Having casting problem in Entity.

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C#

var itemOne = from n in db.TimeTable
              where n.CodeNo == code
              select n.CodeNo;
var itemTwo = from p in db.Address
              where (itemOne.Contains(p.AddCode))
              select p;

Got this error when run-
LINQ to Entities does not recognize the method 'Boolean Contains[Decimal](System.Linq.IQueryable`1[System.Decimal], System.Decimal)' method, and this method cannot be translated into a store expression.

Posted 19-Oct-11 8:29am

divesh12

Updated 19-Oct-11 8:37am

Sander Rossel

v2

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kiran dangar 20-Oct-11 2:00am

what are the datatypes of CodeNo & AddCode ??

divesh12 20-Oct-11 8:49am

Decimal

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Sander Rossel · Answer 1 · 2011-10-22T02:48:00

var itemOne is a Decimal. You say, at the end of the query for itemOne that it should select n.CodeNo. So you are selecting a Decimal, not a TimeTable (which I think you want to actually select).
In the itemTwo query you want to look where itemOne (a ~~TimeTable~~ Decimal.Contains(AddCode). Well, a Decimal does not have a Contains Function, so it will never find it!

C#

var itemOne = from n in db.TimeTable
              where n.CodeNo == code
              select n; // Not the n.CodeNo!
var itemTwo = from p in db.Address
              where (itemOne.Contains(p.AddCode))
              select p;

I think that will solve your problem. To make sure what the type of itemOne and itemTwo are hoover over the var keyword in front of it.
Hope that helps! :)