How to Use Linq Query Using Group By for 4 Table's Relationship

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I have 4 tables ,Which are as per below.

SQL

Table1

a1(primarykey)
a2
a3
................
Table2

b1 (primarykey)
a1(foreiegnkey)
b2
b3
.................
Table3

c1(primarykey)
b1(foreiegnkey)
c2
c3
...................
Table4

d1(primarykey)
c1(foreiegnkey)
d2
d3
.....................


var p = from r in db.Table1
        where r.a1 == Convert.ToInt32(Session["idforexcelpage"].ToString())
        join a in db.Table2 on r.Table1 equals a.Table2
        join b in db.Table3 on a.Table2 equals b.Table3
        join e in db.Table4 on b.Table3 equals e.Table4
        group a by new { a.b2,e.d3,b.c3,e.d2 } into g
        select new
               {

                            InviteeName =g.Key.b2
                            Text = g.Key.d3,
                            Answer = g.Key.c3,
                            Email = g.Key.d2

                };

Here is my Query and table information.

But use with this query i not give my Excepted Output,Here I want group from column b2 which is field of Table2.

But i don't grouping it.Can anuone Help me to solve this Isssue..?

Thanks in advance.

Posted 16-Apr-14 21:36pm

ketan italiya

Updated 16-Apr-14 21:37pm

v2

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DamithSL · Answer 1 · 2014-04-16T22:23:00

Solution 1

if you want to group by column b2 only, then

C#

var p = from r in db.Table1
        where r.a1 == Convert.ToInt32(Session["idforexcelpage"].ToString())
        join a in db.Table2 on r.Table1 equals a.Table2
        join b in db.Table3 on a.Table2 equals b.Table3
        join e in db.Table4 on b.Table3 equals e.Table4
        group a by new a.b2 into g
        select new
               {InviteeName =g.Key};

Posted 16-Apr-14 22:23pm

DamithSL

Comments

ketan italiya 17-Apr-14 5:26am

Thanks for the solution.

But i use repeater and i also want to bind other column in it.like,
InviteeName,Text,Answer ,Email then what should i do.
my problem is that with that.