我有一个应该在我的程序中连续运行的线程，并从一组传感器解析传入的串行数据。
//initialized as a global variable
System.Threading.Thread processThread = new System.Threading.Thread(ProcessSerialData);
//this gets called when you press the start button
processThread.Start();
private void ProcessSerialData()
{
while (true)
{
//do a whole bunch of parsing stuff
}
int howDidYouGetHere = 0;
}
我的程序如何到达“int howDidYouGetHere = 0”行？
完整代码可以在这里找到：
/// <summary>
/// ProcessSerialData thread will be used to continue testing the connection to the controller,
/// process messages in the incoming message queue (actually a linked list),
/// and sends new messages for updated data.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void ProcessSerialData()
{
while (true)
{
UpdateAhTextbox(test.ampHoursOut.ToString());
if (!relayBoard.OpenConn())
{
MessageBox.Show("Connection to controller has been lost.");
testInterrupted = "Lost connection. Time = " + test.duration;
UpdateStatusText(false);
ShutErDown();
}
/////////////////////////////////////////////////////
if (incomingData.Count > 0)
{
string dataLine = "";
try
{
dataLine = incomingData.First();
UpdateParsedDataTextbox(dataLine + "\r\n");
}
catch (System.InvalidOperationException emai)
{
break; //data hasn't come in yet, it will by the time this runs next.
}
incomingData.RemoveFirst();
if (dataLine.Contains("GET")) // some sensor values (analog/temp/digital) has come in
{
if (dataLine.Contains("GETANALOG")) // an analog value has come in
{
int index = dataLine.IndexOf("CH");
int pin = (int)Char.GetNumericValue(dataLine[index + 2]);
double value = 0;
int dataLineLength = dataLine.Length;
if (dataLineLength > 13) // value is appended to end of line
{
try
{
value = Convert.ToDouble(dataLine.Substring(13));
}
catch // can't convert to double
{
int index2 = dataLine.IndexOf("CH", 3);
if (index2 != -1) // there happen to be two sets of commands stuck together into one
{
string secondHalf = dataLine.Substring(index2);
incomingData.AddFirst(secondHalf);
}
}
}
else // value is on the next line
{
try
{
value = Convert.ToDouble(incomingData.First());
incomingData.RemoveFirst();
}
catch // can't convert to double
{
MessageBox.Show("Error occured: " + dataLine);
}
}
switch (pin)
{
case 1:
ReadVoltage(value);
break;
case 2:
ReadAmperage(value);
break;
}
}
else if (dataLine.Contains("GETTEMP")) // received reply with temperature data
{
int index = dataLine.IndexOf("CH");
int pin = (int)Char.GetNumericValue(dataLine[index + 2]); // using index of CH, retrieve which pin this message is coming from
double value = 0;
int dataLineLength = dataLine.Length;
if (dataLineLength > 11) // value is appended to end of line
{
try
{
value = Convert.ToDouble(dataLine.Substring(11));
}
catch // can't convert to double
{
int index2 = dataLine.IndexOf("CH", 3);
if (index2 != -1) // there happen to be two sets of commands stuck together into one
{
string secondHalf = dataLine.Substring(index2);
incomingData.AddFirst(secondHalf);
}
}
}
else // value is on the next line
{
value = Convert.ToDouble(incomingData.First());
incomingData.RemoveFirst();
}
ReadTemperature(pin, value);
}
else // must be CH3.GET
{
int index = dataLine.IndexOf("CH");
int pin = (int)Char.GetNumericValue(dataLine[index + 2]); // using index of CH, retrieve which pin this message is coming from
if (pin == 3) // only care if it's pin 3 (BMS), otherwise it's a mistake
{
double value = 0;
int dataLineLength = dataLine.Length;
if (dataLineLength > 7) // value is appended to end of line
{
try
{
value = Convert.ToDouble(dataLine.Substring(7));
}
catch // can't convert to double
{
int index2 = dataLine.IndexOf("CH", 3);
if (index2 != -1) // there happen to be two sets of commands stuck together into one
{
string secondHalf = dataLine.Substring(index2);
incomingData.AddFirst(secondHalf);
}
}
}
else // value is on the next line
{
value = Convert.ToDouble(incomingData.First());
incomingData.RemoveFirst();
}
ReadBMS(value);
}
}
}
else if (dataLine.Contains("REL")) // received reply about relay turning on or off.
{
if (dataLine.Contains("RELS")) // all relays turning on/off
{
if (dataLine.Contains("ON"))
{
for (int pin = 1; pin <= 4; pin++)
{
test.contactors[pin] = true;
}
}
else // "OFF"
{
for (int pin = 1; pin <= 4; pin++)
{
test.contactors[pin] = false;
}
}
}
else // single relay is turning on/off
{
int index = dataLine.IndexOf("REL");
int pin = (int)Char.GetNumericValue(dataLine[index + 3]);
if (dataLine.Contains("ON"))
{
test.contactors[pin] = true;
}
else if (dataLine.Contains("OFF"))
{
test.contactors[pin] = false;
}
else if (dataLine.Contains("GET"))
{
if (Convert.ToInt32(incomingData.First()) == 1)
test.contactors[pin] = true;
else
test.contactors[pin] = false;
incomingData.RemoveFirst();
}
}
}
}
/////////////////////////////////////////////////////
// we only want more data if we're done processing the current data, otherwise we're stuck with too much and processing is heavily delayed.
if (isTestRunning && incomingData.Count < 3)
{
//read & output v, a, bms state
sendToController("CH1.GETANALOG"); // get voltage
sendToController("CH2.GETANALOG"); // get amperage
sendToController("CH3.GET"); // get BMS state
//read & output temperature
sendToController("CH4.GETTEMP"); // get temperature
sendToController("CH5.GETTEMP");
string lines = "Ah Out: " + test.ampHoursOut + ", Voltage: " + test.voltage +
", Amperage: " + test.amperage + ", Cell Temperature: " + test.tempBattery +
", Load Temperature: " + test.tempLoad;
WriteToLog(lines);
}
}
int howDidYouGetHere = 0;
}
答案 0 :(得分：2)
break（忽略嵌套switch内的那些）会突破while循环。
答案 1 :(得分：-1)
也许你曾尝试使用UpdateParsedDataTextbox来更新你的UI这会导致InvalidOperationException（然后打破while循环），因为你试图从不拥有它的线程访问UI控件控制。