我对 C# 有点陌生，所以请多多包涵！
我正在编写一个程序，通过 RS232 将代码发送到自制的望远镜支架。
我目前遇到的问题希望非常简单（但对我来说很难！）
例如说我有一个按钮，我想在按住鼠标左键时执行一个循环，（这将是一个连续的 232 数据流），然后当释放鼠标左键时我需要循环停止并执行另一行代码。
我真诚地希望我提供的信息已经足够，并且有人足够好心地帮助我（我已经在互联网上搜索了答案，相信我！）
非常感谢。
【问题讨论】：
挂钩到按钮上的 MouseDown 和 MouseUp 事件。 MouseDown 事件应该产生一个线程，或向线程发出信号以开始执行循环。 MouseUp 事件应该通知线程停止执行循环。
类似这样的：
public class InterruptibleLoop
{
private volatile bool stopLoop;
private Thread loopThread;
public void Start() {
// If the thread is already running, do nothing.
if (loopThread != null) {
return;
}
// Reset the "stop loop" signal.
stopLoop = false;
// Create and start the new thread.
loopThread = new Thread(LoopBody);
loopThread.Start();
}
public void Stop() {
// If the thread is not running, do nothing.
if (loopThread == null) {
return;
}
// Signal to the thread that it should stop looping.
stopLoop = true;
// Wait for the thread to terminate.
loopThread.Join();
loopThread = null;
}
private void LoopBody() {
while (!stopLoop) {
// Do your work here
}
}
}
【讨论】：
方法一： 首先创建一个计时器，其间隔设置为您希望它发送数据的频率。并在滴答事件中发送数据。为按钮的鼠标按下事件和按钮的鼠标向上事件创建一个事件。在鼠标按下事件中，启动计时器。在鼠标向上事件中，停止计时器。
方法二： 与其在鼠标按下事件上启动计时器，不如启动一个新线程，您可以在其中执行连续循环的数据发送。在鼠标向上事件上停止线程。
【讨论】：
namespace Scope_Project_Ver_2
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// *** Output data timer ***
otimer.Interval = 50;
// otimer.Interval = isendFreq;
otimer.Tick += new EventHandler(otimer_Tick);
// *** Input data timer ***
// itimer.Interval = 601; <- to be unchecked
// itimer.Tick += new EventHandler(itimer_Tick); <- to be unchecked
}
public int b1,b2,b3,b4,b5;
public string sb1, sb2, sb3, sb4, sb5;
public int ivorSpeed;
public string svorSpeed;
public int ihorSpeed;
public string shorSpeed;
public int isendFreq;
private void sendDataB_Click(object sender, MouseEventArgs e)
{
if (sendDataCB.Checked)
{
sendDataCB.Checked = false;
if (otimer.Enabled)
otimer.Stop();
}
else
{
sendDataCB.Checked = true;
if (!otimer.Enabled)
otimer.Start();
}
}
void otimer_Tick(object sender, EventArgs e)
{
SerialPort port = new SerialPort(
"COM1", 9600, Parity.None, 8, StopBits.One);
port.Open();
port.Write("Q"); // Q
port.Write(sb1); // 1
port.Write(sb2); // 2
// Binary stuff // Ver Speed Binary 3
byte[] bverbinary = new byte[1];
byte verbinary = 0;
verbinary = Byte.Parse(svorSpeed);
bverbinary[0] = verbinary;
port.Write(bverbinary, 0, bverbinary.Length);
// End of Binary stuff for Ver Speed
// Binary stuff // Hor Speed Binary 4
byte[] bhorbinary = new byte[1];
byte horbinary = 0;
horbinary = Byte.Parse(shorSpeed);
bhorbinary[0] = horbinary;
port.Write(bhorbinary, 0, bhorbinary.Length);
port.Write(sb5); // Movement 5
port.Close();
}
private void vorSpeed_ValueChanged(object sender, EventArgs e)
{
// MessageBox.Show((this.vorSpeed.Value).ToString());
this.Text = "You changed the Vertical Speed to " + vorSpeed.Value;
ivorSpeed = (int)vorSpeed.Value;
svorSpeed = ivorSpeed.ToString();
}
private void horSpeed_ValueChanged(object sender, EventArgs e)
{
// MessageBox.Show((this.horSpeed.Value).ToString());
this.Text = "You changed the Horizontal Speed to " + horSpeed.Value;
ihorSpeed = (int)horSpeed.Value;
shorSpeed = ihorSpeed.ToString();
}
private void scopeUp_MouseDown(object sender, MouseEventArgs e) // Scope Up On
{
b1 = 2;
b2 = 0;
b5 = 1;
sb1 = b1.ToString();
sb2 = b2.ToString();
sb3 = b3.ToString();
sb4 = b4.ToString();
sb5 = b5.ToString();
}
private void scopeUp_MouseUp(object sender, MouseEventArgs e) // Scope Up Off
{
}
private void scopeRight_MouseDown(object sender, MouseEventArgs e)
{
b1 = 1;
b2 = 2;
b5 = 1;
sb1 = b1.ToString();
sb2 = b2.ToString();
sb3 = b3.ToString();
sb4 = b4.ToString();
sb5 = b5.ToString();
}
private void scopeRight_MouseUp(object sender, MouseEventArgs e)
{
}
private void scopeDown_MouseDown(object sender, MouseEventArgs e)
{
b1 = 2;
b2 = 1;
b5 = 1;
sb1 = b1.ToString();
sb2 = b2.ToString();
sb3 = b3.ToString();
sb4 = b4.ToString();
sb5 = b5.ToString();
}
private void scopeDown_MouseUp(object sender, MouseEventArgs e)
{
}
private void scopeLeft_MouseDown(object sender, MouseEventArgs e)
{
b1 = 0;
b2 = 2;
b5 = 1;
sb1 = b1.ToString();
sb2 = b2.ToString();
sb3 = b3.ToString();
sb4 = b4.ToString();
sb5 = b5.ToString();
}
private void scopeLeft_MouseUp(object sender, MouseEventArgs e)
{
}
private void scopeStop_Click(object sender, EventArgs e)
{
b1 = 0;
b2 = 0;
b5 = 0;
sb1 = b1.ToString();
sb2 = b2.ToString();
sb3 = b3.ToString();
sb4 = b4.ToString();
sb5 = b5.ToString();
}
private void sendFreq_ValueChanged(object sender, EventArgs e)
{
this.Text = "You changed the send Freq to " + sendFreq.Value + " m/s";
isendFreq = (int)sendFreq.Value;
}
}
}
【讨论】：