
}
else
{
txtSend.Text = "3";
Serial();
}
}
private void btnSend2_Click(object sender, RoutedEventArgs e)
{
if (arr[2] == 0.ToString())
{
txtSend.Text = "4";
Serial();
}
else
{
txtSend.Text = "5";
Serial();
}
}
private void btnSend3_Click(object sender, RoutedEventArgs e)
{
if (arr[3] == 0.ToString())
{
txtSend.Text = "6";
Serial();
}
else
{
txtSend.Text = "7";
Serial();
}
}
private void Serial()
{
Sp.DataReceived += new SerialDataReceivedEventHandler(Sp_DataReceived);
if (!Sp.IsOpen)
{
Sp.Open();
}
//用字节的形式发送数据
SendBytesData(Sp);
}
//发送二进制数据
private void SendBytesData(SerialPort Sp)
{
byte[] bytesSend = System.Text.Encoding.Default.GetBytes(txtSend.Text);
Sp.Write(bytesSend, 0, bytesSend.Length);
}
public void Sp_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
/* byte[] readBuffer = new byte[Sp.ReadBufferSize];
Sp.Read(readBuffer, 0, readBuffer.Length);
//Dispatcher.Invoke(interfaceUpdataHandle, new string[]{ Encoding.UTF8.GetString(readBuffer)});
Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(readBuffer) });
//Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });*/
SerialPort serialPort = (SerialPort)(sender);
System.Threading.Thread.Sleep(100);//延缓一会，用于防止硬件发送速率跟不上缓存数据导致的缓存数据杂乱
int n = serialPort.BytesToRead;//先记录下来，避免某种原因，人为的原因，操作几次之间时间长，缓存不一致
byte[] buf = new byte[n];//声明一个临时数组存储当前来的串口数据
//received_count += n;//增加接收计数
serialPort.Read(buf, 0, n);//读取缓冲数据
//因为要访问ui资源，所以需要使用invoke方式同步ui
interfaceUpdataHandle = new HandleInterfaceUpdataDelegate(UpdateTextBox);//实例化委托对象
// Dispatcher.Invoke(interfaceUpdateHandle, new string[] { Encoding.ASCII.GetString(buf) });
Dispatcher.Invoke(interfaceUpdataHandle, new string[] { Encoding.ASCII.GetString(buf) });
//serialPort.Close();
}
private void UpdateTextBox(string text)
{
txtReceive.Text = text;
String Receive = Convert.ToString(text);
if (Receive != "")
{
// MessageBox.Show("receive", Receive);
String Receive1 = Receive.Substring(0, 1);
String Receive2 = Receive.Substring(1, 1);
String Receive3 = Receive.Substring(2, 1);
String Receive4 = Receive.Substring(3, 1);
if (Receive1 == 1.ToString())
{
one.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[0] = 1.ToString();
}
else
{
one.Background = new SolidColorBrush(Colors.Red);
arr[0] = 0.ToString();
}
if (Receive2 == 1.ToString())
{
two.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[1] = 1.ToString();
}
else
{
two.Background = new SolidColorBrush(Colors.Red);
arr[1] = 0.ToString();
}
if (Receive3 == 1.ToString())
{
three.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[2] = 1.ToString();
}
else
{
three.Background = new SolidColorBrush(Colors.Red);
arr[2] = 0.ToString();
}
if (Receive4 == 1.ToString())
{
four.Background = new SolidColorBrush(Colors.MediumAquamarine);
arr[3] = 1.ToString();
}
else
{
four.Background = new SolidColorBrush(Colors.Red);
arr[3] = 0.ToString();
}
//String abc = Convert.ToString(arr);
//MessageBox.Show("abc", abc);
// MessageBox.Show("arr", arr);
}
}
}这样可以实现btn和硬件本身按钮同时控制灯亮灯灭。
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