Problem with .Contains
- by Rene
Hello there,
I have a little problem which i can't solve.
I want to use an SQL-In-Statement in Linq. I've read in this Forum and in other Forums that I have to use the .Contains (with reverse-thinking-notation :-)).
As input i have a List of Guids. I first copied them into an array and then did something like that :
datatoget = (from p in objectContext.MyDataSet
where ArrayToSearch.Contains(p.Subtable.Id.ToString())
select p).ToList();
datatoget is the result in which all records matching the Subtable.Id (which is a Guid) should be stored.
Subtable is a Detail-Table from MyData, and the Id is a Guid-Type.
I've tried several things (Convert Guid to String, and then using .Contains, etc),
but I always get an Exception which says :
'Linq to Entities' doesn't recognize the Method 'Boolean Contains(System.Guid) and
is not able to Translate this method into a memory expression.
(Something like that, because I'm using the German Version of VS2008)
I am using L2E with .NET 3.5 and am programming in C# with VS 2008.
I've read several Examples, but it doesn't work. Is it perhaps because of using Guid's instead of strings ?
I've also tried to write my own compare-function, but I don't know how to integrate it so that .NET calls my function for comparing.
