<form id="Form1" runat="server">
<asp:DropDownList ID="dvmDrmList" runat="server">
<asp:ListItem>Theory</asp:ListItem>
<asp:ListItem>Appliance</asp:ListItem>
<asp:ListItem>Lab</asp:ListItem>
</asp:DropDownList>
</form>
我想在控制器中绑定此DropDownList.我的意思是如何在控制器类的action方法中获取dropDownList的值.谢谢.
解决方法
我看到你使用的形式有runat =“server”和asp：XXX web控件.这些概念永远不应该在ASP.NET MVC中使用.这些服务器控件不再依赖于ViewState和PostBack.
因此,在ASP.NET MVC中,您将首先定义表示数据的视图模型：
public class Itemsviewmodel { public string SelectedItemId { get; set; } public IEnumerable<SelectListItem> Items { get; set; } }
然后你将定义一个带有两个动作的控制器(一个呈现视图,另一个呈现表单提交)：
public class HomeController : Controller
{
public ActionResult Index()
{
var model = new Itemsviewmodel
{
Items = new[]
{
new SelectListItem { Value = "Theory",Text = "Theory" },new SelectListItem { Value = "Appliance",Text = "Appliance" },new SelectListItem { Value = "Lab",Text = "Lab" }
}
};
return View(model);
}
[HttpPost]
public ActionResult Index(Itemsviewmodel model)
{
// this action will be invoked when the form is submitted and
// model.SelectedItemId will contain the selected value
...
}
}
最后你会写出相应的强类型索引视图：
<%@ Page
Language="C#"
MasterPageFile="~/Views/Shared/Site.Master"
Inherits="System.Web.Mvc.ViewPage<AppName.Models.Itemsviewmodel>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="TitleContent" runat="server">
Home Page
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
<% using (Html.BeginForm()) { %>
<%= Html.DropDownListFor(x => x.SelectedItemId,new SelectList(Model.Items,"Value","Text")) %>
<input type="submit" value="OK" />
<% } %>
</asp:Content>
这就是说你也可以在你的视图中硬编码这个选择(虽然这是我不推荐的)：
<% using (Html.BeginForm()) { %>
<select name="selectedItem">
<option value="Theory">Theory</option>
<option value="Appliance">Appliance</option>
<option value="Lab">Lab</option>
</select>
<input type="submit" value="OK" />
<% } %>
并拥有以下控制器：
public class HomeController : Controller
{
public ActionResult Index()
{
return View();
}
[HttpPost]
public ActionResult Index(string selectedItem)
{
// this action will be invoked when the form is submitted and
// selectedItem will contain the selected value
...
}
}
