使用@ Html.DropDownListFor

Question

我在控制器中創建了對象列表，我想在DropDownList中顯示其中一個屬性。這是我的控制器：

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); 
     } 
    } 

我嘗試將它用於我的View下面，但它返回false。我如何使用helper @ Html.DropDownListFor？

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

Answer 1

給這個一去:)

@model App.Models.Model 

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

Answer 2

我假設，對於產品類的樣子：

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

讓我們說，你有以下型號：

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

最後你已經創建d。在你看來，你可以創建一個下拉列表，像這樣的產品列表（像你證明）

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 }); 

：

@model ProductModel 

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

欲瞭解更多信息，你可以看看this article