Question

这些是我的POCO课程：

public class PollOptions
    {
        public int Id { get; set; }
        public virtual Polls Polls { get; set; }
        public string Answer { get; set; }
        public int Votes { get; set; }
    }
public class Polls
    {
        public int Id { get; set; }
        public string Question { get; set; }
        public bool Active { get; set; }
        public virtual ICollection<PollOptions> PollOptions { get; set; }
    }

我将这个模型传递给了Index视图：

public ActionResult Index()
        {
           var poll = db.Polls.Include("PollOptions").Where(x => x.Active).ToList();
           return View(model);
        }

并在索引视图中我希望用户投票及以下是我的民意调查部分：

@section Polling{
   @foreach (var question in Model.Polls)
    {
        <h3>@question.Question</h3>
       <ul class="pollUnordedList">
       @foreach(var answer in question.PollOptions)
        {
            <li><input type="radio" name="opt" id="@answer.Id" value="1"/><span>@answer.Answer</span></li>
        }
        </ul>
    }
    @using (Html.BeginForm(actionName: "Radio", controllerName: "Home",routeValues: new { id = 2, value = 5 }))
    {
        <p><input type="submit" class="btn btn-primary" value="ارسال نظر" /></p>
    }
}

我的行动方法：

public void Radio(int Id=0,int value=0)
       {
           PollOptions opt = db.PollOptions.Find(Id);
           db.Entry(opt).State = System.Data.EntityState.Modified;
           opt.Votes += value;
           db.SaveChanges();
       }

如何获取radioButton的值和id作为路由值传递，例如在上面的路由中，Id和值的值为2.5

Answer 1

我使用jQuery AJAX解决了我的问题：

@using (Html.BeginForm(actionName: "Radio", controllerName: "Home")) {
        foreach (var question in Model.Polls)
        {
            <h3>@question.Question</h3>
            <ul class="pollUnordedList">
                @foreach (var answer in question.PollOptions)
                {
                    <li>
                        @*@Html.RadioButton("options",false,new {id=@answer.Id})<span>@answer.Answer</span>*@
                        @Html.RadioButton("options",answer.Id)<span>@answer.Answer</span>
                    </li>
                }
            </ul>
        }
         <p>
            <input type="submit" id="btnVote" class="btn btn-primary" value="ارسال نظر" />
        </p>
    }

和我的行动方法：

[HttpPost]
       public ActionResult Radio(int options)
       {
           var option = db.PollOptions.Find(options);
           if (option != null) option.Votes++;
           db.SaveChanges();
           return RedirectToAction("Index");
       }

感谢Daniel Liuzzi，不需要foreach，因为如果选中单选按钮，则会在发布表单时提交单选按钮的值。

Answer 2

为所有单选按钮使用相同的名称：

@using (Html.BeginForm(actionName: "Radio", controllerName: "Home")) {
    foreach (var question in Model.Polls) {
        <h3>@question.Question</h3>
        foreach (var answer in question.PollOptions) {
            <label>
                <input type="radio" name="answers" value="@answer.Id" />
                @answer.Answer
            </label>
        }
    }

    <p><input type="submit" class="btn btn-primary" value="ارسال نظر" /></p>
}

然后在您的操作方法上，您将选择的答案作为数组接收：

[HttpPost]
public ActionResult Radio(int[] answers)
{
    // TODO: Save your answers
}

修改

根据你关于价值总是等于1的评论，那么传递它是没有意义的。您只需为每个选定的单选按钮假设值为1。您的操作方法看起来像这样：

[HttpPost] public ActionResult Radio(int[] answers) { foreach (var id in answers) { var option = db.PollOptions.Find(id); if (option != null) option.Votes++; db.SaveChanges(); } }

如何在投票系统中投票？

2 个答案: