[英]ASP.NET MVC DropDownList displaying “Id” instead of “Description”
我一直在用ASP.NET MVC做一些教程,並決定嘗試一些我還沒有看到的東西。
我有兩個表:“患者”和“分類”。 我希望能夠創建一個新的分類,然后當我創建或編輯新患者時,我可以選擇一個分類。
現在,以我的DropDownList中的內容為例,假設我有貓,狗和魚。 如果我選擇cat,則顯示的值為1,而不是實際的單詞“ cat”。
我的問題是,這可以通過我擁有的代碼來實現嗎?或者是否需要完全重寫? 如果您還有其他一般性建議,請告訴我。
我的控制器:
private PatientContext db = new PatientContext();
private ClassificationContext dbCC = new ClassificationContext();
public ActionResult Index(string sortOrder)
{
return View();
}
public ActionResult Create([Bind(Include = "PatientId,First_Name,Last_Name,Address,City,State,Zipcode,Phone,ClassificationId")] Patient patient)
{
if (ModelState.IsValid)
{
db.Patients.Add(patient);
db.SaveChanges();
return RedirectToAction("Index");
}
ViewBag.Classifications = new SelectList(dbCC.Classifications, "ClassificationId", "Description");
return View(patient);
}
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Patient patient = db.Patients.Find(id);
if (patient == null)
{
return HttpNotFound();
}
ViewBag.Classifications = new SelectList(dbCC.Classifications, "ClassificationId", "Description");
return View(patient);
}
患者模型:
public class Patient
{
public int PatientId { get; set; }
[DisplayName("Classification")]
public int ClassificationId { get; set; }
}
分類模型:
public class Classification
{
public int ClassificationId { get; set; }
public string Description { get; set; }
}
創建(患者)視圖:
<div class="form-group">
@Html.LabelFor(model => model.ClassificationId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@*@Html.EditorFor(model => model.ClassificationId)*@
@Html.DropDownListFor(model => model.ClassificationId, (IEnumerable<SelectListItem>)ViewBag.Classifications, "Select Classification")
@Html.ValidationMessageFor(model => model.ClassificationId)
</div>
</div>
編輯(患者)視圖:
<div class="form-group">
@Html.LabelFor(model => model.ClassificationId, new { @class = "control-label col-md-2" })
<div class="col-md-10">
@*@Html.EditorFor(model => model.ClassificationId)*@
@Html.DropDownListFor(model => model.ClassificationId,(IEnumerable<SelectListItem>)ViewBag.Classifications, "Select Classification")
@Html.ValidationMessageFor(model => model.ClassificationId)
</div>
</div>
索引(患者)視圖:
<td>
@Html.DisplayFor(modelItem => item.ClassificationId)
</td>
您需要區分SelectListItem.Text
(顯示在下拉列表中)和SelectListItem.Value
(綁定到模型的值)
用類似下面的ViewBag.Classifications
替換定義ViewBag.Classifications
的控制器中的行:
ViewBag.Classifications = dbCC.Classifications
.Select(c => new SelectListItem { Value = c.ClassificationId, Text = c.Description })
.ToList();
應該這樣做。
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