如何在asp.net mvc中使用dropdownlist在数据库中插入记录？

Question

我在asp.net MVC中使用实体框架数据库优先方法实现下拉列表？

我在MVC中实现了一个下拉列表，并且当我在监视窗口中调试时，显示了我插入的记录，但没有插入数据库，这是一个问题？

数据库字段名称：

tbl_product

ProductID int
ProductName varchar（50）
ProductList varchar（50）

tbl_product.cs

    // <auto-generated>
    // </auto-generated>
    public partial class tbl_product
    
        public int ProductID  get; set; 
        public string ProductName  get; set; 
        public string ProductList  get; set; 

        public IEnumerable<SelectListItem> ProductLists  get; set;

HomeController.cs

        ProductEntities prodb = new ProductEntities();

        public ActionResult Index()
        
            return View(prodb.tbl_product.ToList());
        

        public ActionResult Prodlist()
        

            var ProductLists = GetallProductList();

            var model = new tbl_product();


            model.ProductLists = GetSelectListItems(ProductLists);

            return View(model);
        

        [HttpPost]
        public ActionResult Prodlist(tbl_product product)
        
            var ProductLists = GetallProductList();

            product.ProductLists = GetSelectListItems(ProductLists);

            if (ModelState.IsValid)
            
                prodb.tbl_product.Add(product);
                return RedirectToAction("Index");
            
            return View("Prodlist", product);
        

        private IEnumerable<SelectListItem> GetSelectListItems(IEnumerable<string> elements)
        
            var selectList = new List<SelectListItem>();

            foreach (var element in elements)
            
                selectList.Add(new SelectListItem
                
                    Value = element,
                    Text = element
                );
            
            return selectList;
        

        private IEnumerable<string> GetallProductList()
        
            return new List<string>
            
                "FRIDGE",
                "WASHING MACHINE",
                "A.C",
            ;

视图：

Prodlist.cshtml

<div class="form-group">
            @html.LabelFor(model => model.ProductName, htmlAttributes: new  @class = "control-label col-md-2" )
            <div>
                @Html.EditorFor(model => model.ProductName, new  htmlAttributes = new  @class = "form-control"  )
                @Html.ValidationMessageFor(model => model.ProductName, "", new  @class = "text-danger" )
            </div>
        </div>

         //product list
        <div class="form-group">
            @Html.LabelFor(model => model.ProductList, htmlAttributes: new  @class = "control-label col-md-2" )
            <div>
                @Html.DropDownListFor(model => model.ProductList,Model.ProductLists,"Please Select Your Products:", new  htmlAttributes = new  @class = "form-control"  )
                @Html.ValidationMessageFor(model => model.ProductList, "", new  @class = "text-danger" )
            </div>
        </div>

Model1.Context.cs

    // <auto-generated>
    // </auto-generated>
    public partial class ProductEntities : DbContext
    
        public ProductEntities()
            : base("name=ProductEntities")
        
        
        public virtual DbSet<tbl_product> tbl_product  get; set;

Index.cshtml


@model IEnumerable<DropdownInsertMvc.Models.tbl_product>

@
    ViewBag.Title = "Index";


<h2>Index</h2>

<p>
    @Html.ActionLink("Create New", "Create")
</p>
<table class="table">
    <tr>
        <th>
            @Html.DisplayNameFor(model => model.ProductName)
        </th>
        <th>
            @Html.DisplayNameFor(model => model.ProductList)
        </th>
        <th></th>
    </tr>

@foreach (var item in Model) 
    <tr>
        <td>
            @Html.DisplayFor(modelItem => item.ProductName)
        </td>
        <td>
            @Html.DisplayFor(modelItem => item.ProductList)
        </td>
        <td>
            @Html.ActionLink("Edit", "Edit", new  id=item.ProductID ) |
            @Html.ActionLink("Details", "Details", new  id=item.ProductID ) |
            @Html.ActionLink("Delete", "Delete", new  id=item.ProductID )
        </td>
    </tr>


</table>

当我在监视窗口中调试时：

ProductList“ FRIDGE”字符串
[ProductLists Count = 3 System.Collections.Generic.IEnumerable System.Collections.Generic.List] >>
产品名称“电子”字符串

记录未插入数据库中？

我将在asp.net MVC中使用实体框架数据库优先方法实现下拉列表？我在MVC中实现了一个下拉列表，并且在调试时在监视窗口中显示了我插入的记录...