获取多组单选按钮的选定值asp.net mvc 5

Question

我有一个页面有几个问题，每个问题都应该由几个用户回答，答案存储在 table 称为 QuestionReviews
我为每个用户使用以下代码 select 单选按钮

中的一个选项

foreach (var question in Model.Questions)
     {
       @Html.Hidden("QuestionId", question.QuestionId.ToString())
         <div class="row m-0  bg-silver-light border">
             <div class="col-12 bg-light pt-2 pb-2">
                 <h6>
                     @question.QuestionTitle
                 </h6>
                 <p class="text-secondary small m-0">
                     @question.QuestionBody
                 </p>
             </div>


             <div class="col-12 pt-2 pb-2">
                 <div class="form-check-inline">
                     <label class="form-check-label" for="radio2">
                         <input name="@("q"+question.SeminarQuestionId)" type="radio" class="form-check-input" id="radio2" value="20">20
                     </label>
                 </div>
                 <div class="form-check-inline">
                     <label class="form-check-label" for="radio3">
                         <input name="@("q"+question.SeminarQuestionId)" type="radio" class="form-check-input" id="radio3" value="40">40
                     </label>
                 </div>
                 <div class="form-check-inline">
                     <label class="form-check-label" for="radio4">
                         <input name="@("q"+question.SeminarQuestionId)" type="radio" class="form-check-input" id="radio4" value="60">60
                     </label>
                 </div>
                 <div class="form-check-inline">
                     <label class="form-check-label" for="radio5">
                         <input name="@("q"+question.SeminarQuestionId)" type="radio" class="form-check-input" id="radio5" value="80">80
                     </label>
                 </div>
                 <div class="form-check-inline">
                     <label class="form-check-label" for="radio6">
                         <input name="@("q"+question.SeminarQuestionId)" type="radio" class="form-check-input" id="radio6" value="100">100
                     </label>
                 </div>
             </div>
         </div>
     }

这是我的操作方法：

foreach (string key in Request.Form.Keys)
            {

                if (key == "QuestionId") 
                {
                    int qId = Convert.ToInt32(Request.Form[key]);
                    var q = _dbContext.Questions.FirstOrDefault(x => x.QuestionId == qId);
                    var reviews = _dbContext.QuestionReviews.Where(x => x.QuestionId == qId).ToList();
                    foreach (var review in reviews)
                    {
                        var k = "q" + review.QuestionId;  /// get q1,q2 and ... 
                        review.ReviewPoint =Convert.ToInt32(Request.Form[k]);
                    }

                }
            }

用户点击提交按钮后，我应该在控制器中获得问题 ID 和答案值的列表我的问题是用户应该同时回答几个问题，我不知道如何在 controller

中为每个问题获取 questionId 和 selected 无线电值

Answer 1

如果您将视图中的 foreach 循环转换为 for 循环，您可以通过对输入名称使用相同的索引 i 来关联您的值：

@for (int i = 0; i < Model.Questions.Count(); i++)
{
    @Html.HiddenFor(model => model.Questions[i].QuestionId)
    <div class="row m-0  bg-silver-light border">
        <div class="col-12 bg-light pt-2 pb-2">
            <h6>
                @Model.Questions[i].QuestionTitle
            </h6>
            <p class="text-secondary small m-0">
                @Model.Questions[i].QuestionBody
            </p>
        </div>


        <div class="col-12 pt-2 pb-2">
            <div class="form-check-inline">
                <label class="form-check-label" for="radio2">
                    @Html.RadioButtonFor(model => model.Questions[i].Answer, 20, htmlAttributes: new { @class = "form-check-input", @id = "radio2"})
                    20
                </label>
            </div>
            <div class="form-check-inline">
                <label class="form-check-label" for="radio3">
                    @Html.RadioButtonFor(model => model.Questions[i].Answer, 40, htmlAttributes: new { @class = "form-check-input", @id = "radio3" })
                    40
                </label>
            </div>
            <div class="form-check-inline">
                <label class="form-check-label" for="radio4">
                    @Html.RadioButtonFor(model => model.Questions[i].Answer, 60, htmlAttributes: new { @class = "form-check-input", @id = "radio4" })
                    60
                </label>
            </div>
            <div class="form-check-inline">
                <label class="form-check-label" for="radio5">
                    @Html.RadioButtonFor(model => model.Questions[i].Answer, 80, htmlAttributes: new { @class = "form-check-input", @id = "radio5" })
                    80
                </label>
            </div>
            <div class="form-check-inline">
                <label class="form-check-label" for="radio6">
                    @Html.RadioButtonFor(model => model.Questions[i].Answer, 100, htmlAttributes: new { @class = "form-check-input", @id = "radio6" })
                    100
                </label>
            </div>
        </div>
    </div>
}

并假设您的 ViewModel 有一个属性 Questions，像这样：

public class QuestionReviewViewModel
{
    public List<QuestionModel> Questions { get; set; } = new List<QuestionModel>();
}

您可以将您的 QuestionId 和 Answer 值绑定到您的 QuestionModel：

public class QuestionModel
{
    public int QuestionId { get; set; }
    public int Answer { get; set; }
}

只需在 HttpPost 操作中绑定到 ViewModel：

[HttpPost]
    public ActionResult PostAction(QuestionReviewViewModel vm)
    {
        if (ModelState.IsValid)
        {
            for (int i = 0; i < vm.Questions.Count; i++)
            {
                int id = vm.Questions[i].QuestionId;
                int answer = vm.Questions[i].Answer;
            }

            return Content("Something good");
        }
        else
        {
            return Content("Something rotten");
        }
    }

Post back example

编辑

在这种情况下我会使用 SelectList -> https://docs.microsoft.com/en-us/dotnet/api/system.web.mvc.selectlist?view=aspnet-mvc-5.2

您可以将 SelectList 属性添加到您的问题模型（请参阅上面的文档了解参数），它允许您设置选定值（在本例中为 Answer）：

// List of possible answers to this question
    // populated from data source
    public List<int> AnswerList = new List<int> { 20, 40, 60, 80, 100 };

    // An MVC SelectList Class
    public SelectList PossibleAnswers => new SelectList(AnswerList, Answer);

然后，在您看来，您可以循环遍历可能的答案，如果项目被选中，则有条件地应用选中的属性：

<div class="col-12 pt-2 pb-2">
            @foreach (var item in Model.Questions[i].PossibleAnswers)
                {
                    var htmlAttr = new Dictionary<string, object>{{ "@class", "form-check-input" }};

                if (item.Selected)
                {
                    htmlAttr.Add("@checked", true);
                }

                <div class="form-check-inline">
                    <label class="form-check-label" for="radio2">
                        @Html.RadioButtonFor(model => model.Questions[i].Answer, item.Text, htmlAttributes: htmlAttr)
                        @item.Text
                    </label>
                </div>
            }
        </div>

获取多组单选按钮的选定值asp.net mvc 5

get selected value of multiple group of radio button asp.net mvc 5

asp.net-mvc

asp.net-mvc-4