好的,所以我有了我的ViewModel并且我理解了控制器的作用,我只是在实现它时遇到了困难。我不知道如何为ViewModel编写控制器代码,我自己尝试过研究它并且找不到任何东西。
这是我的viewModel,我将如何构建控制器?不要求你为我做,只是如何做到这一点
public class ViewOrderViewModel
{
//From ORDER Table
public int OrderId { get; set; }
public System.DateTime OrderDate { get; set; }
public string FirstName { get; set; }
public string LastName { get; set; }
public string Address { get; set; }
public string City { get; set; }
public string PostalCode { get; set; }
public string Country { get; set; }
public string Email { get; set; }
public decimal Total { get; set; }
//from Products
public List<Product> Products { get; set; }
}
更新
public class ViewOrderController : Controller
{
// GET: ViewOrder
public ActionResult ViewOrders()
{
var order = new Order();
var viewModel = GetViewModel(order);
return View(viewModel);
}
public ViewOrderViewModel GetViewModel(Order orderObject)
{
ViewOrderViewModel viewModel = new ViewOrderViewModel();
viewModel.OrderId = orderObject.OrderId;
viewModel.OrderDate = orderObject.OrderDate;
viewModel.FirstName = orderObject.FirstName;
viewModel.LastName = orderObject.LastName;
viewModel.City = orderObject.City;
viewModel.Address = orderObject.Address;
viewModel.Country = orderObject.Country;
viewModel.Email = orderObject.Email;
viewModel.PostalCode = orderObject.PostalCode;
viewModel.Total = orderObject.Total;
return viewModel;
}
}
仍然不确定如何将ViewModel类中的产品列表映射到db中的产品列表
答案 0 :(得分:2)
通常,您的视图将“绑定”到ViewModel。这就像说“好吧,我是'订单'的视图,我只需要担心你在ViewOrderViewModel中定义的属性。”
该绑定不需要控制器。绑定在视图的顶部声明:
<强> Order.cshtml 强>
@Model MyProject.Web.ViewModels.ViewOrderViewModel
<div>
<!-- Html for the view-->
</div>
这允许您在视图中访问该模型的属性。剃刀具有一些让生活变得轻松的功能。例如,如果要显示OrderId,它可能如下所示:
<span>OrderId: @Model.OrderId </span>
视图不关心为每个属性设置的值,它只关心属性是否存在。控制器进入游戏的位置是使用您想要的值填充这些属性,然后将ViewModel传递给视图:
public ActionResult Order()
{
var viewModel = new ViewOrderViewModel();
// Load data into each property
viewModel.OrderId = 123; // etc..
// Return it to the view. Asp.net knows to return
// it to the Order.cshtml view because the view
// and the controller action share the same name.
return View(viewModel);
}
编辑:在评论中回答您的问题:如果您需要使用来自不同模型(例如数据库模型)的值填充ViewModel,您可以创建一个映射器,如下所示: / p>
public ViewOrderViewModel GetViewModel(Order orderObject)
{
ViewOrderViewModel viewModel = new ViewOrderViewModel();
viewModel.OrderId = orderObject.OrderId;
viewModel.FirstName = orderObject.FirstName;
// etc...
return viewModel;
}
然后在你的控制器中你会做这样的事情:
// var order = new Order()
var viewModel = GetViewModel(order);