Question

我正在从

学习MVC中的实体框架

https://www.youtube.com/watch?v=8f4P8U1a2TI

当我在foreach循环中的第3行html中放置Html.DisplayNameFor（）时，它会给出以下错误：

CS0121：以下方法或之间的呼叫不明确   特性：   ＆＃39; System.Web.Mvc.Html.DisplayNameExtensions.DisplayNameFor   和

＆＃39; System.Web.Mvc.Html.DisplayNameExtensions.DisplayNameFor，MvcApplication1.Models.Department＆GT;

我有双重检查的HTML标签。但是找不到问题

索引视图：

    @model IEnumerable<MvcApplication1.Models.Employee>
@{
    ViewBag.Title = "Index";
}
<div style="font-family">
    <h2>
        Index</h2>
    <p>
        @Html.ActionLink("Create New", "Create")
    </p>
</div>
<table border="1">
    <tr>
        <th> </th>
        <th> </th>
        <th>  </th>
    </tr>
    @foreach (var item in Model)
    {
        <tr>
            <td>  </td>
            <td>  </td>
            <td>  @Html.DisplayNameFor(modelItem => item.Name)   </td>
        </tr>
    }
</table>

我搜索其他帖子..找不到相关内容。请建议

员工控制器

namespace MvcApplication1.Controllers
{
    public class EmployeeController : Controller
    {
        private EmployeeContext1 db = new EmployeeContext1();

        //
        // GET: /Employee/

        public ActionResult Index()
        {
            var employees = db.Employees.Include("Department");
            return View(employees.ToList());
        }

        //
        // GET: /Employee/Details/5

        public ActionResult Details(int id = 0)
        {
            Employee employee = db.Employees.Single(e => e.Id == id);
            if (employee == null)
            {
                return HttpNotFound();
            }
            return View(employee);
        }

        //
        // GET: /Employee/Create

        public ActionResult Create()
        {
            ViewBag.DepartmentId = new SelectList(db.Departments, "Id", "Name");
            return View();
        }

        //
        // POST: /Employee/Create

        [HttpPost]
        public ActionResult Create(Employee employee)
        {
            if (ModelState.IsValid)
            {
                db.Employees.AddObject(employee);
                db.SaveChanges();
                return RedirectToAction("Index");
            }

            ViewBag.DepartmentId = new SelectList(db.Departments, "Id", "Name", employee.DepartmentId);
            return View(employee);
        }

        //
        // GET: /Employee/Edit/5

        public ActionResult Edit(int id = 0)
        {
            Employee employee = db.Employees.Single(e => e.Id == id);
            if (employee == null)
            {
                return HttpNotFound();
            }
            ViewBag.DepartmentId = new SelectList(db.Departments, "Id", "Name", employee.DepartmentId);
            return View(employee);
        }

        //
        // POST: /Employee/Edit/5

        [HttpPost]
        public ActionResult Edit(Employee employee)
        {
            if (ModelState.IsValid)
            {
                db.Employees.Attach(employee);
                db.ObjectStateManager.ChangeObjectState(employee, System.Data.EntityState.Modified);
                db.SaveChanges();
                return RedirectToAction("Index");
            }
            ViewBag.DepartmentId = new SelectList(db.Departments, "Id", "Name", employee.DepartmentId);
            return View(employee);
        }

        //
        // GET: /Employee/Delete/5

        public ActionResult Delete(int id = 0)
        {
            Employee employee = db.Employees.Single(e => e.Id == id);
            if (employee == null)
            {
                return HttpNotFound();
            }
            return View(employee);
        }

        //
        // POST: /Employee/Delete/5

        [HttpPost, ActionName("Delete")]
        public ActionResult DeleteConfirmed(int id)
        {
            Employee employee = db.Employees.Single(e => e.Id == id);
            db.Employees.DeleteObject(employee);
            db.SaveChanges();
            return RedirectToAction("Index");
        }

        protected override void Dispose(bool disposing)
        {
            db.Dispose();
            base.Dispose(disposing);
        }
    }
}

模型由实体框架

自动生成

Answer 1

看，我已经改变了答案，这肯定会对你有用。

public ActionResult Index()
    {
        var employees = db.Employees.Include("Department");
        return View(employees);
    }

为什么在这里使用BeginForm？删除它

@foreach (var item in Model)
{
        <tr> <td>
        @Html.DisplayFor(modelItem => item.Name)
        </td> <td>
        @Html.DisplayFor(modelItem => item.City)
        </td> <td>
           @Html.DisplayNameFor(modelItem => item.Department.Name)
           </td> <td>
        @Html.ActionLink("Edit", "Edit", new { id = item.Id }) | <input type="submit"  value="Delete" onclick="return confirm('Are you Sure wanna Delete with ID =@item.Id');"/> </td> </tr>
}

希望，它会帮助你。

CS0121：以下方法或属性之间的调用不明确：

1 个答案: