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我現在有一個LINQ查詢:有毛病我的LINQ to Entities查詢
public List<EventSchool> GetEventSchools(int eventID)
{
var eventSchools = db.EventSchools
.Include("Organisation")
.Where(e => e.EventID == eventID)
.ToList();
foreach (var ev in eventSchools)
{
if (db.EventSchoolKeyStages.Where(e => e.EventSchoolID == ev.EventSchoolID).Count() > 0)
{
int ks = db.EventSchoolKeyStages
.Where(e => ev.EventSchoolID == ev.EventSchoolID)
.Sum(e => e.Males + e.Females);
ev.StudentNumbers = ks;
}
}
return eventSchools;
}
當我檢查EventSchools,列表中的所有項目的學生人數顯示爲第一個總。
舉例來說,如果我有列表中的3項:
Item 1 - Males = 10, Females = 10
Item 2 - Males = 1, Females = 2
Item 3 - Males = 200, Females = 500
所有項目具有20 StudentNumbers,而不是:
Item 1 - 20
Item 2 - 3
Item 3 - 700
不知道我做錯了嗎?