Question

我有一个产品表，其中包含Product_Id(pk), Name, Price, description, CategoryId, SubCategoryId, SubSubCategoryId列

以及另一个类别表，其中包含CategoryId(pk), CategoryName, ParentId列。

另一个表 ProductAttributesValues ，列ProductAttributeValueId(pk), ProductId(fk), Size, Quantity

我在类别表格中输入了这些数据：

CategoryId | CategoryName | ParentId
    1      |   Clothing   |   NULL
    2      |   Computing  |   NULL
    3      |     Books    |   NULL
    4      |    Men's     |   1
    5      |    Women's   |   1
    6      |     Kid's    |   1
    7      |    Laptops   |   2
    8      |   Desktops   |   2
    9      |    Shirts    |   4
    10     |     Tops     |   5
    11     |   Macbooks   |   7
    11     |  Ultrabooks  |   7

正如您所见，具有NULL值的类别是父级，其他是他们的孩子，依此类推。喜欢：类别服装＆gt; 子类别男士＆gt; SubSubCategory 衬衫

Product.cs

public partial class Product
{
    public int ProductId { get; set; }
    public int CategoryId { get; set; }
    public int SubCategoryId { get; set; }
    public int SubSubCategoryId { get; set; }
    [Required]
    [StringLength(50)]
    public string Name { get; set; }
    [AllowHtml]
    public string Description { get; set; }
    public decimal? Price { get; set; }
}

ProductAttributeValues.cs

public partial class ProductAttributeValues
{
    public int ProductAttributeValueId { get; set; }
    public int ProductId { get; set; }
    public string Size {get; set; }
    public int Quantity { get; set; }
}

视图模型

public class ProductAttributesViewModel
{
    public int ProductId { get; set; }
    public int? CategoryId { get; set; }
    public int? SubCategoryId { get; set; }
    public int? SubSubCategoryId { get; set; }
    [Required]
    [StringLength(50)]
    public string Name { get; set; }
    [AllowHtml]
    public string Description { get; set; }
    public decimal? Price { get; set; }
    public int? Quantity { get; set; }
    public string Sizes { get; set; }
    public int Stock { get; set; }
    public Product Product { get; set; }
    public Category Category { get; set; }
}

控制器

[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult AddProduct(ProductAttributesViewModel newRecord)
    {
      IEnumerable<SelectListItem> categories = db.Categories.Where(w => w.ParentId == null).Select(c => new SelectListItem
        {
            Value = c.CategoryId.ToString(),
            Text = c.Name
        });
        ViewBag.CategoryId = categories;

                   var product = new Product
                    {
                        Name = newRecord.Name,
                        CategoryId = newRecord.CategoryId,
                        SubCategoryId = newRecord.SubCategoryId,
                        SubSubCategoryId = newRecord.SubSubCategoryId,
                        Description = newRecord.Description,
                        Price = newRecord.Price,
                        Quantity = newRecord.Quantity
                    };

                    var productattributevalues = new ProductAttributeValue
                    {
                        ProductId = newRecord.ProductId,
                        Size = newRecord.Size
                        Quantity = newRecord.Stock
                    };
                    db.Products.Add(product);
                    db.ProductAttributeValues.Add(productattributevalues);
                    db.SaveChanges();
                    return RedirectToAction("Index", "Home");
     }

查看

@model ProjectABC.ViewModels.ProductAttributesViewModel

@using (Html.BeginForm("AddProduct", "Store", FormMethod.Post, new { enctype = "multipart/form-data", @class = "form-horizontal col-md-12", role = "form" }))
{
<div class="form-group">
    @Html.LabelFor(m => m.Name, new { @class = "col-md-2 control-label", data_val_required = "required" })
    <div class="col-md-10">
        @Html.TextBoxFor(m => m.Name, new { @class = "form-control" })
    </div>
</div>
<div class="form-group">
    @Html.LabelFor(m => m.Description, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.TextAreaFor(m => m.Description, new { @class = "form-control" })
    </div>
</div>
<div class="form-group">
    @Html.LabelFor(m => m.CategoryId, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.DropDownList("CategoryId", null, String.Empty, new {onchange="jsFunction(this.value);", @class = "col-xs-8 control-label CssCategory" })
    </div>
</div>
<div class="form-group">
    @Html.LabelFor(m => m.SubCategoryId, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">

        @Html.DropDownList("CategoryId", null, String.Empty, new { @class = "col-xs-8 control-label" })
    </div>
</div>

<div class="form-group">
    @Html.LabelFor(m => m.SubSubCategoryId, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.DropDownList("CategoryId", null, String.Empty, new { @class = "col-xs-8 control-label CssSubSubCategory" })
    </div>
</div>
<div class="form-group">
            @Html.LabelFor(m => m.Price, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.TextBoxFor(x => x.Price, new { @class = "form-control" })
            </div>
        </div>

        <div class="form-group">
            @Html.LabelFor(m => m.Quantity, new { @class = "col-md-2 control-label" })
            <div class="col-md-10">
                @Html.TextBoxFor(x => x.Quantity, new { @class = "form-control" })
            </div>
        </div>
<div class="form-group">
            <div class="col-md-offset-2 col-md-10">
                <input type="submit" class="btn btn-default" value="Create Product" />
            </div>
        </div>
   }

问题

字段中的所有值都在Product和ProductAttributesValues表中成功插入，但产品表中只有SubCategoryId和SubSubCategoryId为NULL。我在Product表中创建了这些子类别和subsubcategor列，因此我可以执行搜索。

我已经为类别，子类别和子子类别填充了3个下拉列表，当我选择任何类别时，CategoryId是使用此类的popedup

<script type="text/javascript">
function jsFunction(value) {
    alert(value);
}

但不在产品表中存储subcategoryId和subsubcategoryId值。除了这两个以外，所有剩余的字段都会被存储。

Answer 1

这是因为您对它们使用了相同的@Html.DropDownList("CategoryId" HTML标记元素。

<div class="form-group"> @Html.LabelFor(m => m.SubCategoryId, new { @class = "col-md-2 control-label" }) <div class="col-md-10"> @Html.DropDownList("CategoryId", null, String.Empty, new { @class = "col-xs-8 control-label" }) </div> </div> <div class="form-group"> @Html.LabelFor(m => m.SubSubCategoryId, new { @class = "col-md-2 control-label" }) <div class="col-md-10"> @Html.DropDownList("CategoryId", null, String.Empty, new { @class = "col-xs-8 control-label CssSubSubCategory" }) </div> </div>的问题应该是两者都不同。

<div class="form-group">
    @Html.LabelFor(m => m.SubCategoryId, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">    
        @Html.DropDownList("SubCategoryId", null, String.Empty, new { @class = "col-xs-8 control-label" })
    </div>
</div>

<div class="form-group">
    @Html.LabelFor(m => m.SubSubCategoryId, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.DropDownList("SubSubCategoryId", null, String.Empty, new { @class = "col-xs-8 control-label CssSubSubCategory" })
    </div>
</div>

应该是：

{{1}}

Answer 2

首先从控制器生成子类别和子子类别的选择列表：

ViewBag.SubCategoryId= db.Categories.Where(w => w.ParentId == null).Select(c => new SelectListItem { Value = c.SubCategoryId.ToString(), Text = c.Name }); ViewBag.SubSubCategoryId= db.Categories.Where(w => w.ParentId == null).Select(c => new SelectListItem { Value = c.SubSubCategoryId.ToString(), Text = c.Name });

然后按照@Orel Eraki的回答。

在数据库中插入值Asp.Net MVC

2 个答案: