多个单选按钮列表，获取控制器中的选定值

Question

I am working on a dynamic multiple choice form builder. In this scenario, the form can have multiple radio button list with a different question and options.

 <strong>Question 1 </strong> <br/> <input type="radio" value=""><lable>Option1</lable> <input type="radio" value=""><lable>Option2</lable> <input type="radio" value=""><lable>Option3</lable> <input type="radio" value=""><lable>Option4</lable> <br /> <strong>Question 2 </strong> <br /> <input type="radio" value=""><lable>Option5</lable> <input type="radio" value=""><lable>Option6</lable> 

I make model for this:

 public class clsMain
    {
        public string[] selectedAnswer { get; set; }

        public List<ClsQuestions> lstQuestion { get; set; }
        public List<ClsOptions> lstOptions { get; set; }
    }

    public class ClsQuestions
    {
        public string question { get; set; }
    }

    public class ClsOptions
    {
        public int optionid { get; set; }
        public string optionvalue { get; set; }
        public string optionlable { get; set; }
    }

Controller

    [HttpPost]
    public ActionResult FromSelectedValues(clsMain model)
    {
        return View();
    }

View

@for (int i = 0; i < 2; i++){
          Question @i   
         @Html.RadioButtonFor(m => m.SelectedAnswer[i], "Answer1"+i) 
          <label>Answer1 @i</label>
         @Html.RadioButtonFor(m => m.SelectedAnswer[i], "Answer2"+i) 
          <label>Answer2 @i</label>
         @Html.RadioButtonFor(m => m.SelectedAnswer[i], "Answer3"+i) 
          <label>Answer3 @i</label>
         @Html.RadioButtonFor(m => m.SelectedAnswer[i], "Answer4"+i)
          <label> Answer4 @i</label>    
}

In short, I want to get selected options in the controller.

Answer 1

In your html file you need to group radio inputs with a specified name.

First of all, you have to change your question and answer model to make a relation.

    public class ClsQuestions
    {
        // Parent ID to be referenced by children
        public int ID { get; set; }
        public string question { get; set; }
    }

    public class ClsOptions
    {
        // Parent question id of the option
        public int QuestionID { get; set; }
        public int optionid { get; set; }
        public string optionvalue { get; set; }
        public string optionlable { get; set; }
    }

You would change your view like this

// A loop on all of the questions
@foreach(var item in lstQuestion) {

  // Get list of all options that related to parent question
  var options = lstOptions.Where(x => x.QuestionID == item.ID).ToList();

  <strong>@(item.question)</strong>
  <br/>

  // Al loop on all found options of current question
  @foreach(var option in options) {

    // Group options by using the name property ('Question'+QuestionID)
    <input type="radio" value="@(option.optionid)" name="Question@(item.ID)"><lable>@(option.optionlable)</lable>
  }
  <br />
}

Now, when you're submitting your form, you can send an array of selected options. Here is a post for sending selected options to server