從日期列表創建日期範圍

Question

我試圖從日期列表中創建一組日期範圍。

這些日期存在於我的對象中。基本上我會遍歷每一行，並將繼續迭代，當時間跨度差異大於5分鐘時，我將停止並使用終點作爲日期範圍。我有一個算法之下，但問題是它排除了很多數據行：

請參閱樣本數據的下方，所需的輸出

**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 

我的代碼給我的結果，但它排除了許多行：

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

上面的initiationDate是StartDate和Start Time。我已經整理上面的列表中按升序從最小日期/時間啓動：

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; 

一旦與日期範圍用戶確認列表形成，我將其發送到視圖中的複選框列表的形式，用戶選擇這些日期，我選擇日期，並再次查找下面的記錄：

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

我會整理這一點。首先創建一個班級來表示你的日期範圍。使用那裏的所有數據，您甚至可以覆蓋ToString()方法來輸出您需要的格式，例如

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); 
    } 
} 

然後，你需要做的就是保持迭代列表，直到你打的日期是不是5分鐘，最後基線內，但也更新當前範圍的結束日期/ ID是什麼。以下應該達到此目的：

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); 
}