C# 如何从编辑视图ASP.NET MVC更新两个表？

我试图更新两个表中的数据<代码>产品和

库存

。表

products

的主键是

cod\u prod

，它是产品的条形码。这是与

产品

表和其他表的关系。对所有字段执行更新，但在数据库管理员中，

inventory

表中的

cod\u prod

字段未更新，它仅变为

null

，在

products

表中执行更新，

reg\u date

字段，也会更新

库存

表中的字段。只有

inventory

表上的

cod\u prod

字段没有更新，我不知道为什么

视图模型：

public class products
{

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

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

   [Display(Name = "Register Date")]
   [DataType(DataType.Date)]
   [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy}")]
   public DateTime? reg_date { get; set; }
}

控制器：

[HttpGet]
public ActionResult prodEdit(int id)
{
    using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
    {
        var u = dc.products.Where(a => a.id == id).FirstOrDefault();
        if (u != null)
        {
            var pm = new products
            {
                name = u.name,
                cod_prod = u.cod_prod,
                reg_date = u.reg_date
            };

            var b = dc.inventory.Where(x => x.cod_prod == pm.cod_prod).FirstOrDefault();

            u.cod_prod = b.cod_prod;

            return View(u);
        }

        return Content("Invalid Request");

    }
}

[HttpPost]
public ActionResult prodEdit(products prod)
{
    using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
    {

        var u = dc.products.Where(a => a.id == prod.id).FirstOrDefault();

        var b = dc.inventory.Where(x => x.cod_prod == prod.cod_prod).FirstOrDefault();

        inventory bod = new inventory()
        {
            cod_prod = prod.cod_prod,
            reg_date = prod.reg_date
        };

        
        dc.inventory.Remove(b);
        dc.inventory.Add(bod);
        dc.products.Remove(u);
        dc.products.Add(prod);
        dc.SaveChanges();

        return RedirectToAction("prodList", "products");

    }
}

    [HttpPost]
    public ActionResult prodEdit(products prod)
    {
        using(inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            var u = dc.products.Where(a => a.id == prod.id).FirstOrDefault();

            if(u != null)
            {
                var pm = new products
                {
                    prod_name = prod.prod_name,
                    cod_prod = prod.cod_prod,
                    fecha_ingreso = prod.fecha_ingreso
                };

                var b = dc.bodega.Where(x => x.cod_prod == u.cod_prod).FirstOrDefault();
                
                if (b != null)
                {

                    inventory inv = new inventory()
                    {
                        reg_date = pm.fecha_ingreso,
                        cod_prod = pm.codigo_prod
                    };



                    if (inv.cod_prod != null)
                    {
                        dc.inventory.Remove(b);
                        dc.products.Remove(u);

                        dc.SaveChanges();

                        prodEdit2(prod, bod);
                    }
                }
            }
            return RedirectToAction("prodList", "products");
        }
    }

    [HttpPost]
    public ActionResult prodEdit2(products p, inventory i)
    {
        using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            dc.products.Add(p);
            dc.inventory.Add(i);

            dc.SaveChanges();

            return RedirectToAction("prodList", "products");
        }
    }

如有任何建议，我们将不胜感激

更新：

产品的型号

：

public partial class products
{

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

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

存货的型号

：

public partial class inventory
{
   [Key]
   [Display(Name = "Product Code")]
   public string cod_prod { get; set; }

   [Display(Name = "Register Date")]
   [DataType(DataType.Date)]
   [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy}")]
   public DateTime? reg_date { get; set; }
}

