下拉列表发送实体唯一 ID 而不是所选项目

Question

我正在我的视图中填充一个下拉列表，其中包含从我的数据库填充的 view.bag 发送的项目。在视图中一切都很好，但是当它保存到数据库时，它会传递该实体的唯一 ID 而不是所选值..有人可以帮忙.. 谢谢...

*注意我的静态填充下拉菜单有效...它是导致问题的数据库中的下拉菜单。

这是我的代码：

 Controller:

 public ActionResult Create()
    {
        ViewBag.TeacherID = new SelectList(db.Teachers, "TeacherID", "LastName");
        ViewBag.SemesterID = new SelectList(db.Semesters, "SemesterID",            
        SemesterName");
        ViewBag.CourseID = new SelectList(db.Courses, "Section", "CourseSection");
        ViewBag.RoomID = new SelectList(db.Rooms, "RoomID", "FacilityIdentifier");


        var meetlist = new SelectList(new[]
               {
                 new { ID="M", Name="M"},
                 new { ID="T", Name="T"},
                 new { ID="W", Name="W"},
                 new { ID="TH", Name="TH"},
                 new { ID="T", Name="T"},
                 new { ID="F", Name="F"},
                 new { ID="MW", Name="MW"},  
                 new { ID="TTH", Name="TTH"}, 
               },
"ID", "Name", 1);

        ViewData["meetlist"] = meetlist

        return View();
    }

查看：

@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)

<fieldset>
    <legend>Assignment</legend>

    <div class="editor-label">
         COURSE
    </div>
    <div class="editor-field">
        @Html.DropDownList("CourseSection", String.Empty)
        @Html.ValidationMessageFor(model => model.Course.Section)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.TeacherID)
    </div>
    <div class="editor-field">
        @Html.DropDownList("TeacherID", String.Empty)
        @Html.ValidationMessageFor(model => model.TeacherID)
    </div>


    <div class="editor-label">
        @Html.LabelFor(model => model.RoomID)
    </div>
    <div class="editor-field">
        @Html.DropDownList("RoomID", String.Empty)
        @Html.ValidationMessageFor(model => model.RoomID)
    </div>


    <div class="editor-label">
        @Html.LabelFor(model => model.SemesterID)
    </div>
    <div class="editor-field">
        @Html.DropDownList("RoomID", String.Empty)
        @Html.ValidationMessageFor(model => model.RoomID)
    </div>


    <div class="editor-label">
        @Html.LabelFor(model => model.EnrollCap)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.EnrollCap)
        @Html.ValidationMessageFor(model => model.EnrollCap)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.EnrollTotal)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.EnrollTotal)
        @Html.ValidationMessageFor(model => model.EnrollTotal)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.StartTime)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.StartTime)
        @Html.ValidationMessageFor(model => model.StartTime)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.EndTime)
    </div>
    <div class="editor-field">
        @Html.EditorFor(model => model.EndTime)
        @Html.ValidationMessageFor(model => model.EndTime)
    </div>

    <div class="editor-label">
        @Html.LabelFor(model => model.Meeting)
    </div>
        <div>
        @Html.DropDownListFor(u => u.Meeting, ViewData["meetlist"] as SelectList,
                new { style = "width: 200px"})

               @Html.ValidationMessageFor(u=>u.Meeting)
       </div> 

    <p>
        <input type="submit" value="Create" />
    </p>

和型号：

public class Assignment
{
    public int AssignmentID { get; set; }
    public int CourseID { get; set; }
    public int TeacherID { get; set; }
    public int RoomID { get; set; }
    public int SemesterID { get; set; }


    public int EnrollCap { get; set; }
    public int EnrollTotal { get; set; }

    public DateTime StartTime { get; set; }
    public DateTime EndTime { get; set; }
    public string Meeting { get; set; }

    public virtual Course Course { get; set; }
    public virtual ICollection<Room> Room { get; set; }
    public virtual ICollection<Teacher> Teacher { get; set; }
    public virtual ICollection<Semester> Semester { get; set; }

}

提前谢谢你。

Answer 1

提供适当的SelectList（在您的情况下通过 ViewBags）作为下拉菜单的数据源，例如：

@Html.DropDownList("CourseSection", (SelectList)ViewBag.CourseID)
@Html.DropDownList("TeacherID", (SelectList)ViewBag.TeacherID )

等等……