使用MVC / EF总结购物车中的重复订单项
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了使用MVC / EF总结购物车中的重复订单项相关的知识，希望对你有一定的参考价值。
我目前正在创建一个简单的购物车，根据对表的调用显示行项目。我主要是在这里利用基本的CRUD，所以我正在读表，过滤掉userID并检查是否已经分配了orderID（以避免重新显示购物车中的订购商品）。
一切都很好，所有工作，但出于美观的原因，我想处理相同产品（相同的ProductID，相同的ProductName，但即不同的数量）被汇总在一个位置（订单数量A +订单数量B等）的情况比拥有不同数量的多个订单项。
旁注：我提供订阅以及单个订单（由表中的布尔值区分），所以请不要在此处激怒。
LineItems的模型如下所示：
public class LineItems
{
public int ID { get; set; }
public string UserID { get; set; }
public int ProductID { get; set; }
public string ProductName { get; set; }
//[Range(1, int.MaxValue, ErrorMessage = "Naja... Menge 0 lohnt sich nicht zu liefern...")]
public int SubscriptionQuantity { get; set; }
public string SubscriptionCadenceCategory { get; set; }
public int SubscriptionCadenceValue { get; set; }
public decimal SubscriptionPrice { get; set; }
public bool IsSingleOrder { get; set; }
//[Range(1, int.MaxValue, ErrorMessage = "Naja... Menge 0 lohnt sich nicht zu liefern...")]
public int SingleOrderQuantity { get; set; }
public decimal SingleOrderPrice { get; set; }
public decimal TotalPrice { get; set; }
public int OrderNumber { get; set; }
public DateTime UpdatedTimeStampUTC { get; set; }
public string UpdatedLatitude { get; set; }
public string UpdatedLongitude { get; set; }
public string UpdatedLocation { get; set; }
}
和观点：
<div id="shoppingCart" class="productTableSection row">
@foreach (var item in Model)
{
if (item.IsSingleOrder == false)
{
<div id="shoppingCartSubscriptionLineItemArea" class=" tableArea col-xs-offset-1 col-xs-10 col-sm-offset-1 col-sm-10 col-md-offset-1 col-md-10 col-lg-offset-2 col-lg-8">
@html.HiddenFor(modelItem => item.ID, new { @class = "tableField col-xs-12 col-sm-12 col-md-12 col-lg-12" })
<a id="shoppingCartSubscriptionRemoveLink" class="tableField col-xs-1 col-sm-1 col-md-1 col-lg-1" href="#">
<i id="shoppingCartSubscriptionRemove" class="fas fa-trash-alt"></i>
</a>
<a id="shoppingCartSubscriptionLineItemLink" class="tableField col-xs-10 col-sm-10 col-md-10 col-lg-10" href="@Url.Action("ProductSubscription", "freshNclean", new { id = item.ID })">
<div id="shoppingCartSubscriptionProductNameField" class="tableField col-xs-7 col-sm-8 col-md-9 col-lg-9">
@Html.DisplayFor(modelItem => item.ProductName)
</div>
<div id="shoppingCartSubscriptionProductPriceField" class="tableField col-xs-5 col-sm-4 col-md-3 col-lg-3">
CHF @Html.DisplayFor(modelItem => item.SubscriptionPrice)
</div>
<div id="shoppingCartSubscriptionProductQuantityField" class="tableField col-xs-4 col-sm-4 col-md-5 col-lg-5">
@Html.DisplayFor(modelItem => item.SubscriptionQuantity) x
</div>
<div id="shoppingCartSubscriptionCadenceValueField" class="tableField col-xs-3 col-sm-2 col-md-2 col-lg-1">
alle @Html.DisplayFor(modelItem => item.SubscriptionCadenceValue)
</div>
