如果任何列具有空值，则按日期和小时获取所有记录组

Question

我有两张桌子。

第一个是open count：

openDate                       OpenCount
2014-08-01 07:00:06.163          1
2014-08-01 09:00:11.873          1 
2014-08-02 03:00:42.623          1
2014-08-02 05:00:48.363          1
2014-08-02 08:01:15.243          1
2014-08-03 07:01:16.507          1

第二个是点击次数

clickDate                       Count
2014-08-01 08:00:06.163           1
2014-08-01 09:00:11.873           1 
2014-08-01 11:00:42.623           1
2014-08-01 15:00:48.363           1
2014-08-03 07:01:15.243           1
2014-08-11 07:01:16.507           1

我想要 2 小时明智、4 小时明智、每周明智和所有时间明智

我使用了以下代码

int groupHours = 2;

int take = 12;
if (type == 1 )
{ groupHours = 2; }
else if (type == 2 )
{ groupHours = 4; }
else if (type == 7 )
{
    groupHours = 24;
    take = 7;
}
else if( type == 0)
{

    take = 12;
}



var queryOpen = objEmailOpen.AsEnumerable()
            .GroupBy(row => new
            {

                Date = row.openDate.Value.Date,
                Hour = (((row.openDate.Value.Hour) / groupHours)) * groupHours
            })
    .Select(grp => new
    {
        Date = grp.Key.Date.AddHours(grp.Key.Hour),
        Hour = grp.Key.Hour,
        OpenCount = grp.Count()
    }).OrderBy(m => m.Date).Take(take).ToList();

var queryClick = objEmailClick.AsEnumerable()
        .GroupBy(row => new
        {
            Date = row.clickedDate.Value.Date,
            Hour = (((row.clickedDate.Value.Hour) / groupHours)) * groupHours
        })
        .Select(grp => new
        {
            Date = grp.Key.Date.AddHours(grp.Key.Hour),
            Hour = grp.Key.Hour,
            ClickCount = grp.Count()
        }).OrderBy(m => m.Date).ToList();


var timeWise = (from m in queryOpen
                join n in queryClick on new { m.Date, m.Hour } equals new { n.Date, n.Hour }
                select new
                {
                    date = Convert.ToDateTime(m.Date),
                    open = m.OpenCount,
                    click = n.ClickCount
                }).ToList().Take(12);

var result = new
{ 
    timeWise = timeWise
};

但这不会给出正确的结果，如果任何时间间隔点击计数为空（0），那么它不会显示该时间间隔记录，这也不适用于所有时间记录。

我希望所有时间记录只在第 12 行，可能需要 1 天的时间间隔或多天或多月。

但结果包含正确的日期时间间隔，例如（如果时间间隔为 2 小时）：

date                   openCount      clickcount
2018-8-1 07:00:00        15                 3
2018-8-1 09:00:00        3                  0
2018-8-1 011:00:00       12                 2

Answer 1

创建一个时间间隔列表，如下面的代码。然后使用左外连接将您的表与列表组合以获取空值

            DateTime startDay = DateTime.Now.Date;
            DateTime endDay = startDay.AddDays(1);

            int intervalMinutes = 60;

             DateTime  timeCounter = startDay;

             List<DateTime> intervals = new List<DateTime>();
             while (timeCounter < endDay)
             {
                 intervals.Add(timeCounter);
                 timeCounter = timeCounter.AddMinutes(intervalMinutes);
             }