Question

我正在编写一个包含MVC和Entity Framework的网页。我有一个附加了订单项的订单，并希望将一个复杂的对象返回给控制器进行处理。

我现在已经包含了所有代码。

我的观点：

@model BCMManci.ViewModels.OrderCreateGroup

@{
    ViewBag.Title = "Create";
}
<h2>New Order</h2>

@using (Html.BeginForm())
{
    @Html.AntiForgeryToken()

    <h4>@Html.DisplayFor(model => model.Order.Customer.FullName)</h4>

    <table>
        <tr>
            <td><b>Order Date:</b> @Html.DisplayFor(model => model.Order.OrderDate)</td>
            <td><b>Status:</b> @Html.DisplayFor(model => model.Order.OrderStatus.OrderStatusName)</td>
        </tr>
        <tr>
            <td colspan="2">
                <b>Notes</b>
                @Html.EditorFor(model => model.Order.Notes, new { htmlAttributes = new { @class = "form-control" } })
            </td>
        </tr>
    </table>
        @Html.ValidationMessageFor(model => model.Order.Notes, "", new { @class = "text-danger" })
        <hr />
        @Html.ValidationSummary(true, "", new { @class = "text-danger" })


        <table class="table table-striped table-hover">
            <thead>
                <tr>
                    <td>Name</td>
                    <td>Price</td>
                    <td>Discount</td>
                    <td>Total</td>
                    <td>Quantity</td>
                </tr>
            </thead>
            <tbody>
                @foreach (var product in Model.ProductWithPrices)
                {
                    <tr>
                        <td>
                            @Html.DisplayFor(modelItem => product.ProductName)
                        </td>
                        <td>
                            @Html.DisplayFor(modelItem => product.SellingPrice)
                        </td>
                        <td>
                            @Html.DisplayFor(modelItem => product.DiscountPrice)
                        </td>
                        <td>
                            @Html.DisplayFor(modelItem => product.TotalPrice)
                        </td>
                        <td>
                            @Html.EditorFor(modelItem => product.Quantity, new { htmlAttributes = new { @class = "form-control" } })
                        </td>
                    </tr>
                }
            </tbody>
        </table>

        <input type="submit" value="Create" class="btn btn-default" />
}
<div class="btn btn-danger">
    @Html.ActionLink("Cancel", "Index")
</div>

@section Scripts {
    @Scripts.Render("~/bundles/jqueryval")

}

控制器：

[HttpPost]
    [ValidateAntiForgeryToken]
    public ActionResult Create([Bind(Include = "Order,ProductWithPrices,Order.Note,product.Quantity")] OrderCreateGroup order)
    {
        try
        {
            if (ModelState.IsValid)
            {
                db.Orders.Add(order.Order);

                foreach (var orderItem in order.ProductWithPrices.Select(item => new OrderItem
                {
                    OrderId = order.Order.OrderId,
                    ProductId = item.ProductId,
                    Quantity = item.Quantity,
                    ItemPrice = item.SellingPrice,
                    ItemDiscount = item.DiscountPrice,
                    ItemTotal = item.TotalPrice
                }))
                {
                    db.OrderItems.Add(orderItem);
                }
                db.SaveChanges();
                return RedirectToAction("ConfirmOrder", new {id = order.Order.OrderId});
            }
        }
        catch (DataException /* dex */)
        {
            //TODO: Log the error (uncomment dex variable name and add a line here to write a log.
            ModelState.AddModelError("", "Unable to save changes. Try again, and if the problem persists see your system administrator.");
        }
        ViewBag.Products = db.Products.Where(model => model.IsActive == true);

        PopulateDropdownLists();
        return View(order);
    }

数据来源：

public class OrderCreateGroup
{
    public OrderCreateGroup()
    {
        ProductWithPrices = new List<ProductWithPrice>();
    }

    public Order Order { get; set; }
    public ICollection<ProductWithPrice> ProductWithPrices { get; set; }
}

public class ProductWithPrice : Product
{
    public decimal SellingPrice { get; set; }
    public decimal DiscountPrice { get; set; }

    public int Quantity { get; set; }

    public decimal TotalPrice { get; set; }
}

但是，表单上输入的值不会通过。所以我无法在控制器中访问它们。 'productWithPrices'集合为空，尽管网页上有数据。

我已尝试将其设为asyc，并尝试更改ActionLink按钮，如下所示，但它没有到达控制器。

@Html.ActionLink("Create", "Create", "Orders", new { orderCreateGoup = Model }, null)

这是控制器，但它现在没有意义，因为在页面的数据源中传递参数。

public ActionResult Create(OrderCreateGroup orderCreateGoup)

拜托，你能指点我最好的方法吗？

Answer 1

在OrderCreateGroup类中，将集合初始化为空列表。

public class OrderCreateGroup
{
    public OrderCreateGroup()
    {
       ProductWithPrices = new List<ProductWithPrice>();
    }
    public Order Order { get; set; }
    public ICollection<ProductWithPrice> ProductWithPrices { get; set; }
}

如果要将其发布回控制器，则需要为使用DisplayFor的其他绑定字段添加@Html.HiddenFor(m => m.SellingPrice)。

注意：为了您的利益，请尝试在浏览器中呈现页面时查看生成的HTML代码，并查看<form>标记内生成的标记name属性。

Answer 2

确保从复杂对象绑定适当的属性，如下所示：

@model  BCMManci.ViewModels.OrderCreateGroup

...
@using (Html.BeginForm()) 
{
    @Html.AntiForgeryToken()

    <div class="form-horizontal">


        ...
        <div class="form-group">
            @Html.LabelFor(model => model.LastName, htmlAttributes: new { @class = "control-label col-md-2" })
            <div class="col-md-10">
                @Html.EditorFor(model => model.OrderCreateGroup.Order.Quantity, new { htmlAttributes = new { @class = "form-control" } })
                @Html.ValidationMessageFor(model => model.OrderCreateGroup.Order.Quantity, "", new { @class = "text-danger" })
            </div>
        </div>



        <div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" value="Create" class="btn btn-default" />
            </div>
        </div>
    </div>
}

<div>
    @Html.ActionLink("Back to List", "Index")
</div>

注意：model.OrderCreateGroup.Order.Quantity将是您订单的属性之一。希望这有帮助。

MVC将复杂对象传递给控制器以进行保存

2 个答案:

MVC将复杂对象传递给控制器​​以进行保存

2 个答案:

MVC将复杂对象传递给控制器以进行保存