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DMS.WPF/Services/INavigatable.cs

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+// 文件: DMS.WPF/Services/INavigatable.cs
+namespace DMS.WPF.Services;
+
+/// <summary>
+/// 定义了一个契约，表示ViewModel可以安全地接收导航传入的参数。
+/// </summary>
+public interface INavigatable
+{
+    /// <summary>
+    /// 当导航到此ViewModel时，由导航服务调用此方法，以传递参数。
+    /// </summary>
+    /// <param name="parameter">从导航源传递过来的参数对象。</param>
+    Task OnNavigatedToAsync(object parameter);
+}

DMS.WPF/Services/INavigationService.cs

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+// 文件: DMS.WPF/Services/INavigationService.cs
+using System.Threading.Tasks;
+
+namespace DMS.WPF.Services;
+
+/// <summary>
+/// 定义了应用程序的导航服务接口。
+/// </summary>
+public interface INavigationService
+{
+    /// <summary>
+    /// 导航到由唯一键标识的视图，并传递一个参数。
+    /// </summary>
+    /// <param name="viewKey">在DI容器中注册的目标视图的唯一键（通常是ViewModel的名称）。</param>
+    /// <param name="parameter">要传递给目标ViewModel的参数。</param>
+    Task NavigateToAsync(string viewKey, object parameter = null);
+
+    /// <summary>
+    /// 显示主窗口。
+    /// </summary>
+    Task ShowMainWindowAsync();
+}

DMS.WPF/Services/NavigationService.cs

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+// 文件: DMS.WPF/Services/NavigationService.cs
+using DMS.WPF.ViewModels;
+using Microsoft.Extensions.DependencyInjection;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using DMS.ViewModels;
+
+namespace DMS.WPF.Services;
+
+/// <summary>
+/// INavigationService 的实现，负责解析ViewModel并处理参数传递。
+/// </summary>
+public class NavigationService : INavigationService
+{
+    private readonly IServiceProvider _serviceProvider;
+
+    /// <summary>
+    /// 构造函数。
+    /// </summary>
+    public NavigationService(IServiceProvider serviceProvider)
+    {
+        _serviceProvider = serviceProvider;
+    }
+
+    /// <summary>
+    /// 导航到指定键的视图，并传递参数。
+    /// </summary>
+    public async Task NavigateToAsync(string viewKey, object parameter = null)
+    {
+        if (string.IsNullOrEmpty(viewKey))
+        {
+            return;
+        }
+
+        var mainViewModel = _serviceProvider.GetRequiredService<MainViewModel>();
+        var viewModelType = GetViewModelTypeByKey(viewKey);
+        var viewModel = _serviceProvider.GetRequiredService(viewModelType) as ViewModelBase;
+
+        if (viewModel is INavigatable navigatableViewModel)
+        {
+            await navigatableViewModel.OnNavigatedToAsync(parameter);
+        }
+
+        mainViewModel.CurrentViewModel = viewModel;
+    }
+
+    /// <summary>
+    /// 显示主窗口。
+    /// </summary>
+    public Task ShowMainWindowAsync()
+    {
+        var mainWindow = _serviceProvider.GetRequiredService<MainWindow>();
+        mainWindow.Show();
+        return Task.CompletedTask;
+    }
+
+    private Type GetViewModelTypeByKey(string key)
+    {
+        return key switch
+        {
+            "HomeView" => typeof(HomeViewModel),
+            "DevicesView" => typeof(DevicesViewModel),
+            "DeviceDetailView" => typeof(DeviceDetailViewModel),
+            "VariableTableView" => typeof(VariableTableViewModel),
+            "MqttsView" => typeof(MqttsViewModel),
+            "MqttServerDetailView" => typeof(MqttServerDetailViewModel),
+            "SettingView" => typeof(SettingViewModel),
+            _ => throw new KeyNotFoundException($"未找到与键 '{key}' 关联的视图模型类型。请检查 NavigationService 的映射配置。")
+        };
+    }
+}