Question

我正在创建一个Web应用程序，我似乎无法使用外键创建或编辑条目。我正在创建一个下拉列表来编辑记录，并且正在正确填充。但是无论何时我使用该外键编辑或创建新记录，我都会得到“值'2'无效。”

我的控制器

Start

我的观点

    [HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Edit([Bind(Include = "chimeTimeID,ScheduleID,ChimeTimeStamp")] ChimeTime chimeTime)
    {
        ViewData["scheduleID"] = new SelectList(db.Schedules, "scheduleID", "ScheduleName", "Select a Schedule");
        ViewBag.defaultModem = new SelectList(db.Schedules, "scheduleID", "ScheduleName", "Select a Schedule");

        if (ModelState.IsValid)
        {
            db.Entry(chimeTime).State = EntityState.Modified;
            db.SaveChanges();
            return RedirectToAction("Index");
        }
        return View(chimeTime);
    }

我的模特

    <div class="form-group">
        @Html.LabelFor(model => model.ScheduleID.ScheduleName, htmlAttributes: new { @class = "control-label col-md-2" })
        <div class="dropdown">
            @Html.DropDownListFor(model => model.ScheduleID, (SelectList)ViewBag.ScheduleName, htmlAttributes: new { @class = "form-control" })
            @Html.ValidationMessageFor(model => model.ScheduleID, "", new { @class = "text-danger" })
        </div>
    </div>

那么我做错了什么？在我看来，MVC没有将我的结果从表单解析为类似于它的int。

Answer 1

显然这应该是这样的：

我的控制器：

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create([Bind(Include = "chimeTimeID,schedule,ChimeTimeStamp")] ChimeTime chimeTime)
{
    ViewData["schedule"] = new SelectList(db.Schedules, "scheduleID", "ScheduleName", "Select a Schedule");
    ViewBag.schedule = new SelectList(db.Schedules, "scheduleID", "ScheduleName", "Select a Schedule");

    if (ModelState.IsValid)
    {
        chimeTime.ScheduleID = db.Schedules.Find (Int32.Parse (Request ["schedule"]));
        db.ChimeTimes.Add(chimeTime);
        db.SaveChanges();
        return RedirectToAction("Index");
    }

    buildChimeJob(chimeTime);

    return View(chimeTime);
}

我的观点：

<div class="form-group">
    @Html.LabelFor(model => model.schedule, htmlAttributes: new { @class = "control-label col-md-2" })
    <div class="dropdown">
        @Html.DropDownListFor(model => model.schedule, (SelectList)ViewBag.schedule, htmlAttributes: new { @class = "form-control" })
        @Html.ValidationMessageFor(model => model.schedule, "", new { @class = "text-danger" })
    </div>
</div>

我的模特：

[Table("P_ChimeTime")]
public class ChimeTime
{
    [Key]
    public int chimeTimeID { get; set; }
    public virtual Schedule ScheduleID { get; set; }
    [DataType(DataType.Time)]
    [DisplayFormat(DataFormatString = "{0:T}", ApplyFormatInEditMode = true)]
    public DateTime ChimeTimeStamp { get; set; }
    [ForiegnKey("ScheduleID")]
    public int schedule {get; set;}
}

使用下拉列表验证错误编辑/创建外键

1 个答案: