我正在嘗試顯示最近查看的產品,至此我已經完成了該操作。我有一個Product
表,有很多產品存儲。我有HomeController
,其中有一個顯示產品詳細信息的Details()
的Action方法。創建並從Cookie中讀取<>
我已經寫了AddRecentProduct
方法存儲在Session
最近瀏覽過的產品(10)現在我要存儲這些最近瀏覽的產品列表進入的cookie ATLEAST30天訪客的計算機上,因爲會話過期。就像Imdb最近查看。
另外如果我在我的數據庫RecentlyViewed
與列rv_id, userId, productId
創建另一個表我將如何保存recentViewedList數據在此? userId列將保存loggedIn用戶的ID,但如果用戶是Guest(未註冊),那麼解決方案是什麼?我需要使用GUID嗎?
RecentProduct.cs
public class RecentProduct
{
public int ProductId { get; set; }
public string ProdutName { get; set; }
public string ImageUrl { get; set; }
public DateTime LastVisited { get; set; }
}
控制器
public void AddRecentProduct(List<RecentProduct> list, int id, string name, int maxItems)
{
var item = recentProductList.FirstOrDefault(t => t.ProductId == id);
if (item == null)
{
list.Add(new RecentProduct
{
ProductId = id,
ProdutName = name,
LastVisited = DateTime.Now,
});
}
while (list.Count > maxItems)
{
list.RemoveAt(0);
}
}
public ActionResult Details(int? id)
{
if (id == null)
return new HttpStatusCodeResult(HttpStatusCode.BadRequest);
Product product = db.Products.Find(id);
if (product == null)
return HttpNotFound();
var list = Session["RecentProductList"] as List<RecentProduct>;
if (list == null)
{
list = new List<RecentProduct>();
Session["RecentProductList"] = list;
}
AddRecentProduct(list, id.Value, product.Name, 10);
ViewData["RecentProductList"] = list;
return View(product);
}
產品詳細查看頁面
<div class="col-sm-9">
@{
var recentProductList = ViewData["RecentProductList"] as List<Project.Models.RecentProduct>;
}
@foreach (var recentProduct in recentProductList)
{
<p>@recentProduct.ProdutName (id: @recentProduct.ProductId) </p>
}
</div>
我通過會話獲得期望的結果,現在我想用cookies來做同樣的事情。
這就是我想要創建的cookie:
List<RecentProduct> yourList = new List<RecentProduct>();
RecentProduct rc = new RecentProduct();
rc.ProdutName = product.Name;
rc.ProductId = product.ProductId;
rc.ImageUrl = product.ImagePath;
rc.LastVisited = DateTime.Now;
yourList.Add(rc);
var yourListString = String.Join(",", yourList);
// Create a cookie
HttpCookie yourListCookie = new HttpCookie("YourList", yourListString);
// The cookie will exist for 7 days
yourListCookie.Expires = DateTime.Now.AddDays(7);
// Write the Cookie to your Response
Response.Cookies.Add(yourListCookie);
,並在產品詳細查看頁面閱讀餅乾這樣的:
@if (Request.Cookies["YourList"] != null)
{
// Your cookie exists - grab your value and create your List
List<string> yourList = Request.Cookies["YourList"].Value.Split(',').Select(x => Convert.ToString(x)).ToList();
// Use your list here
<p>@yourList</p>
}
我沒有得到任何結果。我怎樣才能讀取cookie和值?
請再次閱讀該問題。現在我將它存儲在'Session'中,並且我想將它作爲產品列表存儲在Cookies中,並且我說** IF **我創建了一個用於存儲最近查看的產品的表格,這將是解決方案。 – user3223395667