self Join in linq with lambada expression

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Hi,

Can anyone please tell me hoe to join single table with self. I tried

C#

db.DTOPageSets.Join(db.DTOPageSets, a => a.ContentPageID, b => b.CategoryID, (a, b) => a);

but getting error

C#

Cannot implicitly convert type 'System.Linq.IQueryable<MVCCMSforALONSO.Models.DTOPageSet>' to 'System.Collections.Generic.List<MVCCMSforALONSO.Models.DTOPageSet>'. An explicit conversion exists (are you missing a cast?)

Please help....

Posted 13-Sep-13 4:54am

amolpatil2243

Updated 13-Sep-13 5:18am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

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Jameel VM 13-Sep-13 11:14am

Please post the full code

Neema Derakhshan 14-Sep-13 2:54am

what's db refers to ? DataClassesDataContext ? or DataBase ?

amolpatil2243 16-Sep-13 6:32am

yes

amolpatil2243 16-Sep-13 6:32am

its a datacontext.

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ridoy · Answer 1 · 2013-09-13T08:06:00

Solution 1

As you don't provide your full code here so it is difficult to help you,but following links would definitely help you:
Linq to SQL lambda join[^]
Simple Examples of joining 2 and 3 table using lambda expression[^]
Expressions and Self Join With Lambda in C#[^]

Posted 13-Sep-13 8:06am

ridoy

Neema Derakhshan · Answer 2 · 2013-09-16T21:24:00

Solution 2

I used this and didn't get any error

C#

db.DTOPageSets.Join(db.DTOPageSets.AsEnumerable(), a => a.ContentPageID, b => b.CategoryID, (a, b) => a);

hope it helps

Posted 16-Sep-13 21:24pm

Neema Derakhshan