Hello,
I am new to MVC, and so am working through the NerdDinner tutorial, here.
In particular, I'm running into problems
with the use of the UpdateModel method, which is explained
in the part five of that tutorial. The problem is, when I try to
edit the value of a dinner object using the UpdateModel method, the values do not get updated, and no exceptions are thrown.
Oddly, I am not having any trouble
with the Create or Delete features that are illustrated
in the tutorial. Only the update feature isn't working.
Below, I have included the Controller code that I am using, as well as the view markup, which is contained
in both an aspx View file and an ascx Partial View file.
Here is the code inside my Controller, called DinnerController.cs:
//
// GET: /Dinners/Edit/2
[Authorize]
public ActionResult Edit(int id)
{
Dinner dinner = dinnerRepository.GetDinner(id);
return View(new DinnerFormViewModel(dinner));
}
//
// POST: /Dinners/Edit/2
[AcceptVerbs(HttpVerbs.Post), Authorize]
public ActionResult Edit(int id, FormCollection formValues)
{
Dinner dinner = dinnerRepository.GetDinner(id);
try
{
UpdateModel(dinner);
var x = ViewData.GetModelStateErrors(); // <-- to catch other ModelState errors
dinnerRepository.Save();
return RedirectToAction("Details", new { id = dinner.DinnerID });
}
catch
{
ModelState.AddRuleViolations(dinner.GetRuleViolations());
return View(new DinnerFormViewModel(dinner));
}
}
The
line
with the comment "to catch other ModelState errors" was added after reading a possible solution from another StackOverflow thread, here:
http://stackoverflow.com/questions/1461283/asp-net-mvc-updatemodel-not-updating-but-not-throwing-error
Unfortunately, that solution didn't help me.
Here is the corresponding markup
in my Dinners/Edit.aspx View:
<asp:Content ID="Main" ContentPlaceHolderID="MainContent" runat="server">
<h2>Edit Dinner</h2>
<% Html.RenderPartial("DinnerForm"); %>
</asp:Content>
Here is the corresponding markup
in my DinnerForm.ascx Partial View. This Partial View file is also used by the Create feature, which is working fine:
<%=Html.ValidationSummary("Please correct the errors and try again.") %>
<% using (Html.BeginForm()) { %>
<fieldset>
<p>
<label for="Title">Dinner Title:</label>
<%=Html.TextBoxFor(model => Model.Dinner.Title)%>
<%=Html.ValidationMessage("Title", "*") %>
</p>
<p>
<label for="EventDate">EventDate:</label>
<%=Html.TextBoxFor(model => Model.Dinner.EventDate, new { value = String.Format("{0:g}", Model.Dinner.EventDate) })%>
<%=Html.ValidationMessage("EventDate", "*") %>
</p>
<p>
<label for="Description">Description:</label>
<%=Html.TextBoxFor(model => Model.Dinner.Description)%>
<%=Html.ValidationMessage("Description", "*")%>
</p>
<p>
<label for="Address">Address:</label>
<%=Html.TextBoxFor(model => Model.Dinner.Address)%>
<%=Html.ValidationMessage("Address", "*") %>
</p>
<p>
<label for="Country">Country:</label>
<%=Html.DropDownListFor(model => Model.Dinner.Country, Model.Countries)%>
<%=Html.ValidationMessage("Country", "*") %>
</p>
<p>
<label for="ContactPhone">ContactPhone #:</label>
<%=Html.TextBoxFor(model => Model.Dinner.ContactPhone)%>
<%=Html.ValidationMessage("ContactPhone", "*") %>
</p>
<p>
<label for="Latitude">Latitude:</label>
<%=Html.TextBoxFor(model => Model.Dinner.Latitude)%>
<%=Html.ValidationMessage("Latitude", "*") %>
</p>
<p>
<label for="Longitude">Longitude:</label>
<%=Html.TextBoxFor(model => Model.Dinner.Longitude)%>
<%=Html.ValidationMessage("Longitude", "*") %>
</p>
<p>
<input type="submit" value="Save"/>
</p>
</fieldset>
<% } %>
In any case, I've been hitting away at this for hours, and I'm out of ideas. So, I'm hoping someone here can help nudge me
in the right direction,
in order to figure out what I'm doing wrong.
