C# 在视图中编辑记录时,数据库表中的字段将为空
每次我试图编辑我在ASP.NET MVC项目中创建的记录时,当我单击“保存”时,字段都将为空 以下是我在控制器中编辑、获取和发布的部分代码:C# 在视图中编辑记录时,数据库表中的字段将为空,c#,asp.net,asp.net-mvc,razor,C#,Asp.net,Asp.net Mvc,Razor,每次我试图编辑我在ASP.NET MVC项目中创建的记录时,当我单击“保存”时,字段都将为空 以下是我在控制器中编辑、获取和发布的部分代码: // GET: Reviews/Edit/5 public ActionResult Edit(int? id) { if (id == null) { return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
// GET: Reviews/Edit/5
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Review review = db.Reviews.Find(id);
if (review == null)
{
return HttpNotFound();
}
ViewBag.ReviewID = new SelectList(db.Reviews, "ReviewID", "Rating", review.ReviewID);
return View(review);
}
// POST: Reviews/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit([Bind(Include = "ReviewID,Username,WellnessService,Rating,Feedback,Date")] Review review)
{
if (ModelState.IsValid)
{
db.Entry(review).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("ReviewEdit");
}
ViewBag.ReviewID = new SelectList(db.Reviews, "ReviewID", "Rating", review.ReviewID);
return View(review);
}
审查控制员:
// GET: Reviews/Edit/5
public ActionResult Edit(int? id)
{
if (id == null)
{
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
}
Review review = db.Reviews.Find(id);
if (review == null)
{
return HttpNotFound();
}
ViewBag.ReviewID = new SelectList(db.Reviews, "ReviewID", "Rating", review.ReviewID);
return View(review);
}
// POST: Reviews/Edit/5
// To protect from overposting attacks, please enable the specific properties you want to bind to, for
// more details see http://go.microsoft.com/fwlink/?LinkId=317598.
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Edit([Bind(Include = "ReviewID,Username,WellnessService,Rating,Feedback,Date")] Review review)
{
if (ModelState.IsValid)
{
db.Entry(review).State = EntityState.Modified;
db.SaveChanges();
return RedirectToAction("ReviewEdit");
}
ViewBag.ReviewID = new SelectList(db.Reviews, "ReviewID", "Rating", review.ReviewID);
return View(review);
}
以下是我的视图“编辑”的代码:
@using (Html.BeginForm())
{
@Html.AntiForgeryToken()
<div class="form-horizontal">
<h4>@Html.DisplayFor(model => model.WellnessService)</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
@Html.HiddenFor(model => model.ReviewID)
<div class="form-group">
@Html.LabelFor(model => model.Rating, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10" align="left">
@{
List<SelectListItem> listItems = new List<SelectListItem>();
listItems.Add(new SelectListItem { Text = "1", Value = "1" });
listItems.Add(new SelectListItem { Text = "2", Value = "2" });
listItems.Add(new SelectListItem { Text = "3", Value = "3" });
listItems.Add(new SelectListItem { Text = "4", Value = "4" });
listItems.Add(new SelectListItem { Text = "5", Value = "5" });
listItems.Add(new SelectListItem { Text = "6", Value = "6" });
listItems.Add(new SelectListItem { Text = "7", Value = "7" });
}
@Html.DropDownListFor(model => model.Rating, listItems, "Please choose value")
@Html.ValidationMessageFor(model => model.Rating, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
@Html.LabelFor(model => model.Feedback, htmlAttributes: new { @class = "control-label col-md-2" })
<div class="col-md-10">
@Html.TextAreaFor(model => model.Feedback, new { htmlAttributes = new { @class = "form-control" } })
@Html.ValidationMessageFor(model => model.Feedback, "", new { @class = "text-danger" })
</div>
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Save" class="btn btn-default" />
</div>
</div>
</div>
}
<div>
@Html.ActionLink("Back to My Reviews", "ReviewEdit", new { @class = "btn btn-success btn-lg" })
</div>
@section Scripts {
@Scripts.Render("~/bundles/jqueryval")
}
@使用(Html.BeginForm())
{
@Html.AntiForgeryToken()
@DisplayFor(model=>model.WellnessService)
@Html.ValidationSummary(true,“,new{@class=“text danger”})
@Html.HiddenFor(model=>model.ReviewID)
@LabelFor(model=>model.Rating,htmlAttributes:new{@class=“controllabel col-md-2”})
@{
List listItems=新列表();
添加(新建SelectListItem{Text=“1”,Value=“1”});
添加(新建SelectListItem{Text=“2”,Value=“2”});
添加(新建SelectListItem{Text=“3”,Value=“3”});
添加(新建SelectListItem{Text=“4”,Value=“4”});
添加(新建SelectListItem{Text=“5”,Value=“5”});
添加(新建SelectListItem{Text=“6”,Value=“6”});
添加(新建SelectListItem{Text=“7”,Value=“7”});
}
@Html.DropDownListFor(model=>model.Rating,列表项,“请选择值”)
@Html.ValidationMessageFor(model=>model.Rating,“,new{@class=“text danger”})
@LabelFor(model=>model.Feedback,htmlAttributes:new{@class=“controllabel col-md-2”})
@Html.TextAreaFor(model=>model.Feedback,new{htmlAttributes=new{@class=“form control”})
@Html.ValidationMessageFor(model=>model.Feedback,“,new{@class=“text danger”})
}
@ActionLink(“返回到我的评论”,“ReviewEdit”,new{@class=“btn btn success btn lg”})
@节脚本{
@Scripts.Render(“~/bundles/jqueryval”)
}
非常感谢您的帮助
提前感谢我们手头没有开发人员电脑来检查这一点,但您确定review中有数据吗。如果有,你能确定下面这一行是否有效吗
db.Entry(review).State = EntityState.Modified;
你不需要将评论附加到上下文中吗
如果你临时做了这样的事情,会发生什么
if (ModelState.IsValid)
{
var foo = db.Entry.Where(x=>x.reviewId == review.reviewId).First();
// then manually set all the parameters
db.SaveChanges();
return RedirectToAction("ReviewEdit");
}
这并不优雅,但如果这样做有效,并且数据已更新,至少您知道将对象附加到上下文的方式。
稍后,当我可以到达开发人员工作站时,我将尝试获得一个更好的示例。您能否在控制器方法post
Edit()
中放置一个断点,并查看review
的内容?它也是空的吗?