我有一个视图模型,它包含一个产品类类型和一个IEnumerable&产品>类型.在发布后,第一级产品对象从视图模型返回绑定,而产品枚举将返回null.
为什么IEnumerable<选取产品>属性没有被绑定到我的视图模型的每个帖子？谢谢！ 楷模：
public class Product
{
public int ID { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
}
public class ProductIndexviewmodel
{
public Product NewProduct { get; set; }
public IEnumerable<Product> Products { get; set; }
}
public class BoringStoreContext
{
public BoringStoreContext()
{
Products = new List<Product>();
Products.Add(new Product() { ID = 1,Name = "Sure",Price = (decimal)(1.10) });
Products.Add(new Product() { ID = 2,Name = "Sure2",Price = (decimal)(2.10) });
}
public List<Product> Products {get; set;}
}
视图：
@model ProductIndexviewmodel @using (@Html.BeginForm()) { <div> @Html.LabelFor(model => model.NewProduct.Name) @Html.EditorFor(model => model.NewProduct.Name) </div> <div> @Html.LabelFor(model => model.NewProduct.Price) @Html.EditorFor(model => model.NewProduct.Price) </div> <div> <input type="submit" value="Add Product" /> </div> foreach (var item in Model.Products) { <div> @Html.LabelFor(model => item.ID) @Html.EditorFor(model => item.ID) </div> <div> @Html.LabelFor(model => item.Name) @Html.EditorFor(model => item.Name) </div> <div> @Html.LabelFor(model => item.Price) @Html.EditorFor(model => item.Price) </div> } }
控制器：
public class HomeController : Controller
{
BoringStoreContext db = new BoringStoreContext();
public ActionResult Index()
{
ProductIndexviewmodel viewmodel = new ProductIndexviewmodel
{
NewProduct = new Product(),Products = db.Products
};
return View(viewmodel);
}
[HttpPost]
public ActionResult Index(ProductIndexviewmodel viewmodel)
{
// ???? viewmodel.Products is NULL here
// ???? viewmodel.NewProduct comes back fine
return View();
}
解决方法
你没有正确使用你的lambda表达式.您需要通过模型访问“产品”列表.尝试这样做：
@count = 0
foreach (var item in Model.Products)
{
<div>
@Html.LabelFor(model => model.Products[count].ID)
@Html.EditorFor(model => model.Products[count].ID)
</div>
<div>
@Html.LabelFor(model => model.Products[count].Name)
@Html.EditorFor(model => model.Products[count].Name)
</div>
<div>
@Html.LabelFor(model => model.Products[count].Price)
@Html.EditorFor(model => model.Products[count].Price)
</div>
@count++
}
编辑
控制器：
BoringStoreContext db = new BoringStoreContext();
public ActionResult Index()
{
ProductIndexviewmodel viewmodel = new ProductIndexviewmodel
{
NewProduct = new Product(),Products = db.Products
};
return View(viewmodel);
}
[HttpPost]
public ActionResult Index(ProductIndexviewmodel viewmodel)
{
// work with view model
return View();
}
模型
public class Product
{
public int ID { get; set; }
public string Name { get; set; }
public decimal Price { get; set; }
}
public class ProductIndexviewmodel
{
public Product NewProduct { get; set; }
public List<Product> Products { get; set; }
}
public class BoringStoreContext
{
public BoringStoreContext()
{
Products = new List<Product>();
Products.Add(new Product() { ID = 1,Price = (decimal)(1.10) });
Products.Add(new Product() { ID = 2,Price = (decimal)(2.10) });
}
public List<Product> Products { get; set; }
}
视图：
@model Models.ProductIndexviewmodel @using (@Html.BeginForm()) { <div> @Html.LabelFor(model => model.NewProduct.Name) @Html.EditorFor(model => model.NewProduct.Name) </div> <div> @Html.LabelFor(model => model.NewProduct.Price) @Html.EditorFor(model => model.NewProduct.Price) </div> for (int count = 0; count < Model.Products.Count; count++ ) { <div> @Html.LabelFor(model => model.Products[count].ID) @Html.EditorFor(model => model.Products[count].ID) </div> <div> @Html.LabelFor(model => model.Products[count].Name) @Html.EditorFor(model => model.Products[count].Name) </div> <div> @Html.LabelFor(model => model.Products[count].Price) @Html.EditorFor(model => model.Products[count].Price) </div> } <div> <input type="submit" value="Add Product" /> </div> }
