在IEnumerable结果中使用分组

Question

I have a query like below :

 IEnumerable<qryTable1> templates = from t in db.qryTable1
                                           where (t.GID == 1&&
                                           t.RID == 4 && t.CID == "user")
                                           select t;

Let say, Above query returns following result:

TId GId RId CID
1    1   1   a
1    1   2   a
2    1   1   a
2    1   2   a
3    1   1   a
3    1   2   a

Now I want to get result from the above query like below:(removing RId column so that result have duplicate entries having only TId,GId,CID and then group the result by TId).

TId GId  CID
1    1    a
2    1    a
3    1    a

Also , I want to get the desired output in template object only.It means result should be in ' IEnumerable<qryTable1> ' object.

Answer 1

var distinct = db.qryTable1.Select(r => new {Tid = r.TId, GId = r.GId, CId = r.CId})
    .Distinct();