SunlightAggregationTerminal/NotificationPage.xaml.cs

using SunlightAggregationTerminal.Models;
using System.Data;
using System.Linq;

namespace SunlightAggregationTerminal;

public partial class NotificationPage : ContentPage
{
    public NotificationItem NoticeItem { get; set; } = new NotificationItem();
    public NotificationItem MessageItem { get; set; } = new NotificationItem();
    public NotificationItem SystemItem { get; set; } = new NotificationItem();

    public NotificationPage()
	{
		InitializeComponent();     
        this.BindingContext = this; 
    }

    private void ContentPage_Loaded(object sender, EventArgs e)
    {
        LoadSummaryData();
    }

    private void LoadSummaryData()
    {
       var allItems = DataService.GetAllItems();

        // 筛选出 Type 为 Notice 的数据，并取第一条
        // 对应 DataTable 的 Select("Type = ...").First()
        var noticeItem = allItems.FirstOrDefault(x => x.Type == MsgType.Notice);

        // 读取数据 (注意判空，防止找不到数据时报错)
        if (noticeItem != null)
        {
            NoticeItemTitle.Text = noticeItem.Title;
            NoticeItemContent.Text = noticeItem.Content;
        }
        else
        {
            // 处理没有找到数据的情况
            NoticeItemTitle.Text = "暂无通知";
            NoticeItemContent.Text = "通知";
        }

        var messageItem = allItems.FirstOrDefault(x => x.Type == MsgType.Message);

        // 读取数据 (注意判空，防止找不到数据时报错)
        if (messageItem != null)
        {
            MessageItemTitle.Text = messageItem.Title;
            MessageItemContent.Text = messageItem.Content;
        }
        else
        {
            // 处理没有找到数据的情况
            MessageItemTitle.Text = "暂无通知";
            MessageItemContent.Text = "信息";
        }
        var systemItem = allItems.FirstOrDefault(x => x.Type == MsgType.System);

        // 读取数据 (注意判空，防止找不到数据时报错)
        if (systemItem != null)
        {
            SystemItemTitle.Text = systemItem.Title;
            SystemItemContent.Text = systemItem.Content;
        }
        else
        {
            // 处理没有找到数据的情况
            SystemItemTitle.Text = "暂无通知";
            SystemItemContent.Text = "系统信息";
        }

    }

    // 点击跳转到独立页面
   private async void OnNoticeTapped(object sender, TappedEventArgs e)
    {
        await Navigation.PushAsync(new NotificationView.NoticePage());
    }

    private async void OnMessageTapped(object sender, TappedEventArgs e)
    {
        await Navigation.PushAsync(new NotificationView.MessagePage());
    }

    private async void OnSystemTapped(object sender, TappedEventArgs e)
    {
        await Navigation.PushAsync(new NotificationView.SystemPage());
    }


}