问题描述
你好
我正在尝试使用zedgraph绘制从串行端口读取的数据.我仍然在学习代码，因此无法推断出该图为何不起作用.请查看代码和建议；
I'm trying to plot the data read from a serial port using zedgraph. I'm still learing to code so I couldn't deduce why the plot does not work. Please have a look at the code and advice;
namespace WindowsApplication2
{
public partial class Form1 : Form
{
// All members variables should be placed here
// make it more readable..
string t;
SerialPort sp;
Thread m_thread;
bool m_running = false;
ManualResetEvent m_event = new ManualResetEvent(true);
bool m_pause = false;
private GraphPane myPane;
public Form1()
{
InitializeComponent();
Control.CheckForIllegalCrossThreadCalls = false;
// User can already search for ports when the constructor of the FORM1 is calling
// And let the user search ports again with a click
// Searching for ports function
SearchPorts();
CreateZedGraph(); //error : Severity Code Description Project File Line Suppression State
//Error CS7036 There is no argument given that corresponds to the required formal parameter
//'w' of 'Form1.DrawPoint(ZedGraphControl, int, PointPair)'
}
// start button
private void btnStart_Click(object sender, EventArgs e)
{
if (m_thread == null || m_thread.IsAlive == false)
{
ClearGraph();
m_thread = new Thread(Process);
m_thread.Start();
}
}
void Process()
{
PointPair point = new PointPair();
btnStart.Enabled = false;
btnStop.Enabled = true;
m_running = true;
while (m_running == true)
{
m_event.WaitOne();
point.Y = Convert.ToDouble(serialPort1);
point.X++; //time instance of measurement??
DrawPoint(zed1, point);
ssData.Value = point.Y.ToString();
RefresheZedGraphs(zed1);
Thread.Sleep(700);
}
btnStart.Enabled = true;
}
private void CreateZedGraph(object sender, SerialDataReceivedEventArgs e, ZedGraphControl zgc)
{
myPane = zgc.GraphPane;
// axes stuff
myPane.Title.Text = "FRDM-KW40z serial Test";
myPane.XAxis.Title.Text = "Time";
myPane.YAxis.Title.Text = "Voltage";
myPane.XAxis.MajorGrid.IsVisible = true;
myPane.YAxis.MajorGrid.IsVisible = true;
myPane.XAxis.MinorGrid.IsVisible = true;
myPane.YAxis.MinorGrid.IsVisible = true;
// data from serial port
PointPairList list = new PointPairList();
zed1.GraphPane.AddCurve("Test", list, Color.Red);
}这是我打开串行端口并从中读取数据的方式；
This is how I open a serial port and read from it;
private void button2_Click(object sender, EventArgs e)
{
comboBox1.Items.Clear();
SearchPorts();
}
void SearchPorts()
{
string[] ports = SerialPort.GetPortNames();
foreach (string port in ports)
{
comboBox1.Items.Add(port);
}
}
private void button3_Click(object sender, EventArgs e)
{
// Catch exception if it will be thrown so the user will see it in a message box
OpenCloseSerial();
}
void OpenCloseSerial()
{
try
{
if (sp == null || sp.IsOpen == false)
{
t = comboBox1.Text.ToString();
sErial(t);
button3.Text = "Close Serial port"; // button text
}
else
{
sp.Close();
button3.Text = "Connect and wait for inputs"; // button text
}
}
catch (Exception err) // catching error message
{
MessageBox.Show(err.Message); // displaying error message
}
}
void sErial(string Port_name)
{
try
{
sp = new SerialPort(Port_name, 115200, Parity.None, 8, StopBits.One); // serial port parameters
sp.DataReceived += new SerialDataReceivedEventHandler(DataReceivedHandler);
sp.Open();
}
catch (Exception err)
{
throw (new SystemException(err.Message));
}
}
//
private void DataReceivedHandler(object sender,SerialDataReceivedEventArgs e)
{
// This below line is not need , sp is global (belongs to the class!!)
//SerialPort sp = (SerialPort)sender;
if (e.EventType == SerialData.Chars)
{
if (sp.IsOpen)
{
string w = sp.ReadExisting();
if (w != String.Empty)
{
Invoke(new Action(() => Control.Update(w)));
}
}
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
if (sp == null || sp.IsOpen == false)
{
OpenCloseSerial();
}
}
private void button3_Click_1(object sender, EventArgs e)
{
}
private void button4_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.InitialDirectory = @"C:\Users\varman\Documents\";
saveFileDialog1.Title = "Save text Files";
saveFileDialog1.CheckFileExists = true;
saveFileDialog1.CheckPathExists = true;
saveFileDialog1.DefaultExt = "txt";
saveFileDialog1.Filter = "Text files (*.txt)|*.txt|All files (*.*)|*.*";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
File.WriteAllText(saveFileDialog1.FileName, zed1.Text);
zed1.Text = saveFileDialog1.FileName;
}
}我在:Invoke(new Action(()=> Control.Update(w)))处收到错误消息；尝试更新图形时可以保存之后.
I get an error at : Invoke(new Action(() => Control.Update(w))); when trying to update the graph so that I can save after that.
我再次在以下位置出错: DrawPoint(zed1，point);
I again have an error at: DrawPoint(zed1, point);
-RV
推荐答案
谢谢您在这里发布.
如果您的问题与zedgraph更相关，则可以在中发布新线程zedgraph支持.
For your question is more related to zedgraph, you could post a new thread in zedgraph support.
或者您可以使用图表在winform中.这是有关
Or you could use chart in winform. Here is the MSDN article about
Visual C#讨论并询问C#编程语言，库，示例和工具.
The Visual C# discuss and ask the C# programming language, libraries, samples and tools.
如果您有一些语法或代码错误，请随时与我们联系.我们将尽力为您提供解决方案.
If you have some grammar or code errors, please feel free to contact us. We will try our best to give you a solution.
感谢您的理解与合作.
最好的问候，
温迪
这篇关于使用zedgraph绘制串口数据.的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！