如何在 ASP.Net MVC 中制作复选框列表

发布于06月13日

我有一张带有复选框列表的表格.用户可以 Select 所有值、无值或介于两者之间的任何值.示例:

球门截图

我想将结果作为逗号分隔的列表写入数据库.在上面的例子中，"苹果，香蕉".我有点困惑如何为此创建模型，以及如何将从视图到控制器的结果放入逗号分隔的列表中？

推荐答案

下面是一个如何做到这一点的例子.

家庭模特.反恐精英

public class HomeModel
{
    public IList<string> SelectedFruits { get; set; }
    public IList<SelectListItem> AvailableFruits { get; set; }

    public HomeModel()
    {
        SelectedFruits = new List<string>();
        AvailableFruits = new List<SelectListItem>();
    }
}

家庭控制器.反恐精英

public class HomeController : Controller
{
    public ActionResult Index()
    {
        var model = new HomeModel
        {
            AvailableFruits = GetFruits()
        };
        return View(model);
    }

    [HttpPost]
    public ActionResult Index(HomeModel model)
    {
        if (ModelState.IsValid)
        {
            var fruits = string.Join(",", model.SelectedFruits);

            // Save data to database, and redirect to Success page.

            return RedirectToAction("Success");
        }
        model.AvailableFruits = GetFruits();
        return View(model);
    }

    public ActionResult Success()
    {
        return View();
    }

    private IList<SelectListItem> GetFruits()
    {
        return new List<SelectListItem>
        {
            new SelectListItem {Text = "Apple", Value = "Apple"},
            new SelectListItem {Text = "Pear", Value = "Pear"},
            new SelectListItem {Text = "Banana", Value = "Banana"},
            new SelectListItem {Text = "Orange", Value = "Orange"},
        };
    }
}

指数cshtml

@model DemoMvc.Models.HomeModel
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css">
</head>
<body>
    <div class="container">
        @using (Html.BeginForm("Index", "Home"))
        {
            foreach (var item in Model.AvailableFruits)
            {
                <div class="checkbox">
                    <label>
                        <input type="checkbox"
                               name="SelectedFruits"
                               value="@item.Value"
                               @if(Model.SelectedFruits.Contains(item.Value))
                               {
                                   <text> checked </text> 
                               } 
                               /> @item.Text
                        </label>
                    </div>
            }
            <div class="form-group text-center">
                <input type="submit" class="btn btn-primary" value="Submit" />
            </div>
        }
    </div>
</body>
</html>

这将导致后处理中出现以下情况:

Post Action