SQL Query says a parameter is not supplied, but is added to the SqlCommand object

Question

I have a stored procedure that has a parameter called UserName and in my code behind I have a SqlCommand object that I add the parameters to with the Add method. But for som

Answer 1

Command1.CommandType = System.Data.CommandType.StoredProcedure

This will force the ExecuteReader to perform the exec instead of just trying it as a flat command.