---

如果同样的事情发生在某人身上，这就是我写的解决方法，

controller

有两个

post

方法，第一个方法删除已更改的字段，保存数据库并将

产品

和

库存

对象发送到第二个方法，在那里添加模型的新数据并保存。我不得不这样做，因为删除

products

表上的PK会导致

null

这件事

控制器：

[HttpGet]
public ActionResult prodEdit(int id)
{
    using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
    {
        var u = dc.products.Where(a => a.id == id).FirstOrDefault();
        if (u != null)
        {
            var pm = new products
            {
                name = u.name,
                cod_prod = u.cod_prod,
                reg_date = u.reg_date
            };

            var b = dc.inventory.Where(x => x.cod_prod == pm.cod_prod).FirstOrDefault();

            u.cod_prod = b.cod_prod;

            return View(u);
        }

        return Content("Invalid Request");

    }
}

[HttpPost]
public ActionResult prodEdit(products prod)
{
    using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
    {

        var u = dc.products.Where(a => a.id == prod.id).FirstOrDefault();

        var b = dc.inventory.Where(x => x.cod_prod == prod.cod_prod).FirstOrDefault();

        inventory bod = new inventory()
        {
            cod_prod = prod.cod_prod,
            reg_date = prod.reg_date
        };

        
        dc.inventory.Remove(b);
        dc.inventory.Add(bod);
        dc.products.Remove(u);
        dc.products.Add(prod);
        dc.SaveChanges();

        return RedirectToAction("prodList", "products");

    }
}

    [HttpPost]
    public ActionResult prodEdit(products prod)
    {
        using(inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            var u = dc.products.Where(a => a.id == prod.id).FirstOrDefault();

            if(u != null)
            {
                var pm = new products
                {
                    prod_name = prod.prod_name,
                    cod_prod = prod.cod_prod,
                    fecha_ingreso = prod.fecha_ingreso
                };

                var b = dc.bodega.Where(x => x.cod_prod == u.cod_prod).FirstOrDefault();
                
                if (b != null)
                {

                    inventory inv = new inventory()
                    {
                        reg_date = pm.fecha_ingreso,
                        cod_prod = pm.codigo_prod
                    };



                    if (inv.cod_prod != null)
                    {
                        dc.inventory.Remove(b);
                        dc.products.Remove(u);

                        dc.SaveChanges();

                        prodEdit2(prod, bod);
                    }
                }
            }
            return RedirectToAction("prodList", "products");
        }
    }

    [HttpPost]
    public ActionResult prodEdit2(products p, inventory i)
    {
        using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
        {
            dc.products.Add(p);
            dc.inventory.Add(i);

            dc.SaveChanges();

            return RedirectToAction("prodList", "products");
        }
    }

---

假设产品和库存表之间有一对一的关系，您的模型在EF中如下所示：

产品模型

public class Products
{

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

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

   public virtual Inventory Inventory {get;set;}
}

库存模型

public class Inventory
{
   [Key, ForeignKey("Products")]
   [Display(Name = "Product Code")]
   public string cod_prod { get; set; }

   [Display(Name = "Register Date")]
   [DataType(DataType.Date)]
   [DisplayFormat(ApplyFormatInEditMode = true, DataFormatString = "{0:dd/MM/yyyy}")]
   public DateTime? reg_date { get; set; }

   public virtual Products Products {get;set;}
}

配置关系后，您只需在POST方法中执行此操作即可更新产品和库存：

[HttpPost]
public ActionResult prodEdit(Products prod)
{
    using (inventarioEntitiesDBA dc = new inventarioEntitiesDBA())
    {

        var product = dc.products.Where(a => a.id == prod.id).FirstOrDefault();

        var inventory = product.Inventory;

        inventory.cod_prod = prod.cod_prod;
        inventory.reg_date = prod.reg_date;
        dc.SaveChanges();

        return RedirectToAction("prodList", "products");

    }
}

---

您可以阅读有关如何配置EF关系的更多信息。

请显示您的模型。我用两个表的模型更新了问题。再次感谢您的建议。在

POST

操作上设置一个断点，查看

cod\u prod

是否为空。感谢您的回复，我真的不知道我可以用这种方式进行更新。我发布的解决方案是我能找到的唯一解决问题的方法，但是有了这个解决方案，你可以看出这要容易得多。