shgxtzcjhoudaosaomadayinwpf/linesider_screen_bankend/Modules/linesider_screen_bankend.Modules.ModuleName/ViewModels/CommonLogViewModel.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using linesider_screen_bankend.Core.Mvvm;
using linesider_screen_bankend.Modules.ModuleName.Event;
using linesider_screen_bankend.Services.Interfaces;
using Prism.Events;
using Prism.Regions;

namespace linesider_screen_bankend.Modules.ModuleName.ViewModels
{
    public class CommonLogViewModel : RegionViewModelBase
    {
        private readonly IEventAggregator _eventAggregator;
        private SubscriptionToken _token;
        private ILogService _logService;



        private string _logMessage;
        public string LogMessage
        {
            get { return _logMessage; }
            set { SetProperty(ref _logMessage, value); }
        }
        public CommonLogViewModel(IRegionManager regionManager,
                           ILogService logService,
                           IEventAggregator eventAggregator) : base(regionManager)
        {
            _eventAggregator = eventAggregator;

            // 订阅事件，使用UI线程处理，保持强引用
            _token = _eventAggregator.GetEvent<CommonLogEvent>()
            .Subscribe(OnLogReceived, ThreadOption.UIThread, true);


            LogMessage = logService.GetInitMessage();
            _logService = logService;
        }

        private void OnLogReceived(string message)
        {
            LogMessage += $"{DateTime.Now}: {message}\n";
            _logService.AddMessage(message); // 使用日志服务记录
        }

        public void Destroy()
        {
            _token?.Dispose();
        }

        public void AddLogMessage()
        {
            _logService.AddMessage("123");
        }
        public override void OnNavigatedTo(NavigationContext navigationContext)
        {
            //do something
        }
    }
}