Question

做一些c＃循环和if语句。获取for循环中无法访问代码的突出显示。我无法理解这一点。

        public bool checkTime()
    {

        // Read values back from Json file
        var serializedList = File.ReadAllText(@filePathTimes);

        // getting a list of LockTime objects
        List<LockTime> deserializedList = (List<LockTime>)JsonConvert.DeserializeObject(serializedList, typeof(List<LockTime>));

        if (deserializedList.Count != 0)
        {

                // Grab whatever data you want from this list to store somewhere, such as a list of all Start and End integers.
                List<DateTime> intStartList = deserializedList.Select(entry => entry.Start).ToList();
                List<DateTime> intEndList = deserializedList.Select(entry => entry.End).ToList();

                //Then I do a foreach loop to go through every value in the start list and add the same located value to my listOfTimes (the list of LockTime objects with start and end)
                for (int x = 0; x < intStartList.Count; x++)
                {
                    TimeSpan start = new TimeSpan(intStartList[x].Hour, intStartList[x].Minute, intStartList[x].Second);
                    TimeSpan end = new TimeSpan(intEndList[x].Hour, intEndList[x].Minute, intEndList[x].Second);
                    TimeSpan now = DateTime.Now.TimeOfDay;
                    LockTime theTime = new LockTime(intStartList[x], intEndList[x]);
                    _lockTimes.Add(theTime);
                    if((now > start) && (now < end))
                    {
                        return true;
                    }

                        return false;

                }
        }
        return false;
    }

无法访问代码的亮点出现在for循环的x ++上。任何想法为什么会这样？

Answer 1

这是因为无论发生什么，循环内的代码都将执行return true;或return false;。

循环不会循环。

Answer 2

原因是因为你打电话：

return true

或

return false

在循环中，所以在经过一次后始终退出。

无法访问的代码C＃

2 个答案: