返回字符串与文本框文本不匹配

Question

我的程序中有一些代码，它们不允许和操作员启动另一批，直到他们完成它们所在的那个但仍然允许另一个操作员启动同一批次。 sqldatareader返回正确的数据，即17080387-002，但程序继续进行“请完成批处理”步骤。我正在试图弄清楚它是否可能与批次的返回方式有关。

public void BatchLockOut()
    {
        string eventID = null;
        string batchLock = null;
        string enteredLot = TextBoxLot.Text;
        string connectionString = "";
        string commandText = "SELECT BadgeNo, Container_ID, Event_ID, Event_Time " +
                               "FROM dbo.Custom_EventLog " +
                               "WHERE Event_Time IN (SELECT MAX(Event_Time) FROM dbo.Custom_EventLog WHERE BadgeNo = @BADGENO)";
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            using (SqlCommand command = new SqlCommand(commandText, connection))
            {
                command.Parameters.Add("@BADGENO", SqlDbType.NChar, 10).Value = TextBoxLogin.Text;
                SqlDataReader reader = command.ExecuteReader();
                while (reader.Read())
                {
                    eventID = Convert.ToInt32(reader["Event_ID"]).ToString();
                    batchLock = reader["Container_ID"] as string;
                    break;
                }
            }
            connection.Close();
        }
        if (batchLock == null)
        {
            ButtonBeginStir.IsEnabled = true;
        }
        else if (batchLock != enteredLot)
        {
            if (eventID == "1")
            {
                MessageBox.Show("Please finish previous stir", "Finish Stir", MessageBoxButton.OK, MessageBoxImage.Information);
                ClearForm();
            }
            else
            {
                ButtonBeginStir.IsEnabled = true;
            }
        }
        else if (batchLock == enteredLot)
        {
            if (eventID == "1")
            {
                ButtonEndStir.IsEnabled = true;
            }
            else if (eventID == "2")
            {
                ButtonBeginStir.IsEnabled = true;
            }
        }
    }