Need help in VS 2010 LightSwitch

I am using VS 2010 LightSwitch in my application and want to apply filter using Preprocess query on some condition basis.

Like, i want to pass a global variable to that preprocess query to apply filter.

Code in Application.cs 

 public partial class Application
    {

        public static string  filterType;
    }

Code in ApplicationDataService.cs

 partial void EmployeesSet_All_PreprocessQuery(ref IQueryable<Employees> query)
        {

string filterType = this.Application.filterType; //// THIS LINE IS GIVING ERROR. But this is possible in code behind of screen. Any different approx to access global variable?

            if (filterType == "Name")
            {
                query = query.OrderBy(t => t.Name);
            }
            else
            {
                query = query.Where(t => (t.Age < 28));
            }
        }

 

But, I am not able to access global variable filtertype from table code ApplicationDataService.cs.

Please suggest any way to implement this.

SOLUTION 1:

Please checkhttp://blogs.msdn.com/b/lightswitch/archive/2010/09/16/how-do-i-create-and-use-global-values-in-a-query-eric-erhardt.aspx

 

Go through “Defining Global Variable” Section.