SunlightAggregationTerminal/NotificationView/MessagePage.xaml.cs

using Microsoft.Maui.Controls.Shapes;
using SunlightAggregationTerminal.Models;
using System.Collections.ObjectModel;

namespace SunlightAggregationTerminal.NotificationView;

public partial class MessagePage : ContentPage
{
    public ObservableCollection<NotificationItem> MessageItems { get; set; } = new();

    public MessagePage()
	{
		InitializeComponent();
        this.BindingContext = this;
        LoadData(); // 加载数据
    }

    private void LoadData()
    {
        var allData = DataService._NotificationData;
        if (allData != null)
        {
            // 清空旧数据
            MessageItems.Clear();

            // 按时间倒序，并只取最新的 50 条
            var itemsToShow = allData.OrderByDescending(x => x.Time).Take(50).Where(x => x.Type == MsgType.Message);

            // 将数据添加到集合中，UI 会自动更新
            foreach (var item in itemsToShow)
            {
                MessageItems.Add(item);
            }
        }
    }

    private void CardCollectionView_RemainingItemsThresholdReached(object sender, EventArgs e)
    {

    }
}