Question

我正在尝试打印出使用多个表中数据的用户配置文件（我正在使用实体框架）。

我没有收到代码上的任何错误，但是当我加载页面时，它给了我这个错误

实体或复杂类型'Ability_Examen_ASP.Models.Teacher'不能在LINQ to Entities查询中构建。

我想出一个解决方案，但我似乎无法弄明白。我是C＃的新手，我真的不知道如何解决这个问题。

期待任何帮助，提前谢谢！

这是我正在使用的所有代码

模型

public class ProfileViewModel
{
    public IEnumerable<Teacher> Teachers { get; set; }
    public IEnumerable<Skill> Skills { get; set; }
}

控制器

public ActionResult MyProfile()
{
    var id = Convert.ToInt32(Session["Teacher_ID"]);
    if (id != null)
    {

        var teacher = (from t in db.Teachers
                       where t.ID == id
                       select new Teacher
                       {
                           FirstName = t.FirstName,
                           LastName = t.LastName,
                           Campus = t.Campus,
                           Email = t.Email,
                           Password = t.Password
                       });

        if (teacher == null)
        {
            return HttpNotFound();
        }

        var teacherskills = (from ts in db.TeacherSkills
                             join s in db.Skills on ts.Skill_ID equals s.ID
                             where ts.Teacher_ID == id
                             select s);

        var model = new ProfileViewModel
        {
            Skills = teacherskills.ToList(),
            Teachers = teacher.ToList(),
        };
        return View(model);
    }
    return RedirectToAction("Login", "Auth");
}

数据库

查看

@model Ability_Examen_ASP.Models.ProfileViewModel

@{
    ViewBag.Title = "My Profile";
}

<h2>Details</h2>

<div>
    <h4>Teacher</h4>
    <hr />
    <dl class="dl-horizontal">
        <dt>
            Naam
        </dt>

        <dd>
            @foreach (var teacher in Model.Teachers)
            {
                @teacher.FirstName @teacher.LastName
            }
        </dd>

        <dt>
            Email
        </dt>

        <dd>
            @foreach (var teacher in Model.Teachers)
            {
                @teacher.Email
            }
        </dd>

        <dt>
            Passwoord
        </dt>

        <dd>
            @foreach (var teacher in Model.Teachers)
            {
                @teacher.Password
            }
        </dd>

        <dt>
            Campus
        </dt>

        <dd>
            @foreach (var teacher in Model.Teachers)
            {
                @teacher.Campus
            }
        </dd>

        <dt>
            Skills
        </dt>

        <dd>
            @foreach (var skill in Model.Skills)
            {
                @skill.SkillName
            }
        </dd>

    </dl>
</div>
<p>
    @Html.ActionLink("Edit Profile", "EditProfile") |
    @Html.ActionLink("Edit Skills", "AddSkills")
</p>

LINQ to Entities查询中的“无法构造类型”

0 个答案: