ASP.NET MVC Redirect

Question

I work on one of my first ASP MVC-programs at the moment. The program should show me a list of product, and with a link beneath the name of the product it should be possible to edit the product. No problem so far.

@model MVC3Demo.Product

@{
    ViewBag.Title = "Edit";
}

<h2>Edit</h2>
@using (Html.BeginForm("Save", "Product"))
{
<div>
    <input type="hidden" id="ID" name="ID" value="@Model.ID" />
    ProduktID @Model.ID
</div>
<div>
    Produktname <input id="Name" name="Name" type="text" value=@Model.Name />
</div>
<div>
    Preis <input id="Price" name="Price" type="text" value=@Model.Price />
</div>
<div>
    <input type="submit" value="Speichern"/>
</div>

}

Now I have written a Save action method that should update my data:

    public ActionResult Save(Product p)
    {
        ProductRepository rep = new ProductRepository();
        rep.Update(p);
        return RedirectToAction("List");
    }

The "List"-View is where I can see all products with the edit-link. The problem is, that if I press the save-button, it redirects me to the old list, not to the updated one. I debugged my project and I´m sure that the update-method works correct and updates the product.

My List action is:

@model IEnumerable<MVC3Demo.Product>

@{
    ViewBag.Title = "List";
}

<h2>List</h2>

<ul>
@foreach (MVC3Demo.Product p in Model)
{
    <li>@p.Name @Html.ActionLink("bearbeiten", "Edit", "Product", p, null)</li>  //new{ ID = p.id}
}
</ul>

Because you asked, here is the List Action:

    public ActionResult List()
    {
        ProductRepository rep = new ProductRepository();
        return View(rep.GetAll());
    }

So where could be my mistake?

Answer 1

It looks like you're calling the update, but you're not actually submitting the transaction itself, does your repository have a SubmitChanges, AcceptChanges or Commit or something similar? As with DataTables, your changes won't actually take effect (save to the database) until you call AcceptChanges.

Answer 2

Try include an HttpPost attribute at Save controller method.

[HttpPost]
public ActionResult Save(Product p)
    {
        ProductRepository rep = new ProductRepository();
        rep.Update(p);
        return RedirectToAction("List");
    }