SunlightAggregationTerminal/QueryPage.xaml.cs

using CommunityToolkit.Mvvm.Messaging;
using SunlightAggregationTerminal.Class;
using SunlightAggregationTerminal.Models;
using System.Collections.ObjectModel;
using System.Text.Json;
using static SunlightAggregationTerminal.QueryPage;

namespace SunlightAggregationTerminal;

public partial class QueryPage : ContentPage
{
    public static  ObservableCollection<DyelotItem> DyelotItems { get; set; } = new();

    public QueryPage()
    {
        InitializeComponent();

        WeakReferenceMessenger.Default.Register<string>(this, (r, scannedValue) =>            
        {             
            ResultEntry.Text = scannedValue;       
        });
    }
    private async void OnScanButtonClicked(object sender, EventArgs e)
    {
        // 跳转到扫码页面
        await Navigation.PushAsync(new ScanPage(0));
    }

    private void TapGestureRecognizer_Tapped(object sender, TappedEventArgs e)
    {

    }

    //信息回复
    public static void Query_data(string dat)
    {
        try
        {
            var data = JsonSerializer.Deserialize<List<DyelotItem>>(dat);

            if (data != null)
            {
                foreach (var item in data)
                {
                    DyelotItems.Add(item);
                }
            }
        }
        catch (Exception) { }
    }

    public async void Query_Command(string dat)
    {
        LoadingIndicator.IsVisible = true;
        DyelotItems.Clear();

        TcpServer.TcpTransmit(dat);

        // 创建一个 15 秒的延时任务
        Task delayTask = Task.Delay(15000);
        // 创建一个监测任务，不断检查变量
        Task monitorTask = Task.Run(async () =>
        {
            while (DyelotItems.Count==0)
            {
                // 每隔 100 毫秒检查一次，避免 CPU 占用过高
                await Task.Delay(100);
            }
        });
        // 使用 Task.WhenAny 等待任意一个任务完成
        await Task.WhenAny(delayTask, monitorTask);

        LoadingIndicator.IsVisible = false;
    }
    // 处理“回车/完成”按钮点击
    /* private void OnEntryCompleted()
     {
         string inputText = ResultEntry.Text;

         if (!string.IsNullOrWhiteSpace(inputText))
         {
             // 在这里处理用户手动输入的内容
             // 例如：验证格式、跳转页面、或者搜索商品
             //DisplayAlert("提示", $"你输入了: {inputText}", "确定");
         }
     }*/

}