How to handle large payloads in WCF services?

Question

Hi All,
I have developed WCF service,Which takes list of Employee Ids and return employee details.
The service is working fine with 500 employee Ids but when we receive request with 5000 employee Ids the service taking much time to complete its action.
In side the Method i am doing the following operations
1) Each employee id i am calling stored procedure and getting the employee object and adding to list of employees
looping through all the employeeId and contruction the list of all the employee objects
could you please suggest us the best way /Fastest way to retreive the employee details for more than 5000 employeeIds to implement the above operation
1) Can we use multithreading here? if possible give me an idea,
Thanks
Amar

Answer 1

You can try using a Table Value parameter to a Stored Procedure.
Basically:
Create a Stored Procedure that takes the list of CustomerID's as a Table Parameter.
Generate the Schemas using the WCF Adapter Wizard.
Map the request message of CustomerIDs to the SQL Request message.
In the Stored Procedure, select the customers by JOIN'ing to the Table Parameter.  In the SP, the Table Parameter will behave just like a physical table.
Return the result set of all customers in whatever format is you need.
This way, SQL Server is doing heavy data operation in one shot vs many individual queries.
Here's two articles that describe how to use Table Value Parameters:
http://msdn.microsoft.com/en-us/library/dd787869.aspx
http://connectedcircuits.wordpress.com/2011/08/17/using-sql2008-data-table-type-biztalk-to-insert-parent-child-rows/