Question

我正在尝试从日期列表中创建一组日期范围。

这些日期出现在我的对象中。基本上我会迭代每一行并继续迭代，当时间跨度差异大于5分钟时，我将停止并使用终点作为日期范围。我有一个算法，但问题是它排除了许多数据行：

请参阅下面的示例数据和所需的输出

**Sample Data**

  Start_Date   Start_Date_Time    Replicate
    12.12.2012   8:22:58            10
    12.12.2012   8:22:58            30
    12.12.2012   8:22:58            31
    12.12.2012   8:22:58            32
    12.12.2012   8:22:58            33
    12.12.2012   8:22:58            34 
    12.14.2012   9:49:27            54
    12.14.2012   9:49:27            55
    12.14.2012   9:49:27            78
    12.14.2012   9:49:27            99
    12.14.2012   9:58               120
    12.14.2012   9:58               140
    12.14.2012   9:58               142
    12/12/2012   9:59               144
    12/12/2012   9:59               146
    12/12/2012   9:59               148
    12/12/2012   9:59               150

**Desired Output**
Date Ranges
8:22:58-8:22:58   Replicate10-34
9:49:27-9:49:27   Replicate54-99
9:58-9:59         Replicate120-150

我的代码给了我结果，但它排除了很多行：

lf.ReplicateBlocks.OrderBy(x => x.InitiationDate);

上面的initiateDate是StartDate和Start Time。我按升序对上面的列表进行了排序，从最短的日期/时间开始：

 DateTime minimumDateTime = DateTime.MinValue;

 foreach (RunLog.Domain.Entities.ReplicateBlock rb in lf.ReplicateBlocks)
 {
   TimeSpan intervalMinutes = rb.InitiationDate.Subtract(minimumDateTime);

   if (intervalMinutes.TotalMinutes >= 5)
   {
     minimumDateTime = rb.InitiationDate;

     //minDates.Add(minimumDateTime);

     UserConfirmationErrors confirmationRun = new UserConfirmationErrors();
     confirmationRun.minDate = rb.InitiationDate;
     confirmationRun.replicateID = rb.ReplicateId;

     uc.userConfirmationList.Add(confirmationRun);
   }
 }

 List<RunLog.Domain.Entities.RunLogEntryDatesDisplay> reDisplay = new List<Domain.Entities.RunLogEntryDatesDisplay>();

 foreach (var minDate in uc.userConfirmationList)
 {
   RunLog.Domain.Entities.RunLogEntryDatesDisplay red = new Domain.Entities.RunLogEntryDatesDisplay();
   reDisplay.Add(new Domain.Entities.RunLogEntryDatesDisplay() { runDate = minDate.minDate, DateRange = string.Format("{0} - {1}", minDate.minDate, minDate.minDate.AddMinutes(5)), MinimumReplicateId = minDate.replicateID.ToString() });
 }

 //return reDisplay.OrderByDescending(t => t.runDate).ToList();
 return reDisplay;

一旦形成了带有日期范围的用户确认列表，我就会以复选框列表的形式将其发送到视图，用户选择这些日期并选择所选日期并在下面再次查找这些记录：

  var query = from d in selectedDates
                    from o in lf.ReplicateBlocks
                    where (d.Checked &&
                          o.InitiationDate >= d.runDate &&
                          o.InitiationDate <= d.runDate.AddMinutes(5))
                    select o;

Answer 1

我会稍微整理一下。首先创建一个表示日期范围的类。有了这里的所有数据，你甚至可以覆盖ToString()方法来输出你需要的格式。

public class ReplicationDateRange
{
    public DateTime StartDate { get; set; }
    public DateTime EndDate { get; set; }
    public int StartId { get; set; }
    public int EndId { get; set; }
    public override string ToString()
    {
        return String.Format("{0}-{1} Replicate {2}-{3}", StartDate.ToShortDateString(), EndDate.ToShortDateString(), StartId, EndId);
    }
}

然后你需要做的是继续迭代列表，直到你达到一个不在最后一个基线的5分钟内的日期，同时还要更新当前范围的结束日期/ id。以下内容应达到此目的：

var dateRanges = new List<ReplicationDateRange>();
DateTime baselineDate = DateTime.MinValue;
ReplicationDateRange currentDateRange = null;
foreach (var block in lf.ReplicationBlocks.OrderBy(x => x.InitiationDate))
{
    if ((block.InitiationDate - baselineDate).TotalMinutes <= 5)
    {
        currentDateRange.EndDate = block.InitiationDate;
        currentDateRange.EndId = block.ReplicateId;
    }
    else
    {
        baselineDate = block.InitiationDate;
        currentDateRange = new ReplicationDateRange()
        {
            StartDate = block.InitiationDate,
            EndDate = block.InitiationDate,
            StartId = block.ReplicateId,
            EndId = block.ReplicateId
        };
        dateRanges.Add(currentDateRange);
    }
}
foreach (var d in dateRanges)
{
    Console.WriteLine(d);
}

从日期列表创建日期范围

1 个答案: