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使用 MVC 框架，我创建了一个视图来将 Mentee 添加到我的 Mentee 数据库表中。虽然我能够输入与我的学员相关的所有信息，但我似乎无法弄清楚如何从我的学校下拉框中选择任何值并将 id 值输入到交叉引用表mentee_school注意：有已经在学校下拉表中的值。例如：

在此处输入图像描述

表关系：

在此处输入图像描述

受指导者视图模型：

 public class MenteeViewModel
{

    public mentee mentee { get; set; }
    public guardian guardian { get; set; }
    public address address { get; set; }        
    public email email { get; set; }
    public user users { get; set; }
    public phnumber phnumber { get; set; }                
    public econtact econtact { get; set; }        
    [Display(Name = "School System")]
    public int SelectedSSystemId { get; set; }
    public IEnumerable<SelectListItem> SSystemItems { get; set; }
    [Display(Name = "School")]
    public int SelectedSchoolId { get; set; }
    public IEnumerable<SelectListItem> SchoolItems { get; set; }      

}

受指导者观点：

 <div class="editor-label">
        @Html.LabelFor(model => model.SelectedSchoolId)
    </div>        
    <div class="editor-field">
       @Html.DropDownListFor(model => model.SelectedSchoolId,(IEnumerable<SelectListItem>)ViewBag.school_ids, "--Select One--")
    </div>

指导者控制器

 [HttpPost]
    public ActionResult Create(ViewModels.MenteeViewModel menteeViewModel )
    {
        if (ModelState.IsValid)
        {

            menteeViewModel.mentee.addresses.Add(menteeViewModel.address);
            menteeViewModel.mentee.guardians.Add(menteeViewModel.guardian);
            menteeViewModel.mentee.econtacts.Add(menteeViewModel.econtact);
            menteeViewModel.mentee.emails.Add(menteeViewModel.email);

            //Below statement doesn't work with current model
            menteeViewModel.mentee.schools.Add(menteeViewModel.SelectedSchoolId);

            db.mentees.Add(menteeViewModel.mentee);               
            db.SaveChanges();




            return RedirectToAction("Index");

        }

        return Create();
    }

我的问题是如何将下拉框中所选学校的值和学员 id 保存到 mentee_school 交叉引用表中？

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1 回答 1

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我决定走另一条路。我在“Mentees”表中添加了一个 schoolId 列，这样每当我添加一个学员时，我都会使用 SelectedSchoolID 更新该值。

menteeViewModel.mentee.schoolId = menteeViewModel.SelectedSchoolId.ToString();
db.mentees.Add(menteeViewModel.mentee);
db.SaveChanges();

不管怎么说，还是要谢谢你！

于 2013-09-11T14:59:59.587 回答