嘿，我之前用Caliburn.Micro重构过类似的WinForms转WPF的项目，刚好碰到过这个保存后刷新DataGrid的问题，给你几个实用的解决方案：

1. 用ObservableCollection绑定DataGrid（基础核心） #

首先，你的ViewModel里用来绑定DataGrid的集合必须用ObservableCollection，而不是普通的List。因为ObservableCollection自带集合变更通知，当你添加、删除或者替换整个集合时，UI会自动感知并刷新。

结合Caliburn.Micro的PropertyChangedBase（ViewModel建议继承这个，或者Screen），代码可以这么写：

using Caliburn.Micro;
using System.Collections.ObjectModel;

public class MainViewModel : PropertyChangedBase
{
    private readonly IGameRepository _gameRepository; // 假设你有数据仓储类
    private ObservableCollection<GameModel> _games;

    public ObservableCollection<GameModel> Games
    {
        get => _games;
        set => Set(ref _games, value); // Caliburn的Set方法自动触发PropertyChanged事件
    }

    public MainViewModel(IGameRepository gameRepository)
    {
        _gameRepository = gameRepository;
        LoadGames(); // 初始化加载数据
    }

    private async void LoadGames()
    {
        var games = await _gameRepository.GetAllAsync();
        Games = new ObservableCollection<GameModel>(games);
    }
}

2. 保存后直接更新集合（最简单的同步方式） #

当你完成数据库保存操作后，只需要重新从数据库拉取最新数据，然后替换掉ViewModel里的Games集合即可——因为我们用了Set方法，它会自动触发UI更新。

示例保存方法：

public async Task SaveGame(GameModel gameToSave)
{
    // 执行数据库保存逻辑
    await _gameRepository.SaveOrUpdateAsync(gameToSave);
    
    // 重新加载最新数据并更新集合
    var latestGames = await _gameRepository.GetAllAsync();
    Games = new ObservableCollection<GameModel>(latestGames);
}

3. 确保GameModel实现属性变更通知（针对单条数据修改） #

如果你的场景是修改DataGrid里的某一行数据（比如直接在DataGrid里编辑GameName），想要实时刷新该行的显示，那你的GameModel也需要实现INotifyPropertyChanged。最方便的是直接继承Caliburn.Micro的PropertyChangedBase：

using Caliburn.Micro;

public class GameModel : PropertyChangedBase
{
    private int _gameID;
    public int GameID
    {
        get => _gameID;
        set => Set(ref _gameID, value);
    }

    private string _gameName;
    public string GameName
    {
        get => _gameName;
        set => Set(ref _gameName, value);
    }

    private string _gameCategory;
    public string GameCategory
    {
        get => _gameCategory;
        set => Set(ref _gameCategory, value);
    }

    private string _gameCompany;
    public string GameCompany
    {
        get => _gameCompany;
        set => Set(ref _gameCompany, value);
    }

    private decimal _gamePrice;
    public decimal GamePrice
    {
        get => _gamePrice;
        set => Set(ref _gamePrice, value);
    }
}

4. 用EventAggregator实现跨ViewModel刷新（解耦场景） #

如果你的保存操作是在另一个ViewModel里（比如弹出的编辑窗口），不想直接引用主ViewModel，那可以用Caliburn.Micro自带的EventAggregator来解耦：

第一步：定义事件类 #

public class GameSavedEvent
{
    // 可以按需添加属性，比如区分是新增还是修改
    public bool IsNewGame { get; set; }
}

第二步：在保存ViewModel里发布事件 #

using Caliburn.Micro;

public class EditGameViewModel : Screen
{
    private readonly IEventAggregator _eventAggregator;
    private readonly IGameRepository _gameRepository;
    public GameModel CurrentGame { get; set; }

    public EditGameViewModel(IEventAggregator eventAggregator, IGameRepository gameRepository)
    {
        _eventAggregator = eventAggregator;
        _gameRepository = gameRepository;
    }

    public async Task Save()
    {
        await _gameRepository.SaveOrUpdateAsync(CurrentGame);
        // 发布保存完成事件到UI线程
        await _eventAggregator.PublishOnUIThreadAsync(new GameSavedEvent { IsNewGame = CurrentGame.GameID == 0 });
        // 关闭窗口
        await TryCloseAsync(true);
    }
}

第三步：在主ViewModel里订阅事件并刷新 #

using Caliburn.Micro;
using System;

public class MainViewModel : PropertyChangedBase, IHandle<GameSavedEvent>
{
    private readonly IEventAggregator _eventAggregator;
    private readonly IGameRepository _gameRepository;
    private IDisposable _eventSubscription;

    public ObservableCollection<GameModel> Games { get; set; }

    public MainViewModel(IEventAggregator eventAggregator, IGameRepository gameRepository)
    {
        _eventAggregator = eventAggregator;
        _gameRepository = gameRepository;
        // 订阅事件（指定UI线程处理）
        _eventSubscription = _eventAggregator.SubscribeOnUIThread(this);
        LoadGames();
    }

    private async void LoadGames()
    {
        var games = await _gameRepository.GetAllAsync();
        Games = new ObservableCollection<GameModel>(games);
    }

    // 处理保存完成事件的方法，Caliburn会自动匹配
    public async Task HandleAsync(GameSavedEvent message)
    {
        // 重新加载数据刷新DataGrid
        var latestGames = await _gameRepository.GetAllAsync();
        Games = new ObservableCollection<GameModel>(latestGames);
    }

    // 记得在ViewModel销毁时取消订阅，避免内存泄漏
    protected override void OnDeactivate(bool close)
    {
        _eventSubscription?.Dispose();
        base.OnDeactivate(close);
    }
}

这些方案里，前两种是最常用的，简单直接；如果涉及多ViewModel交互，用EventAggregator会更优雅。根据你的实际场景选就行~

内容的提问来源于stack exchange，提问作者Infii