我正在尝试编辑记录。我有默认路线。
当我单击提交按钮时,UpdateModel 行出现异常:
无法更新“MyProject.Mvc.Models.Product”类型的模型。
在页面上 ProductId 字段的验证提示 value is invalid:
The value '9' is invalid. 9 是我要编辑的记录的 ID。有什么问题?
public ActionResult Edit(int id)
{
Product product = productRepository.GetProduct(id);
return View(new ProductFormViewModel(product));
}
[HttpPost]
public ActionResult Edit(int id, FormCollection productFormViewModel)
{
Product product = productRepository.GetProduct(id);
try
{
// TODO: Add update logic here
UpdateModel(product, "Product");
productRepository.Save();
return RedirectToAction("Index");
}
catch (Exception ex)
{
return View(new ProductFormViewModel(product));
}
}
如果我将更新模型行更改为:
UpdateModel(product);
然后不会抛出异常并且数据库中的数据不会更新。
[编辑]
我正在使用实体框架
namespace MyProject.Mvc.Models
{
[MetadataType(typeof(ProductMetaData))]
public partial class Product
{
public Product()
{
// Initialize Product
this.CreateDate = System.DateTime.Now;
}
}
public class ProductMetaData
{
[Required(ErrorMessage = "Product name is required")]
[StringLength(50, ErrorMessage = "Product name must be under 50 characters")]
public object ProductName { get; set; }
[Required(ErrorMessage = "Description is required")]
public object Description { get; set; }
}
public class ProductFormViewModel
{
public Product Product { get; private set; }
public ProductFormViewModel()
{
Product = new Product();
}
public ProductFormViewModel(Product product)
{
Product = product;
}
}
}