永远可以返回异常

我有方法读取各种传感器和处理数据。在这些方法中，我有其他的方法，通过串行端口发送命令到电路(获得传感器值)。可能会发生通信错误，我想知道是否可以"返回"异常?例如:

public double AverageSensorValues()
{
  try
  {
   ...
   double sensor1Value = SensorValue(1);
   double sensor2Value = SensorValue(2);
   ...
   }
   catch (Exception ex)
   {
      MessageBox.Show("Error in AverageSensorValues()");
   }
}
public double SensorValue(int sensorNum)
{
   try {
   // Send command to circuit to return value.
   string response = SendCommand(commandStringToGetValue);
   // Check to see if response is an error
   bool isError = ErrorReturned(response);
   if(isError)
      ProcessError(response);  // Throws exception.
   ... // Other things that could cause exceptions to be thrown.
   }
   catch (Exception ex)
   {
      throw new Exception("Error in SensorValue()", ex);
   }
}
public void ProcessError(string errorResponse)
{
   // Split string and get error parameters (#, input command, etc.)
   throw new Exception(String.Format("Error-{0}: See ...", errorNumber));  // Is this OK? More readable than "ER,84,DM,3L" for example.
}

这是可以的还是被认为是"不好的做法"?

谢谢!

编辑

我看了各种各样的回应，看起来我做得完全错了。我试图用上面的例子作为一个快速的例子，但看起来我应该从一开始就发布完整的细节。下面是一个更详细的例子:

public double[] GetHeightAtCoords(CoordClass[] coords)  // Get height measurement at various positions. Called after button click, results are displayed on UI.
{
   try  // Error could occur within one of these methods. If it does, not Program critical but it should notify user and not return any result.
   {
   for(int coordIndex = 0; coordIndex < coords.Length; coordIndex++)  // Cycle through each desired position.
   {
      ...
      currentCoords = GetCurrentCoords();   // Get current actuator position.
      ... //Update UI.
      MoveToCoords(coords[coordIndex]);   // Move actuator to position.
      currentCoords = GetCurrentCoords(); // Verify position.
      EngageBrake();   // Lock actuator in place.
      double height = GetHeight(); // Read sensor data.
      ReleaseBrake();   // Release brake.
      ...
   }
  }
  catch (Exception ex)
  {
     // Display in statusbar.
     statusBar1.Text = String.Format("Error in GetHeightAtCoords(): {0}", ex.Message);
  }
   ...
   return heights;  // Return position heights array.
}
public CoordClass GetCurrentCoords()   // Method to read positional encoder values.
{
   ...
   try
   {
   double xPosition = GetXEncoderValue();   // Return x-coord value.
   double yPosition = GetYEncoderValue();   // Return y-coord value.
   }
   catch (Exception ex)
   {
      throw new Exception("Error in GetCurrentCoords(): {0}", ex.Message);
   }
   ...
   return new CoordClass(xPosition, yPosition); // Return current coords.
}
public void MoveToCoords(CoordClass coord)   // Method to move actuators to desired positions.
{
   try
   {
   ... 
   currentCoords = GetCurrentCoords(); // See where actuators are now.
   ... // Setup movement parameters.
   MoveToX(coord.X);   // Move x-axis actuator to position.
   MoveToY(coord.Y);   // Move y-axis actuator to position.
   }
   catch (Exception ex)
   {
      throw new Exception("Error in MoveToCoords(): {0}", ex.Message);
   }
   ...
}
public double GetXEncoderValue()   // Method to return x-coord value.
{
   string getXCoordCommand = "SR,ML,01,1";   // Serial command to get x-coord.
   ...
   string controllerResponse = SendReceive(getXCoordCommand);  // Send command, get response command.
   if(!ResponseOK(controllerResponse))   // If the response doesn't match the "command OK" response (i.e. SR,ML,01,1,OK)...
   {
      if(IsErrorResponse(controllerResponse))  // See if response is an error response (e.g. command error, status error, parameter count error, etc.)
         // Some known error type occurred, cannot continue. Format error string (e.g. ER,SRML,61) to something more meaningful and report to user (e.g. Read X Value Error: Status error.).
         throw new Exception("Read X Value Error-{0}: {1}", errorNumber, (ErrorEnum)errorNumber);
      else
         // Something else went wrong, cannot continue. Report generic error (Read X Value Error.).
         throw new Exception("Read X Value Error.");
   }
   ...
}
// GetYEncoderValue(), MoveToX(), MoveToY(), GetHeight(), EngageBrake() and ReleaseBrake() follow the same format as EngageBrake().

这是我的逻辑，如果…

调用顺序:getheightatcoordds () -> movetocoordds () -> getcurrentcoordds () -> GetXEncoderValue()，控制器响应错误。

在GetXEncoder()中抛出新的异常，在getcurrentcoordds()中捕获并重新抛出新的异常，在movetocoordds()中捕获并重新抛出新的异常，在getheightatcoordds()中捕获并在状态栏中显示消息(消息= "在getheightatcoordds()中出错:在movetocoordds()中出错:在getcurrentcoordds()中出错:读取X值错误-6:状态错误")。

因为GetXEncoder()可以在一个方法内的多个地方被调用，我认为如果我让原始异常一直冒出来，它对用户几乎没有帮助(例如:"Error in GetHeightAtCoords(): Read X Value Error-6: Status Error"，具体是什么时间?以这个例子为例，哪个读取X值失败了?getheightatcoordds () -> movetocoordds () -> getcurrentcoordds () -> GetXEncoderValue()或getheightatcoordds () -> getcurrentcoordds () -> GetXEncoderValue() ?

希望这更清楚:/

这样的事情曾经发生过吗?你建议我怎么做呢?再次感谢大家的意见!