将对象列表从视图传递到控制器错误？

Question

以下是我的ondemand Feed模型代码

public class OndemandFeedModel
{
    public CountryModel Country { get; set; }
    public FieldSelectModel Fields { get; set; }
    public FilterSelectModel Filters { get; set; }
}


 public class FieldSelectModel
    {
    public List<FieldGroup> FieldGroup { get; set; }
   }


 public class FieldGroup
 {
    public string GroupName { get; set; }
    public List<FieldModel> Fields { get; set; }
}

public class FieldModel
{
    public bool IsSelected { get; set; }
    public int FieldId { get; set; }
    public string FieldName { get; set; }
    public string UserDefinedFieldName { get; set; }
    public string FieldGroup { get; set; }
    public string Country { get; set; }

}

当我点击Httppost时会出现以下错误

我不知道出了什么问题。任何人都可以帮助我

Answer 1

我想您需要查看Request.Form.AllKeys才能看到发布的内容。

您的HTML输入字段应映射模型对象图的分层命名，否则模型绑定器不会将其绑定到模型。

此外，首先，在发布集合时，您可以发布隐藏的集合的起始索引（如果它不是0）。

Answer 2

如上所述，代码[HttpPost]不应与Index方法集成 因为Index方法应始终[httpGet]否则会产生404错误。在页面加载时，它总是给出如上所述的空值。 您可以从以下示例中获取帮助：

interface IProductRepository
{
IEnumerable<Product> GetAll();
}

public class Product
{
    [Display(Name = "Product ID")]
    public int ID { get; set; }

    [Display(Name = "Product Name")]
    public string Name { get; set; }

    [Display(Name = "Product Category")]
    public string Category { get; set; }

    [Display(Name = "Product Price")]
    public decimal Price { get; set; }
}

public class ProductRepository 
{
    private List<Product> products = new List<Product>();

    public ProductRepository()
    {
        products.Add(new Product { ID = 1, Name = "xyz", Category = "Cat A", Price = 1 });
        products.Add(new Product { ID = 2, Name = "xyz", Category = "Cat B", Price = 100 });
        products.Add(new Product { ID = 3, Name = "xyz", Category = "Cat C", Price = 1000 });
        products.Add(new Product { ID = 4, Name = "xyz", Category = "Cat D", Price = 10000 });
    }

    public IEnumerable<Product> GetAll()
    {
        return products;
    }        

}

    public ActionResult Index(Product model)
    {   
        repository.GetAll();
        //put foreach() here...
        return View();
    }