WPF 医疗排队系统：输入框回车查询功能优化

private void OnPreviewTextInput(object sender, TextCompositionEventArgs e) { /* if (e.Text == '\r') { }*/ Console.WriteLine('输入的：' + e.Text); OnPreviewKeyDown(sender, new KeyEventArgs(Keyboard.PrimaryDevice, PresentationSource.FromVisual((Visual)sender), 0, Key.Enter));

    }


    //快捷键结束

    //在输入框回车后调此方法
    private void OnPreviewKeyDown(object sender, KeyEventArgs e)
    {
        if (e.Key == Key.Enter)
        {
            string inputText = inputBox.Text;
            Console.WriteLine('就诊卡号：' + inputText);
            DataGrid2.Visibility = Visibility.Hidden;
            DataGrid3.Visibility = Visibility.Hidden;

            DataGrid1.Visibility = Visibility.Visible;

            this.Height = 500;
            query_type = 1;
            String doctor_code = new Config().getDoctorCode();
            String select_is_expert = ((ComboBoxItem)queue_type_v.SelectedItem).DataContext.ToString();
            String select_dept_room_id = cmbBudgetYear.SelectedValue.ToString();
            //String result = HttpRequestHelper.HttpGet(service_addreass + '/http-doctor-query-wait.html?doctor_code=' + doctor_code + '&ip=' + client_ip + '&is_expert=' + select_is_expert + '&dept_room_id=' + select_dept_room_id);
            String result = HttpRequestHelper.HttpGet(service_addreass + '/http-this-doctor-query-wait-input.html?doctor_code=' + doctor_code + '&ip=' + client_ip + '&is_expert=' + select_is_expert + '&dept_room_id=' + select_dept_room_id + '&inputText=' + inputText);
            JObject jsonObj = JObject.Parse(result);
            String code = jsonObj['code'].ToString();
            String message = jsonObj['message'].ToString().Substring(1, jsonObj['message'].ToString().Length - 2); ;
            if (code.Equals('0'))
            {
                MessageBox.Show(message, '错误提示', MessageBoxButton.YesNo, MessageBoxImage.Warning, MessageBoxResult.No);
            }
            else
            {
                int queues_length = int.Parse(jsonObj['queues_length'].ToString());
                current_visit_count_v.Text = '等待（' + queues_length + '）';
                DataGrid1.ItemsSource = null;
                if (queues_length > 0)
                {
                    this.DataGrid1.ItemsSource = getAll(queues_length, jsonObj);
                }
                wait_patient_number = queues_length;

            }
        }
    }

    private DispatcherTimer inputTimer;

    public MainWindow()
    {
        InitializeComponent();
        inputTimer = new DispatcherTimer();
        inputTimer.Interval = TimeSpan.FromSeconds(1);
        inputTimer.Tick += InputTimer_Tick;
    }

    private void InputBox_TextChanged(object sender, TextChangedEventArgs e)
    {
        inputTimer.Stop();
        inputTimer.Start();
    }

    private void InputTimer_Tick(object sender, EventArgs e)
    {
        inputTimer.Stop();
        string inputText = inputBox.Text;
        if(!string.IsNullOrEmpty(inputText))
        {
            //执行查询方法
            //...
        }
    }