控制器ASP中的全局模型.. NET Core MVC 6

Question

我有Home/Index，其中显示当前任务列表，已完成任务和创建新任务的表单。

我创建了HomeIndexViewModel通过模型(完成的任务，当前任务和TaskCreateViewModel的形式)索引视图和那里调用(@Model。CompletedTasks, @ model。CurrentTasks和@Model.FormCreate)

但是在CreatedTaskViewModel中，我想获得有关验证错误的信息并在视图中渲染它们。I init in ControllerHomeIndexViewModel，并从Index(Action)和Create(Action)获得访问权限。

方法有效，但我不确定这是什么好主意。

public class HomeIndexViewModel
{
public List<TaskModel> CompletedTasks { get; set; } = new List<TaskModel>();
public List<TaskModel> CurrentTasks { get; set; } = new List<TaskModel>();
public CreateTaskViewModel FormCreate { get; set; } = new CreateTaskViewModel();
}

public class HomeController : Controller
{
private readonly ITaskRepository _taskRepository;
private HomeIndexViewModel homeIndexViewModel;
public HomeController(IConfiguration configuration)
{
_taskRepository = new TaskRepository(configuration.GetConnectionString("AppDB"));
homeIndexViewModel = new HomeIndexViewModel() 
{
CompletedTasks = _taskRepository.GetList("completed");
CurrentTasks = _taskRepository.GetList("current");
};
public ActionResult Index()
{
return View(homeIndexViewModel);
}
public ActionResult Create(CreateTaskViewModel task)
{
if (ModelState.IsValid)
{
_taskRepository.Create(task);
}
return View(nameof(Index), homeIndexViewModel);
}

Answer 1

我认为你可以写一个服务，并注入到你的控制器:

public interface ISomeService
{
public HomeIndexViewModel GetHomeIndexViewModel(IConfiguration configuration, ITaskRepository taskRepository)
{
//some codes
HomeIndexViewModel homeIndexView = new HomeIndexViewModel() 
{
//some codes
};
return homeIndexView;
}
}
public class SomeService : ISomeService
{
public HomeIndexViewModel GetHomeIndexViewModel(IConfiguration configuration, ITaskRepository taskRepository)
{
//some codes
HomeIndexViewModel homeIndexView = new HomeIndexViewModel()
{
//some codes
};
return homeIndexView;
}
}

在你的启动类:

public void ConfigureServices(IServiceCollection services)
{
.....
services.AddTransient<ISomeService, SomeService>();
.....
}

在你的控制器中:

public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
private readonly ISomeService _someService;
private readonly ITaskRepository _taskRepository;
private readonly IConfiguration _configuration;

public HomeController(ILogger<HomeController> logger, ISomeService someService, ITaskRepository taskRepository, IConfiguration configuration)
{
_logger = logger;
_someService = someService;
_taskRepository = taskRepository;
_configuration = configuration;
}

public IActionResult Index()
{
var homeindexviewmodel = _someService.GetHomeIndexViewModel(_configuration,_taskRepository);
//you could get the homeindexviewmodel in other controllers with the same method
return View();
}
}