如何获得2个范围之间的重叠天数？ [英] How to gets the number of overlapping days between 2 ranges?

问题描述

让我先解释一下情况-假设我有4个约会：BS，BE，PS，PE（S代表开始，E代表结束）。
在给定这些日期的时候，我需要知道有多少天会重叠。例如
：BE-05.01，BS-10.01，PS-03.01，PE-07.01
结果是：3（05.01、06.01和07.01重叠）

let me explain the situation first - let's say i have 4 dates: BS, BE, PS, PE (S for start, E for end). I need to know how many days are over lapping when given those dates. for example : BE-05.01 , BS-10.01, PS-03.01, PE-07.01 the result is: 3 (05.01, 06.01 and 07.01 are overlapping)

我写了以下代码，但看起来很乱，我想检查一下是否有更简单的方法可以做到这一点：

I wrote the following code but it seems to messy and i want to check if maybe there is a simpler way to do this:

private static double GetNumOfOverLappingDays(DateTime BS, DateTime BE, DateTime PS, DateTime PE)
    {
        //case 1:
        //                  |--- B ---|
        //                  |----P ---|

        //case 2:
        //                  |--- B ---|
        //                          | --- P --- |

        //case 3:
        //                  |--- B ---|
        //          | --- P ---- |

        //case 4:
        //                  |--- B ---|
        //                     | - P - |

        //case 5:
        //                  |--- B ---|
        //              | -------- P -------- |

        double days = -1;
        bool isNotOverLap = (BS > PE) || (PS > BE);

        if (isNotOverLap == false)
        {
            //case 1
            if (BS == PS && BS == PE)
            {
                days = (PE - PS).TotalDays;
            }
            //case 2
            else if (BE > PS && BE < PE)
            {
                days = (BE - PS).TotalDays;
            }
            //case 3
            else if (BS > PS && BS < PE)
            {
                days = (PE - BS).TotalDays;
            }
            //case 4
            else if (BS < PS && BE > PE)
            {
                days = (PE - PS).TotalDays;
            }
            //case 5
            else if (BS > PS && BE < PE)
            {
                days = (BE - PS).TotalDays;
            }
        }
        return days+1;
    }

在此感谢您的协助，

提交

推荐答案

尝试以下操作：

    private static double GetOverlappingDays(DateTime firstStart, DateTime firstEnd, DateTime secondStart, DateTime secondEnd)
    {
        DateTime maxStart = firstStart > secondStart ? firstStart : secondStart;
        DateTime minEnd = firstEnd < secondEnd ? firstEnd : secondEnd;
        TimeSpan interval = minEnd - maxStart;
        double returnValue = interval > TimeSpan.FromSeconds(0) ? interval.TotalDays : 0;
        return returnValue;
    }

这篇关于如何获得2个范围之间的重叠天数？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IT屋！