將視圖中的對象列表傳遞給控制器​​錯誤？

Question

大家好以下是我的按需飼料型號代碼

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; } 

} 

，當我打Httppost它會給以下錯誤

我不知道錯在哪裏。任何人都可以幫我

Answer 1

我想你需要看Request.Form.AllKeys看看發佈了什麼。

您的HTML輸入字段應該映射模型對象圖的分層命名，或者模型綁定器不會將其綁定到模型。

另外，作爲開始，發佈集合時，您可以發佈隱藏集合的開始索引（如果它不是0）。

Answer 2

根據上面的代碼[HttpPost]不應該與索引方法 集成，因爲索引方法應該總是[httpGet]否則它會給404錯誤。在頁面加載時，它總是提供空值，如前所述。 你可以從下面的例子中獲得幫助：

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(); 
    }