C# - Filter Sql Server Table Rows Using Many Filters

I have a table called Student with a lot foreign keys that will be used after to filter students(table rows).The structure of this table is like:

StudentId GenderId DegreeId NatioanlityId
1 2 2 3
....

As a student can speak one or more language,the Sudent Table is linked to language table like this

StudentId LangaugeId
1 1
1 2
1 3

And a student can chose one or many subjects for exam:

StudentId ExamId
1 1
1 2
....

In my asp.net page I would like to filter students via checkbox using ajax for example, student having female and male gender with Degree 1,speaking language 1,2... I filter rows in a stored proc using user defined table,and I have to use a lot of IF statements like this

if(EXISTS(SELECT GenderId FROM @GenderTable))
if(EXISTS(SELECT DegreeId FROM @DegreeTable))
if(....)
else
if(...)

How can I avoid all the IF statements? I have more than 5 filters.It's boring.