使用@Html.DropDownListFor

Question

我在控制器中创建了对象列表，并且我想在DropDownList中显示其中一个属性。这是我的控制器：

public class HomeController : Controller
    {
        public ActionResult Index()
        {
            List<Product> product = new List<Product>();

            product.Add(new Product() { ProductId = 1, Name = "apple", Price = 1.09 });
            product.Add(new Product() { ProductId = 2, Name = "peach", Price = 1.57 });
            product.Add(new Product() { ProductId = 3, Name = "banana", Price = 1.15 });
            product.Add(new Product() { ProductId = 4, Name = "watermelon", Price = 4.50 });
            product.Add(new Product() { ProductId = 5, Name = "melon", Price = 5.06 });
            product.Add(new Product() { ProductId = 6, Name = "strawberries", Price = 6.99 });
            product.Add(new Product() { ProductId = 7, Name = "raspberries", Price = 2.20 });

            return View(product);
        }
    }

我尝试在下面的视图中使用它，但它返回false。如何使用helper @Html.DropDownListFor？

@foreach(var name in Model.Name)
    { 
        @Html.DropDownListFor(name.Name ,name.ToString())
    }

Answer 1

我假设Product类如下所示：

public class Product
{
    public int ProductId { get; set; }
    public string Name { get; set; }
    public double Price { get; set; }
}

假设您有以下模型：

public class ProductModel 
{
   public int MyProductId { get; set; }
}

最后，您已经创建了产品列表(如您所示)

List<Product> product = new List<Product>();

            produkt.Add(new Product() { ProductId = 1, Name = "apple", Price = 1.09 });
            produkt.Add(new Product() { ProductId = 2, Name = "peach", Price = 1.57 });
            produkt.Add(new Product() { ProductId = 3, Name = "banana", Price = 1.15 });
            produkt.Add(new Product() { ProductId = 4, Name = "watermelon", Price = 4.50 });
            produkt.Add(new Product() { ProductId = 5, Name = "melon", Price = 5.06 });
            produkt.Add(new Product() { ProductId = 6, Name = "strawberries", Price = 6.99 });
            produkt.Add(new Product() { ProductId = 7, Name = "raspberries", Price = 2.20 });

在视图中，您可以创建一个下拉列表，如下所示：

@model ProductModel

@Html.DropDownListFor(n => n.MyProductId, 
                         new SelectList(product, "ProductId", "Name"))

有关更多信息，请访问this article

Answer 2

试一试:)

@model App.Models.Model

@Html.DropDownListFor(x => x.ProductId, new SelectList(Product, "Name", "Price"))