public DataSet ValidateLogin(string UserID, String Password) { DataSet ds = new DataSet(); helpus.OpenConnection(); SqlDataAdapter da; try { da = new SqlDataAdapter("sp_ValidUser", helpus.GetConnection); da.SelectCommand.CommandType = CommandType.StoredProcedure; if (UserID.ToString() == "") { da.SelectCommand.Parameters.Add("@userid", SqlDbType.VarChar).Value = DBNull.Value; } else { da.SelectCommand.Parameters.Add("@userid", SqlDbType.VarChar).Value = UserID.ToString(); } if (Password.ToString() == "") { da.SelectCommand.Parameters.Add("@password", SqlDbType.VarChar).Value = DBNull.Value; } else { da.SelectCommand.Parameters.Add("@password", SqlDbType.VarChar).Value = Password.ToString(); } da.Fill(ds); return(ds); } catch (Exception ex) { throw ex; } finally { helpus.CloseConnection(); } }