将linq-to-objects查询结果放入类型化字典中

本文关键字：类型化 字典 linq-to-objects 查询 结果 | 更新日期: 2023-09-27 17:58:17

对LINQ来说还是个新鲜事。似乎应该有一种更优雅的方法来使用ToDictionary，但无法解决。这是我要清理的代码：

 var EventOccurrencesMappedToPatientMeds = from pm in allPtMeds
      from e in thisUsersEventOccurrencesPlusEventData
      where e.EventContainer.Event.PatientMedId == pm.MedicationId
      select new ScheduleEventOccurrenceMedPair{ 
           PatientMedication = pm, 
           ScheduledEventOccurrence = e.EventOccurrence 
      };
 int evtOccCount = 1;
 foreach (var evtOcc in EventOccurrencesMappedToPatientMeds)
 {
      // EventOccurrenceChoices is a Dictionary of type <int, IScheduledEventOccurrenceMedPair>
      message.EventOccurrenceChoices.Add(evtOccCount,(ScheduleEventOccurrenceMedPair)evtOcc);
 }

将linq-to-objects查询结果放入类型化字典中

您可以使用重载的Enumerable。选择要包含索引的方法，然后使用ToDictionary:

var dict = EventOccurrencesMappedToPatientMeds
               .Select((e, i) => new { Event = e, Index = i + 1 })
               .ToDictionary(o => o.Index,
                             o => (ScheduleEventOccurrenceMedPair)o.Event);

使用ToDictionary扩展方法。

类似这样的东西：

var i = 1;
var resultDictionary = (
    from pm in allPtMeds
    from e in thisUsersEventOccurrencesPlusEventData
    where e.EventContainer.Event.PatientMedId == pm.MedicationId
    select new ScheduleEventOccurrenceMedPair
    {
        PatientMedication = pm,
        ScheduledEventOccurrence = e.EventOccurrence
    })
    .ToDictionary(arg => i++, arg => arg);
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