以下代码检索所有活动在用户选择的同一天开始和结束,我需要检索用户在激活期间选择的日期的所有活动
例如,活动于3月25日开始,也将于3月25日结束,代码将检索但我需要的是检索25之前开始的活动,25之后结束或25之前开始并25结束活动25活动开始25之后
或者你可以看到我的PIC我的代码正在做但我想做A,B,C和D http://im46.gulfup.com/4Cudk8.jpg
Public Shared Function SelectByDate(ActivityDate As Date) As List(Of vActivity)
Dim st As Date = ActivityDate
Dim et As Date = st.AddDays(1).AddSeconds(-1)
Using ctx As New ActivitiesEntities
Dim Lst = (From actv In ctx.vActivities
Select actv
Where actv.StartTime >= st And actv.EndTime <= et
Order By actv.StartTime)
Return Lst.ToList
End Using
End Function
答案 0 :(得分:0)
Where actv.StartTime <= usertime And actv.EndTime >= usertime
你的问题有点令人困惑,但这似乎就是你所描述的。
您的屏幕截图已被阻止,但是:如果您想要A或B或C ..只需编写您的where子句。
where (actv.StartTime <= usertime And actv.EndTime >= usertime) or (something else) or (something else)
答案 1 :(得分:0)
Dim LstA = (From actv In ctx.vActivities
Select actv
Where actv.StartTime >= st And actv.EndTime <= et
Order By actv.StartTime)
Dim LstB = (From actv In ctx.vActivities
Select actv
Where actv.StartTime < st And actv.EndTime < st
Order By actv.StartTime)
Dim LstC = (From actv In ctx.vActivities
Select actv
Where actv.StartTime > et And actv.EndTime > et
Order By actv.StartTime)
Dim LstD = (From actv In ctx.vActivities
Select actv
Order By actv.StartTime)