SunlightAggregationTerminal/InfoChemicalStatistics.xaml.cs

using SunlightAggregationTerminal.Class;
using SunlightAggregationTerminal.Models;
using System.Collections.ObjectModel;
using System.Reflection;
using System.Text.Json;
using TouchSocket.Core;

namespace SunlightAggregationTerminal;

public partial class InfoChemicalStatistics : ContentPage
{    
    public class ChemicalTotal
{
    public string? ProductName { get; set; }
    public string? ProductCode { get; set; }
    public float? TotalDispenseGrams { get; set; }
}

    public static ObservableCollection<ChemicalTotal> ChemicalTotals { get; set; } = new();
    public InfoChemicalStatistics()
	{
		InitializeComponent();
        Dictionary<string, object> Dictionary = new Dictionary<string, object>();
        Dictionary.Add("Command", "ChemicalStatistics");
        Total_Command(Dictionary.ToJsonString());
    }

    public async void Total_Command(string dat)
    {
        LoadingIndicator.IsVisible = true;
        ChemicalTotals.Clear();

        DataReceived.Transmit(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 (ChemicalTotals.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);
        CardCollectionView.ItemsSource = ChemicalTotals;

        LoadingIndicator.IsVisible = false;
    }
    public static void Total_data(string dat)
    {       
        try
        {
            var data = JsonSerializer.Deserialize<List<ChemicalTotal>>(dat);

            if (data != null)
            {
                foreach (var item in data)
                {
                    item.TotalDispenseGrams = MathF.Round((float)item.TotalDispenseGrams! / 1000, 5);

                    ChemicalTotals.Add(item);
                }                
            }
        }
        catch (Exception)
        {
        }
    }
}