ASP.NETMVC-简单例子-从数据库构建Model+HTML帮助器

// 在控制器中定义一个操作来获取分类数据
public ActionResult Create()
{
    var categories = db.Categories.ToList();
    ViewBag.CategoryID = new SelectList(categories, "CategoryID", "CategoryName");
    return View();
}

// 在视图中使用HTML帮助器创建表单
@using (Html.BeginForm())
{
    @Html.ValidationSummary(true)
    <fieldset>
        <legend>Product</legend>
        <div class="editor-label">
            @Html.LabelFor(model => model.ProductName)
        </div>
        <div class="editor-field">
            @Html.EditorFor(model => model.ProductName)
            @Html.ValidationMessageFor(model => model.ProductName)
        </div>

        <!-- 使用HTML帮助器创建下拉列表 -->
        <div class="editor-label">
            @Html.LabelFor(model => model.CategoryID)
        </div>
        <div class="editor-field">
            @Html.DropDownList("CategoryID", String.Empty)
            @Html.ValidationMessageFor(model => model.CategoryID)
        </div>

        <p>
            <input type="submit" value="Create" />
        </p>
    </fieldset>
}