我有很多一對多的關係建立在我的數據庫,像這樣: User
-------
Id (PK, Identity)
First
Last
...various other fields
Skill
-------
Id (PK, Identity)
Description
UserSkill
-----------
UserId (PK, FK on User.Id)
Sk
聽起來有點複雜,但這裏是我想做的事: 我過濾的MyObject某些屬性在List<MyObject>成新LINQ對象爲: var filteredMyObjects = from r in myObjects select new { r.ComponentName, r.Group, r.Key };
現在的問題是,屬性ComponentName,Group和Key應該來作爲輸入(例如屬性名
給出以下表達式,我該如何着手獲取一個明確的場所列表,而不會得到這個令人討厭的「表達式類型」NhDistinctExpression「不受此SelectClauseVisitor支持。」錯誤? public Dictionary<int, string> GetScheduledVenuesFuture()
{
var venues = from v in _sp.Curren
我在SQL查詢,如下面的代碼: select *
from Registration r
inner join RegistrationService rs on rs.RegistrationID = r.RegistrationID
inner join Service s on s.ServiceID = rs.ServiceID
where cast(Registr
我怎麼能這個查詢語法轉換方法的語法在LINQ: return (from x in db.Table1
join y in db.Table1 on x.ID equals y.ID - 1
where Convert.ToInt32(y.ID) >= Convert.ToInt32(x.ID)
orderby x.Name
任何人都知道如何將其表示爲實體框架查詢?無論是方法語法還是查詢語法都很好。 Declare @UserId int = 18
Select *
From [Profiles]
Where [Profiles].[ProfileId]
IN(Select [SecurityProfileAssignments].[ProfileId]
From [SecurityProfileU