How Multiple Values pass of checkbox in single parameter using stored procedure

Dear brother,

I am a Novice programmer. I want to develop multipule checked.  

  I pass values using the IN clause into Store Procedure. I get these values by selecting checkboxes.

I get the checkboxes by using a foreach loop and  produces a string like "001, 002,003" .

By passing that string into the stored procedure, the string gets wrapped in quotes. The problem is, that stored procedures doesn't accept those double quotes in the IN clause.

How do I do this correctly?