How to use Contains method in Linq

Question

Hi,
I am using the below LINQ and I am getting an exception. Please help me to work around it. I want to use Contains()
 string [] values = new string[]{"U","O","D" };
 var exist = (from seq in  connection.BUSINESS_LINE_TEAM 
 where seq.FK_BL_ID == techSpecification.LOBId
where seq.HUM_ID == techSpecification.Created_By
where values.Contains(seq.BL_ROLE_TYPE)
 select seq).Count();
 int result = Convert.ToInt16(exist);
 if (result <= 0)
transconfig.LOB_USER_STATUS_CD ="Y";
else
transconfig.LOB_USER_STATUS_CD ="N";
connection.SaveChanges();
The exception is :
LINQ to Entities does not recognize the method 'Boolean Contains[String](System.Collections.Generic.IEnumerable`1[System.String], System.String)' method, and this method cannot be translated into a store expression.
I will be waiting for replies. It's kinda urgent.

Answer 1

In order to see what query the data provider sent to the server you can do the following.
Just after creating the data context place this line in the code.
db.Database.Log = Console.Write;
Then place a breakpoint after the next line of code, shown next.
var
a =
db.product.Where(p
=>
p.Name.Contains(asKeyword)).ToList();
Then run the application and when it hits the breakpoint open the Visual Studio Output window and the SQL sent to the server should be displayed.
Fernando (MCSD)
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