Question

我有三个模型：VehicleType，VehicleModel和VehicleManufacturer。

模型中VehicleType和VehicleManufacturer都指向VehicleModel，如下所示：

public class VehicleModel
{
    [Key]
    public int ModelId { get; set; }

    [Required(ErrorMessage = "Field is Required")]
    public int TypeId { get; set; }

    [Required(ErrorMessage = "Field is Required")]
    public int ManufacturerId { get; set; }
    public string ModelName { get; set; }


    public VehicleType VehicleType { get; set; }
    public VehicleManufacturer Manufacturer { get; set; }

}

从那里，VehicleModel指向InventoryModel：

 public class Inventory
{
    [Key]
    public int InventoryId { get; set; }
    public int Price { get; set; }
    public int Mileage { get; set; }
    public int Year { get; set; }


    public int ModelId { get; set; }
    public VehicleModel VehicleModel { get; set; }
}

我的问题是，当我尝试对所有三个下拉列表（VehicleType，VehicleManufacturer，VehicleModel）进行客户端验证时，它只适用于VehicleModel。

使用这些模型验证这两个下拉列表需要做些什么？

这是我的控制器（fyi）：

 // GET: /Inventory/Create
    public ActionResult Create()
    {
        ViewBag.TypeId = new SelectList(db.Types, "TypeId", "TypeName"); //(Object List, Value Field (usually Id), Column)
        ViewBag.ModelId = new SelectList(db.Models, "ModelId", "ModelName"); //(Object List, Value Field (usually Id), Column)
        ViewBag.ManufacturerId = new SelectList(db.Manufacturers, "ManufacturerId", "ManufacturerName"); //(Object List, Value Field (usually Id), Column)

        return View();
    }

    // POST: /Inventory/Create
    // To protect from overposting attacks, please enable the specific properties you want to bind to, for 
    // more details see http://go.microsoft.com/fwlink/?LinkId=317598.
    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create(Inventory inventory, VehicleManufacturer VehicleManufacturer, VehicleType VehicleType)
    {
        if (ModelState.IsValid)
        {
            db.Inventorys.Add(inventory);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        ViewBag.TypeId = new SelectList(db.Types, "TypeId", "TypeName");
        ViewBag.ModelId = new SelectList(db.Models, "ModelId", "ModelName");
        ViewBag.ManufacturerId = new SelectList(db.Manufacturers, "ManufacturerId",     "ManufacturerName");

        return View(inventory);
    }

查看：

 <div class="editor-label">
        @Html.LabelFor(model => model.VehicleModel.TypeId, "Some name for column")
    </div>
    <div class="editor-field">
        @Html.DropDownList("TypeId", String.Empty)

        @Html.ValidationMessageFor(model => model.VehicleModel.TypeId)
    </div>


    <div class="editor-label">
        @Html.LabelFor(model => model.ModelId, "Some name for column")
    </div>
    <div class="editor-field">
        @Html.DropDownList("ModelId", String.Empty)
        @Html.ValidationMessageFor(model => model.ModelId)
    </div>



    <div class="editor-label">
        @Html.LabelFor(model => model.VehicleModel.ManufacturerId, "Some name for column")
    </div>
    <div class="editor-field">
        @Html.DropDownList("ManufacturerId", String.Empty)
        @Html.ValidationMessageFor(model => model.VehicleModel.ManufacturerId)
    </div>

请有人帮忙。我已经这么多个小时了！

Answer 1

我上面看到的实际上有两个问题

1）您没有将DropDownList和ValidationMessageFor映射到相同的模型属性。

@Html.ValidationMessageFor(model => model.VehicleModel.ManufacturerId)

上述内容将其绑定到VehicleModel_ManufacturerId，其中：

@Html.DropDownList("ManufacturerId", String.Empty)

以上是将DropDown映射到ManufacturerId

您需要更改其中一个以相互匹配。

2）在上面的代码中，我没有看到任何验证属性。当你在这里复制代码时，你忘记了它们吗？

希望这会有所帮助，如果您需要更多详细信息，请与我们联系。

多个模型的MVC客户端验证

1 个答案: