DataBinding:'System.Web.Mvc.SelectListItem'不包含名为'CategoryTypeID'的属性

Question

我正在使用MVC.我想传递我从视图中输入的类别数据并传递给我的Post/Createcontroller,但这并不是让我传递我从下拉列表中选择的categoryTypeID.

这是错误:

DataBinding:'System.Web.Mvc.SelectListItem'不包含名为'CategoryTypeID'的属性.

这是我的代码:

My CreateController:
//
        // POST: /Category/Create

        [HttpPost]
        public ActionResult Create(Category category)
        {
            if (ModelState.IsValid)
            {
                db.Categories.Add(category);
                db.SaveChanges();
                return RedirectToAction("Index");
            }


            ViewBag.CategoryTypes = new SelectList(db.CategoryTypes, "CategoryTypeID", "Name", category.CategoryTypeID);

            return View(category);
        }
My Create View
@model Haykal.Models.Category




<div class="editor-label">
            @Html.LabelFor(model => model.CategoryTypeID, "CategoryType")
        </div>
        <div class="editor-field">
            @Html.DropDownListFor(model => model.CategoryTypeID,
            new SelectList(ViewBag.CategoryTypes as System.Collections.IEnumerable, "CategoryTypeID", "Name"),
          "--select Category Type --", new { id = "categoryType" })
            @Html.ValidationMessageFor(model => model.CategoryTypeID)
        </div>

Answer 1

我遇到了这个错误.我绑定了View Model的一个对象:

editPanelViewModel.Panel = new SelectList(panels, "PanelId", "PanelName");

在View中,我创建了ListBox,如下所示:

@Html.ListBoxFor(m => m.Panel, new SelectList(Model.Panel, "PanelId", "PanelName"))

事实应该是这样的:

@Html.ListBoxFor(m => m.Panel, new SelectList(Model.Panel, "Value", "Text"))

Answer 2

您SelectList在控制器和视图中定义了两次.

保持视图清洁.在您的情况下,以下就足够了: @Html.DropDownListFor(model => model.CategoryTypeID, (SelectList)ViewBag.CategoryTypes)

我不得不承认DropDownListFor在开始时很混乱:)