<div id="shoppingCartSubscriptionCadenceCategoryField" class="tableField col-xs-5 col-sm-6 col-md-5 col-lg-6">
@Html.DisplayFor(modelItem => item.SubscriptionCadenceCategory)
</div>
<div id="shoppingCartSubscriptionTotalPriceField" class="tableField col-xs-12 col-sm-12 col-md-12 col-lg-12">
CHF @Html.DisplayFor(modelItem => item.TotalPrice)
</div>
</a>
<a id="shoppingCartSubscriptionEditLink" class="tableField col-xs-1 col-sm-1 col-md-1 col-lg-1" href="#">
<i id="shoppingCartSubscriptionEdit" class="fas fa-edit"></i>
</a>
</div>
}
else
{
<div id="shoppingCartSingleOrderLineItemArea" class=" tableArea col-xs-offset-1 col-xs-10 col-sm-offset-1 col-sm-10 col-md-offset-1 col-md-10 col-lg-offset-2 col-lg-8">
@Html.HiddenFor(modelItem => item.ID, new { @class = "tableField col-xs-12 col-sm-12 col-md-12 col-lg-12" })
<a id="shoppingCartSingleOrderRemoveLink" class="tableField col-xs-1 col-sm-1 col-md-1 col-lg-1" href="#">
<i id="shoppingCartSingleOrderRemove" class="fas fa-trash-alt"></i>
</a>
<a id="shoppingCartSingleOrderLineItemLink" class="tableField col-xs-10 col-sm-10 col-md-10 col-lg-10" href="@Url.Action("ProductSingleOrder", "freshNclean", new { id = item.ID })">
<div id="shoppingCartSingleOrderProductNameField" class="tableField col-xs-7 col-sm-8 col-md-9 col-lg-9">
@Html.DisplayFor(modelItem => item.ProductName)
</div>
<div id="shoppingCartSingleOrderProductPriceField" class="tableField col-xs-5 col-sm-4 col-md-3 col-lg-3">
CHF @Html.DisplayFor(modelItem => item.SingleOrderPrice)
</div>
<div id="shoppingCartSingleOrderProductQuantityField" class="tableField col-xs-12 col-sm-12 col-md-12 col-lg-12">
@Html.DisplayFor(modelItem => item.SingleOrderQuantity) x
</div>
<div id="shoppingCartSingleOrderTotalPriceField" class="tableField col-xs-12 col-sm-12 col-md-12 col-lg-12">
CHF @Html.DisplayFor(modelItem => item.TotalPrice)
</div>
</a>
<a id="shoppingCartSingleOrderEditLink" class="tableField col-xs-1 col-sm-1 col-md-1 col-lg-1" href="#">
<i id="shoppingCartSingleOrderEdit" class="fas fa-edit"></i>
</a>
</div>
}
}
</div>
最后控制者：
// GET: /freshNclean/ShoppingCart
[Authorize]
public ActionResult ShoppingCart(Orders model)
{
// define variables
var userID = User.Identity.GetUserId();
DateTime nowUTC = DateTime.Now.ToUniversalTime();
DateTime nowLocal = DateTime.Now.ToLocalTime();
// track user activity: get method is restricted to activity name and timestamp
var LOADED = new UserActivities
{
UserID = userID,
ActivityName = "ShoppingCart_Loaded",
ActivityTimeStampUTC = nowUTC,
ActivityLatitude = "n/a",
ActivityLongitude = "n/a",
ActivityLocation = "n/a"
};
DATADB.UserActivityList.Add(LOADED);
DATADB.SaveChanges();
return View(DATADB.LineItemList.Where(x => x.UserID == userID).Where(x => x.OrderNumber == 0).ToList());
}
答案
我终于弄明白了 - 不是真的。我所做的是改变了写入购物车的方法。但最终结果是有效的。
以上是关于使用MVC / EF总结购物车中的重复订单项的主要内容，如果未能解决你的问题，请参考以下文章
如何从 Woocommerce 中的订单项中获取产品 sku [重复]