Question

Is there a sane way to get a list of expected parameters from an SqlDataSource given the name of the stored procedure assigned to its SelectCommand property?

Answer 1

You can use the SqlCommandBuilder.DeriveParameters method to return information on the parameters associated with a stored procedure. Iterating over the collection will allow you to determine the parameter name, data type, direction, etc.

SqlCommand cmd = new SqlCommand(); SqlConnection conn = new SqlConnection('myConnectionString'); cmd.CommandType = CommandType.StoredProcedure; cmd.CommandText = 'myStoredProcName'; cmd.Connection = conn;  conn.Open(); SqlCommandBuilder.DeriveParameters(cmd); conn.Close();  SqlParameterCollection collection = cmd.Parameters; 

Take a look at the SqlParameterCollection and SqlParameter class definitions for more information.