Grid View binding using Stored Procedure and flags in 3 tier

bal
public DataSet Fetch()
   {
       edal.connection();
       edal.sc.Open();
       ds = edal.Fill();
       edal.sc.Close();
       return ds;
   }

dal
public DataSet Fill()
    {
        SqlDataAdapter da = new SqlDataAdapter("masteriud", sc);
        da.SelectCommand.CommandType = CommandType.StoredProcedure;
        //SqlParameter param = new SqlParameter("@flag", 2);
        da.SelectCommand.Parameters.Add(new SqlParameter("@flag", SqlDbType.Int));
        da.SelectCommand.Parameters["@flag"].Value = 2;
        ds = new DataSet();
        da.Fill(ds);
        return ds;
    }
ui
    public void fill()
    {
        ds = ebal.Fetch();
        GridView1.DataSource = ds;
        GridView1.DataBind();
    }

alter procedure masteriud(@Id int,@Name varchar(50),@Address varchar(50),@flag int)
as
begin
if @flag='1'
begin
insert into Memployee(Id,Name,Address)values(@Id,@Name,@Address)
end

if @flag='2'
begin
select * from Memployee
end